X728

X728 V2.5 Interface

X728 V2.3 Interface

X728 V2.2 Interface

X728 V2.1 Interface

X728 V2.1 Jumper Cap Function

X728 V2.1 packing list

X728 V2.0 Jumper cap function

X728 ups board-Interface

X728 V1.3 ups board-Jumper cap function

X728 ups board

X728 v1.2 ups board-Back

X728-A1 Packing List

X728-A2 Packing List

X728-C1 metal case for X728 V2.x/x735/x708

x728-c1 Accessories

X728 V1.3 PCB Layout

X728 V2.0 PCB Layout

X728 V2.1 PCB Layout

Update History

X728 V2.5

Released on 27th July. 2023;

Adds battery charging control via GPIO16, and this function is only suitable for advanced players, please refer to How to Use GPIO16 to control battery charging for specific usage.

X728 V2.3

Released on 20th Aug. 2022;

No any functional changes; just change the SMD 18650 battery holder to a pin battery holder to improve the reliability of battery holer soldering.

WARNING!!!

• Please be sure to install the X728 and Raspberry Pi in the correct order. The copper pillars must be fixed before installing the x728. Avoid short circuit caused by the X728 board touching the USB connector of the motherboard, which may cause the chip to be burned.
• Never make wrong polarity connection when charging and discharging battery packs. Always double check polarity of battery's connector to make sure "+" to "+" and "-" to "-". 

Installation Video:https://youtu.be/q_TmqMNhJPM

X728 V2.2

Adds Battery Reverse Polarity Protection circuit & LED indiciators on v2.2

X728 V2.1

Released on 23th Sep. 2021;

Update:

• New add a buzzer controled by GPIO20
• DC jack is changed from DC5525 to DC5521.

• User guide refer to X728-Software

X728 V2.0

• PIN33 (GPIO13) is replaced by the PIN37 (GPIO26) to avoid the I2S interface from v1.3 to v2.0.
• Improve the power path function, the battery will only charge and not discharge when connected to the PSU(power supply unit). [The PSU power will charge the battery and also pass through to the RPi when it has power. If the PSU loses power (power failure), the X728 will switch over to battery power.]
• You can choose to charge when boot up by short "CHG EN" and stop charging at shutdown.
• Increase battery overcharge, overdischarge protection circuit, added power input surge protection circuit.
• Added power input connector, which can be used with X715 to achieve 6~60V wide voltage input.
• PCB Size change: 87x63.7mm

X728 V1.3

X728 V1.3 is released at Febuary 2021.

• Remove the hardware ASD function and change it to software implementation
• The charging power indicator (LED1-LED4) is relatively brighter than V1.2.

Overview

The X728 is an advanced uninterruptible power supply expansion board for all current models of the Raspberry Pi using a 40 pin header.

It provides 5.1V 6000mA Power Backup for even the most demanding Raspberry Pi set ups, intelligent and safe power management, safe shutdown，AC power loss/ power adapter failure detection , auto power-on, full poweroff from software, battery capacity reading, and a real- time clock(RTC), buzzer alarm.

The X728 reserves the 40-pin header that can be stacked with other Raspberry Pi accessory boards for enhanced applications. The X728 can also be used with the X825/X828/X829 (2.5" HDD/SSD Shield) and X857/X862/X872 (MSATA/M.2 SSD shield) for safe data backup.

Video Test Max 5.1V 6000mA Output: https://youtu.be/m_oIDrMEp0U

SAFETY INSTRUCTIONS AND WARNINGS

• You must read these safety instructions and warnings before charging your batteries.
• Lithium Polymer and Li-ion batteries are volatile. Failure to read and follow the below instructions may result in fire, personal injury and damage to property if charged or used improperly.
• Never make wrong polarity connection when charging and discharging battery packs. Always double check polarity of battery's connector to make sure "+" to "+" and "-" to "-".
• Do not mix and use old batteries and new batteries, or batteries with different brand names.
• Lithium batteries has it's cycle life, please replace old battery with new one when it reaches it's service life or when it is two year old, whichever comes first.
• When charging Battery Pack, please put battery in a fire proof container. Please don't leave the X728 on the wood material or carpet and unattended.
• Must keep the X728 away from children.
• Please watch Main Video and Tutorial Video regarding 18650 batteries at: https://www.staysafebattery.com/en/
• Battery Recommend for X728 board, please refer to: File:NCR18650B.pdf

Features

FOR USE WITH

• Raspberry Pi 1 Model B+/ 2 Model B / 3 Model B / 3 Model B+ / 3 Model A+ / 4 Model B

OPERATING SYSTEM

• Raspbian Stretch
• Safe shutdown function tested for Raspbian, other operating systems to be tested and advised

KEY FEATURES

X728 18650 UPS + Power management board

• Smart and powerful Uninterruptible Power Supply (UPS)
• Provides continuous operations for up to 10~30hours (depending on battery type and qty used)
• Max 5.1V 6000mA Power Backup for even the most demanding RPi set ups
• Can work with X728-A2 stackable 2-cell battery holder to increase battery capacity
• Supports 3000mA fast battery charging
• Integrated over current protection and over voltage protection
• Integrated Maxim's fuel-gauge systems (Reading battery voltage and percentage via i2c)
• Integrated 10-A fully-integrated synchronous boost converter
• Intelligent automatic charging and discharging
• On-board 4 green LEDs indicate battery charging and discharging levels of 25%, 50% , 75% and 100%

• Intelligent and safe power management
• Equipped with momentary button for easy power control
• Press the button to turn on
• Press the button and hold for 1~2seconds to reboot
• Press the button and hold for 3~7seconds to implement safe shutdown
• Press the button and hold for >8seconds to force shutdown
• Supports safe shutdown and full poweroff through software
• On-board blue LED shows the status of power on, reboot and shutdown
• AC power loss or power adapter failure detection (LED and GPIO detection)
• On-board pin header allows to select auto power-on when power supplied
• Automatic safe shutdown when battery low (voltage <3.0V)
• Ultra-low standby power consumption to maximize battery life
• Operate in both charge mode and boost mode to allow full system management and battery power management
• Integrated IN-to-SYS pass-through path to pass the input voltage to the system
• Advanced system power-path management avoids batteries frequent charging and discharging
• Advanced system power-path management allows 3A fast charging and powering Raspberry Pi at the same time

• Integrated Hardware DS1307 Real Time Clock (RTC) with Battery Back-Up
• Keeps track of the time while the Raspberry Pi is switched off
• Allows the Raspberry Pi to retrieve the current date and time when it is switched back on
• Uses the 18650 battery to maintain the date and time - no additional battery required

• Powers the Raspberry Pi via the 40-pin header - no additional cabling required
• On-board DC power jack (5.5*2.5mm) and Type-C socket convenient for power input
• On-board PH2.0 connector allows to connect external power switch and DIY your perfect case
• On-board XH2.54 power output connector allows to power other devices
• Reserves the 40-pin header that can be stacked with other Raspberry Pi accessory boards

SPECIFICATION

• Power supply via Type-C socket : 5Vdc ±5%, ≥3A, Via DC power jack : 5Vdc ±5%, ≥4A
• UPS output : 5.1V ±5% Max 6A
• UPS charging current: 2.3~3.2A
• Terminal Battery Voltage : 4.24V
• Recharge Threshold : 4.1V

Note:

• Do not apply power to your Raspberry Pi via the Micro USB socket or Type-C socket.
• Do not use 18650 battery with built-in protection circuit

PCB Size

• X728 V2.0/V2.1/V2.2: 87x63.5mm
• X728 V1.3: 85x63.5mm

How to Power

• Power via DC5521 Jack of X728, 5.1Vdc +/-5% , ≥4A (DC5525 Jack is compatible with DC5521, also support 5V PSU with DC5525 Jack)
• Power via USB Type-C port of X728, 5.1Vdc +/-5% , ≥3A (Geekworm Type-C 5V 4A 20W power supply is recommended.）

Packing List

• X728 Expansion Board x 1
• Screw M2.5 *5mm x 8
• Spacer M/F M2.5 *20mm x 4
• Spacer F/F M2.5 *20mm x 4
• Jumper link Pitch 2.54mm x 3

User manual

• x728-Software: This script is required to install to enable safe shutdown function.
• x728-hardware: Provides some hardware parameter information.

X728-C1

X728-C1 is a metal case for X728 V2.3/V2.2/V2.1/V2.0 or X708/X735.

Installation Video: https://youtu.be/QOG30LXb6ds

• 

  for X728 V2.x/x735/x708

• 

  with metal switch

• 

  active cool

• 

  application

• 

  dimension

• 

  x728-c1 Accessories

• 

  with GPIO hole

X728-A1

X728-A1 Optional Raspberry Pi cooling fan

• Completely solve the overheating problem of your Raspberry Pi
• Efficient drop temp of your Raspberry Pi by using the X728-A1
• Stackable design allows you to connect both X728 and X728-A1 on your Raspberry Pi
• On-board XH2.54 power output connectors allow to power other devices
• Reserves the 40-pin header that can be stacked with other Raspberry Pi accessory boards

X728-A2

X728-A2 Optional 18650 2-Cell battery holder

• Stackable 18650 two cells lithium Ion holder
• Ideal solution to increase battery capacity
• Integrated battery protection circuit

X728 Extended Application

FAQ

Q:Why Raspberry Pi is randomly rebooting all the time?

A:You can follow the steps to test if the X728 issue:

a:Take the X728 off from the Raspberry Pi, remove all the batteries, power supply, and all jumper caps. Then connect the battery or power supply, press the blue power button on X728, the blue LED should be on, and then press and hold the power button for more than 8 seconds, the blue LED should be off.(These steps indicate that the X728 has no issue.)

b:Please check and confirm if other device occupy the GPIO with X728.

c:Still not find out the issue, please attach a video to contact us show more details.

Q: Why the X728 V1.3 remove the ASD function?

A: Because the ASD jumper will generate some issues, so we remove the ASD jumper, but now you can achieve ASD function by software. Read the voltage through I2C, and then decide whether to shut down.

Q1: Why X728 V1.2 automatically shuts down?

A: 1. X728 V1.2 will automatic safe shutdown when battery voltage is low than 3.0V, please charge in time;

2. Please try the following operation by step:

1. Remove all jumper cap,
2. Remove all 18650 battery
3. Place 18650 battery again and wait a few seconds before testing

3. What battery is recommended for X728?

A:Because there are so many kind of batteries, and the quality is also various. So we suggest to use the NCR18650B from Panasonic. Also do not use 18650 battery with built-in protection circuit for X728.

Q3: How to restart the pi board when AC Power supply is connected?

A: Please enable 'AUTO POWER ON' or 'AUTO ON' function if you want restart when the AC Power supply is reapplied.

Q4: About auto shutdown, found your board auto shutdown.

A: Please check if enable the ASD function (shorted the ASD header), if you enable the ASD function, please make sure your operation is right: first, place the battery into the battery holder, insert the jumper to ASD header after 3 seconds,this is very important!!

Q5:Is the recharge threshold and terminal battery voltage adjustable? I want to keep the batteries between 80% and 20%

A: Sorry, this is not support.

Q6: Which GPIO is used to power the X728-A1 cooling fan?

A: The X728-A1 does not occupy the GPIO, it use the PIN 2,4 to provide the power.

Q7: How can I remove all software created by the setup and start over?

A: 1) sudo /etc/rc.local , delete x728pwr.sh

2) sudo rm /etc/x728pwr.sh

3) sudo rm /usr/local/bin/x728softsd.sh

Q8: What are GPIO5 and GPIO12 used for X728 V1.3/V2.0?

A: GPIO5 control shutdown, GPIO12 BOOK OK.

Q9: Are the batteries on X728 hot-swappable? In other words, can I connect an external power supply and swap the batteries out while that is on?

A:Sorry, the batteries on X728 is not support hot-swappable. Please cut off the power to swap the batteries.

Q10: Does the rtc have a separate battery? or does it run on the 18650 batteries? what happens if you remove them? will it "lose" time?

A:No, the RTC function runs on the 18650 batteries. It will "lose" time if you remove the batteries.

Q11: What will lead to the X728 board be burnt out?

A: Please make sure the polarity of battery is "+" to "+" and "-" to "-" and match with the "+" "-" mark on battery holder. The battery protection chip IC will be over-current, heat and then burnt if one or two of the batteries are connected reversely. PS: the X728 board will not be burnt immediately if one or two of the batteries are connected reversely.

Q11: What frequency does X728 use in the I2C communication bus used to communicate with RPI?

A: It depends on the motherboard and OS, please refer to this topic as reference: https://forums.raspberrypi.com/viewtopic.php?p=312582

Q12: What the maximum current rating of X728-A1 is?

A: The maximum current rating of X728-A1 is 90MA.

Add your comment

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Anonymous user #56

2 months ago

Score 0

It would be a perfect UPS if there was some sort of thermal monitoring present (mainly for safety: stop charging and low and high temp). Please consider adding temperature sensors for batteries in your next board revision.

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Walker

2 months ago

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Thank you for your suggestion, we will take your suggestions into account. Please pay attention to our products if they are updated in the future.

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Anonymous user #55

3 months ago

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can the unit handle 12V input on the USB C port?

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Walker

3 months ago

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Hello, the maximum support of x728 is 5V, and the voltage of 12V cannot be used

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Anonymous user #54

4 months ago

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Hello, another user who wishes to design a custom enclosure, who requests a STEP model file to reference the dimensions and component placement.

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Walker

3 months ago

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Hello, X728 we have designed a shell, you can buy it directly:

https://www....t=4itemAdapt

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Anonymous user #53

6 months ago

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Hello again,

Previous 18650 LiFePO4 comment extended:

For X708 model there is the Key Features (wiki-geekworm-com/X708#Features) saying that it "supports 3.7V 18650 lithium battery and 3.7V lithium polymer battery. No capacity limit, only request 3.7V lithium battery".

However, on this wiki I couldn't find such information for X728 regarding the kind of batteries supported and the voltage. I just found the recommendation for Panasonic NCR18650B batteries which have 3.6v.

I discovered that LiFePO4 batteries are safer, they just can't burn. Which for me is something crucial if you want to leave RPi unattended. The only thing is that for 18650 LiFePO4 batteries, the more powerful I found was 3.2V and 1800mAh, and also the battery specs (copied bellow) say "Charge mode: CC/CV, use special Lithium LFP charger".

So, I would love to know if this LiFePO4 18650 battery model will still work in X728 UPS. The setup would be 4 x 18650 LiFePO4 3.2V 1800mAh, as I already have X728-C1 with space for 2 more batteries.

The battery specs are: Nominal voltage: 3.2V Nominal capacity (0.2C, 25ºC, current value of 1800mAh at 1C): 1800±2mAh Minimum capacity (0.2C, 25ºC): 1750mAh Discharge - Normal current: ≤0.9A Discharge - Fast discharge current: 1.8A Discharge - Max continuous current: 5.4A (@ 5min) Discharge - Max peak current: 10A (@ 5sec) Discharge - Cut-off voltage: 2.5±0.2V Charge - Charge voltage: 3.65±0.05V Charge - Charge current: ≤ 1.8A Charge - Cut-off current: 0.01C Charge - Charge mode: CC/CV, use special Lithium LFP charger

Thanks in advance!

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Walker

6 months ago

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Hello, in the FAQ on the X728 WIKI page, it is written that we suggest to use the NCR18650B from Panasonic. We have read the battery specifications of 18650 LiFePO4 batteries, and it should be usable. If this LiFePO4 batteries are safer, it is ok It is used, but it needs to be noted that when using batteries and power supply, be careful

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Anonymous user #52

7 months ago

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Hello! Can I use 18650 LiFePO4 3.2V 1800mAh?

Thanks!

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Walker

7 months ago

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Hello, it is possible in theory, I suggest you take a look at our SAFETY INSTRUCTIONS AND WARNINGS on X728, there are suggestions about using batteries, precautions, and battery recommendations for X728 boards

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Anonymous user #51

8 months ago

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How can I deactivate the buzzer? I use a Homematic radio adapter (). Each time there is a service or error message, the buzzer beeps. I really need to deactivate the buzzer. Please advise!

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Cindy

8 months ago

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Hi, we have the guide about how to use the buzzer, please refer to X728-Software.

Any more issue, please contact us at support@geekworm.com.

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Anonymous user #50

8 months ago

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The WSP4407 next to the RPi connector burned out. The unit is still functional. Do you know what could be causing this?

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Cindy

8 months ago

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Hi,please provide the order number and photos of the burnt part to contact us at support@geekworm.com, thanks!

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Anonymous user #49

11 months ago

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As others have mentioned, I was finding that the provided scripts were immediately shutting down the x728 but were not doing a safe shutdown of the raspberry pi. The power was immediately being cut to the raspberry pi resulting in a crash.

See the last command for an example

pi@raspberrypi:~ $ last ... reboot system boot 5.15.76-v7l+ Wed Dec 31 18:00 - 10:22 (19348+16:22) pi pts/0 192.168.68.70 Thu Dec 22 09:48 - crash (-19348+15:48) pi tty7 :0 Thu Dec 22 09:47 - crash (-19348+15:47) pi tty1 Thu Dec 22 09:47 - crash (-19348+15:47) ...

I created a new script to do a safe shutdown and while I was at it, I added functionality and made the script configurable so you can choose the behavior you want for a given system. I also added a testing mode that provides more output, doesn't do a shutdown and cleanly exits the GPIO settings for the next test run.

I have created a bin directory in the pi home for testing. The script can be setup in the root crontab as follows, which will create a log file in /home/pi/log.

@reboot python -u /home/pi/bin/auto_shutdown.py >> /home/pi/log/auto_shutdown.log 2>&1

You can then tail the logfile to see the current status.

pi@raspberrypi:~/log $ tail -20f auto_shutdown.log

12/24/2022, 21:38:02 : System Startup 12/24/2022, 21:38:02 : AC Power GOOD 12/24/2022, 21:38:02 : Battery Capacity Good (96.23%) 12/24/2022, 21:38:02 : Battery Voltage Good (4.22V) 12/25/2022, 09:26:47 : AC Power Lost - Shutdown in 15 minutes 12/25/2022, 09:28:47 : AC Power Restored - Shutdown cancelled 12/25/2022, 09:56:09 : AC Power Lost - Shutdown in 15 minutes 12/25/2022, 10:11:00 : Shutdown in progress due to AC power loss

12/25/2022, 10:16:25 : System Startup 12/25/2022, 10:16:25 : AC Power GOOD 12/25/2022, 10:16:25 : Battery Capacity Good (98.77%) 12/25/2022, 10:16:25 : Battery Voltage Good (4.22V)

As you can see, if power is restored prior to the automatic shutdown, it will return to it's normal state. This is to prevent unneeded shutdowns in the event the power is cycling as it is being restored from the grid.

Here is the last command showing good shutdowns with this script.

pi@raspberrypi:~ $ last ... reboot system boot 5.15.76-v7l+ Wed Dec 31 18:00 - 21:36 (19351+03:36) pi pts/0 192.168.68.70 Sat Dec 24 21:08 - 21:11 (00:03) pi tty7 :0 Sat Dec 24 21:07 - 21:11 (00:04) pi tty1 Sat Dec 24 21:07 - down (00:04) ...

I recommend using testing mode from the command line and then once you have all the configurations the way you want them, turn off testing mode and schedule in crontab. Remember, testing mode will provide mush more output but will not trigger a shutdown.

Here is the script. Please use it at your own risk. You will want to set the configurations appropriate for your raspberry pi purpose. I am using all three triggers because I want a clean shutdown after 15 minutes or if there is an issue with the batteries so I'm triggering well before the batteries are drained. I hope some find this helpful.

pi@raspberrypi:~/bin $ cat auto_shutdown.py

1. !/usr/bin/env python

import RPi.GPIO as GPIO import time import os import datetime import struct import smbus import sys

2. Start Config

SHUTDOWN_TRIGGER = "All" # (AC Power,Capacity,Voltage,All) - determines what settings will trigger a shutdown. AC_LOSS_WAIT_MINUTES = 15 # Number of minutes after power loss before shutdown is issued CAPACITY_THRESHOLD = 50 # Shutdown will occur when capacity drops below the stated percentage CAPACITY_STATUS_LOW = 20 # Low capacity warning below this level VOLTAGE_THRESHOLD = 3.70 # Shutdown will occur when voltage drops below the stated percentage VOLTAGE_STATUS_LOW = 3.50 # Low voltage warning below this level TEST_MODE = "N" # (Y,N) - Will show extra output and will not perform shutdown when TEST_MODE = "Y", normal operation TEST_MODE = "N" BUZZER_ON = "N" # (Y,N) - BUZZER_ON = "Y" and buzzer will beep when power is initially lost and right before shutdown BUZZER_SECONDS = 0.5 # Number of seconds the buzzer will sound

2. End Config

WAIT_SECONDS = AC_LOSS_WAIT_MINUTES * 6 WAIT_STR = str(AC_LOSS_WAIT_MINUTES)

GPIO_PORT = 26 I2C_ADDR = 0x36

GPIO.setmode(GPIO.BCM) GPIO.setup(GPIO_PORT, GPIO.OUT)

PLD_PIN = 6 BUZZER_PIN = 20 GPIO.setwarnings(False) GPIO.setmode(GPIO.BCM) GPIO.setup(PLD_PIN, GPIO.IN) GPIO.setup(BUZZER_PIN, GPIO.OUT) GPIO.output(BUZZER_PIN, 0) POWER_LOST_SEC = 0

def soundBuzzer(BUZZER_ON,BUZZER_SECONDS,BUZZER_PIN): if ( BUZZER_ON == "Y" ): GPIO.output(BUZZER_PIN, 1) time.sleep(BUZZER_SECONDS) GPIO.output(BUZZER_PIN, 0)

def acPower(PLD_PIN):

AC_STATUS = "GOOD" i = GPIO.input(PLD_PIN) if ( i == 0 ): AC_STATUS = "GOOD" elif ( i == 1 ): AC_STATUS = "LOST" return AC_STATUS

def readVoltage(bus,VOLTAGE_STATUS_LOW):

address = I2C_ADDR read = bus.read_word_data(address, 2) swapped = struct.unpack("<H", struct.pack(">H", read))[0] VOLTAGE = swapped * 1.25 /1000/16 VOLTAGE_STATUS = "Good" if ( VOLTAGE <= VOLTAGE_STATUS_LOW ): VOLTAGE_STATUS = "Low" return VOLTAGE,VOLTAGE_STATUS

def readCapacity(bus,CAPACITY_STATUS_LOW):

address = I2C_ADDR read = bus.read_word_data(address, 4) swapped = struct.unpack("<H", struct.pack(">H", read))[0] CAPACITY = swapped/256 CAPACITY_STATUS = "Good" if ( CAPACITY >= 100 ): CAPACITY_STATUS = "Full" elif ( CAPACITY <= CAPACITY_STATUS_LOW ): CAPACITY_STATUS = "Low" return CAPACITY,CAPACITY_STATUS

def safeShutdown(GPIO_PORT):

GPIO.output(GPIO_PORT, GPIO.HIGH) os.system('sudo shutdown -h now') time.sleep(3) GPIO.output(GPIO_PORT, GPIO.LOW)

bus = smbus.SMBus(1) # 0 = /dev/i2c-0 (port I2C0), 1 = /dev/i2c-1 (port I2C1)

now = datetime.datetime.now() date_time = now.strftime("%m/%d/%Y, %H:%M:%S")

AC_STATUS = acPower(PLD_PIN) VOLTAGE,VOLTAGE_STATUS = readVoltage(bus,VOLTAGE_STATUS_LOW) CAPACITY,CAPACITY_STATUS = readCapacity(bus,CAPACITY_STATUS_LOW)

print ("******************************************") print(date_time + " : System Startup") print(date_time + " : AC Power " + AC_STATUS) print(date_time + " : Battery Capacity " + CAPACITY_STATUS + " (" + str(round(CAPACITY,2)) + "%)" ) print(date_time + " : Battery Voltage " + VOLTAGE_STATUS + " (" + str(round(VOLTAGE,2)) + "V)" ) if ( TEST_MODE == "Y" ): print(date_time + " : Started in Test Mode, No actual shutdown will occur, program will exit after shutdown triggered.")

while True:

1. print ("******************************************")

now = datetime.datetime.now() date_time = now.strftime("%m/%d/%Y, %H:%M:%S")

AC_STATUS = acPower(PLD_PIN) VOLTAGE,VOLTAGE_STATUS = readVoltage(bus,VOLTAGE_STATUS_LOW) CAPACITY,CAPACITY_STATUS = readCapacity(bus,CAPACITY_STATUS_LOW)

if ( SHUTDOWN_TRIGGER == "AC Power" or SHUTDOWN_TRIGGER == "All" ): if ( AC_STATUS == "GOOD" ): if ( POWER_LOST_SEC > 0 ): print(date_time + " : AC Power Restored - Shutdown cancelled") POWER_LOST_SEC = 0 else: if ( TEST_MODE == "Y" ): print(date_time + " : AC Power " + AC_STATUS) elif ( AC_STATUS == "LOST" ): if ( TEST_MODE == "Y" ): print(date_time + " : AC Power " + AC_STATUS) POWER_LOST_SEC += 1 if ( POWER_LOST_SEC == 1 ): print(date_time + " : AC Power Lost - Shutdown in " + str(AC_LOSS_WAIT_MINUTES) + " minutes") soundBuzzer(BUZZER_ON,BUZZER_SECONDS,BUZZER_PIN) if ( POWER_LOST_SEC >= WAIT_SECONDS ): print(date_time + " : Shutdown in progress due to AC power loss") soundBuzzer(BUZZER_ON,BUZZER_SECONDS,BUZZER_PIN) if ( TEST_MODE != "Y" ): safeShutdown(GPIO_PORT) else: print(date_time + " : Started in Test Mode, No actual shutdown will occur, program will exit.") break

if ( SHUTDOWN_TRIGGER == "Capacity" or SHUTDOWN_TRIGGER == "All" ): if ( CAPACITY > CAPACITY_THRESHOLD ): if ( TEST_MODE == "Y" ): print(date_time + " : Battery Capacity " + CAPACITY_STATUS + " (" + str(round(CAPACITY,2)) + "%)" ) elif ( CAPACITY <= CAPACITY_THRESHOLD ): print(date_time + " : Battery Capacity " + CAPACITY_STATUS + " (" + str(round(CAPACITY,2)) + "%)" ) print(date_time + " : Shutdown in progress due to battery Capacity below " + str(CAPACITY_THRESHOLD) + "% threshold") soundBuzzer(BUZZER_ON,BUZZER_SECONDS,BUZZER_PIN) if ( TEST_MODE != "Y" ): safeShutdown(GPIO_PORT) else: print(date_time + " : Started in Test Mode, No actual shutdown will occur, program will exit.") break

if ( SHUTDOWN_TRIGGER == "Voltage" or SHUTDOWN_TRIGGER == "All" ): if ( VOLTAGE > VOLTAGE_THRESHOLD ): if ( TEST_MODE == "Y" ): print(date_time + " : Battery Voltage " + VOLTAGE_STATUS + " (" + str(round(VOLTAGE,2)) + "V)" ) elif ( VOLTAGE <= VOLTAGE_THRESHOLD ): print(date_time + " : Battery Voltage " + VOLTAGE_STATUS + " (" + str(round(VOLTAGE,2)) + "V)" ) print(date_time + " : Shutdown in progress due to battery Voltage below " + str(VOLTAGE_THRESHOLD) + "V threshold") soundBuzzer(BUZZER_ON,BUZZER_SECONDS,BUZZER_PIN) if ( TEST_MODE != "Y" ): safeShutdown(GPIO_PORT) else: print(date_time + " : Started in Test Mode, No actual shutdown will occur, program will exit.") break

time.sleep(10)

GPIO.cleanup()

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Anonymous user #49

11 months ago

Score 0

Sorry, the code did not paste nicely when copied directly from Linux. I'll try again with a copy from windows.

1. !/usr/bin/env python

import RPi.GPIO as GPIO import time import os import datetime import struct import smbus import sys

2. Start Config

SHUTDOWN_TRIGGER = "All" # (AC Power,Capacity,Voltage,All) - determines what settings will trigger a shutdown. AC_LOSS_WAIT_MINUTES = 15 # Number of minutes after power loss before shutdown is issued CAPACITY_THRESHOLD = 50 # Shutdown will occur when capacity drops below the stated percentage CAPACITY_STATUS_LOW = 20 # Low capacity warning below this level VOLTAGE_THRESHOLD = 3.70 # Shutdown will occur when voltage drops below the stated percentage VOLTAGE_STATUS_LOW = 3.50 # Low valtage warning below this level TEST_MODE = "N" # (Y,N) - Will show extra output and will not perform shutdown when TEST_MODE = "Y", normal opperation TEST_MODE = "N" BUZZER_ON = "N" # (Y,N) - BUZZER_ON = "Y" and buzzer will beep when power is initially lost and right before shutdown BUZZER_SECONDS = 0.5 # Number of seconds the buzzer will sound

2. End Config

WAIT_SECONDS = AC_LOSS_WAIT_MINUTES * 6 WAIT_STR = str(AC_LOSS_WAIT_MINUTES)

GPIO_PORT = 26 I2C_ADDR = 0x36

GPIO.setmode(GPIO.BCM) GPIO.setup(GPIO_PORT, GPIO.OUT)

PLD_PIN = 6 BUZZER_PIN = 20 GPIO.setwarnings(False) GPIO.setmode(GPIO.BCM) GPIO.setup(PLD_PIN, GPIO.IN) GPIO.setup(BUZZER_PIN, GPIO.OUT) GPIO.output(BUZZER_PIN, 0) POWER_LOST_SEC = 0

def soundBuzzer(BUZZER_ON,BUZZER_SECONDS,BUZZER_PIN): if ( BUZZER_ON == "Y" ): GPIO.output(BUZZER_PIN, 1) time.sleep(BUZZER_SECONDS) GPIO.output(BUZZER_PIN, 0)

def acPower(PLD_PIN):

AC_STATUS = "GOOD" i = GPIO.input(PLD_PIN) if ( i == 0 ): AC_STATUS = "GOOD" elif ( i == 1 ): AC_STATUS = "LOST" return AC_STATUS

def readVoltage(bus,VOLTAGE_STATUS_LOW):

address = I2C_ADDR read = bus.read_word_data(address, 2) swapped = struct.unpack("<H", struct.pack(">H", read))[0] VOLTAGE = swapped * 1.25 /1000/16 VOLTAGE_STATUS = "Good" if ( VOLTAGE <= VOLTAGE_STATUS_LOW ): VOLTAGE_STATUS = "Low" return VOLTAGE,VOLTAGE_STATUS

def readCapacity(bus,CAPACITY_STATUS_LOW):

address = I2C_ADDR read = bus.read_word_data(address, 4) swapped = struct.unpack("<H", struct.pack(">H", read))[0] CAPACITY = swapped/256 CAPACITY_STATUS = "Good" if ( CAPACITY >= 100 ): CAPACITY_STATUS = "Full" elif ( CAPACITY <= CAPACITY_STATUS_LOW ): CAPACITY_STATUS = "Low" return CAPACITY,CAPACITY_STATUS

def safeShutdown(GPIO_PORT):

GPIO.output(GPIO_PORT, GPIO.HIGH) os.system('sudo shutdown -h now') time.sleep(3) GPIO.output(GPIO_PORT, GPIO.LOW)

bus = smbus.SMBus(1) # 0 = /dev/i2c-0 (port I2C0), 1 = /dev/i2c-1 (port I2C1)

now = datetime.datetime.now() date_time = now.strftime("%m/%d/%Y, %H:%M:%S")

AC_STATUS = acPower(PLD_PIN) VOLTAGE,VOLTAGE_STATUS = readVoltage(bus,VOLTAGE_STATUS_LOW) CAPACITY,CAPACITY_STATUS = readCapacity(bus,CAPACITY_STATUS_LOW)

print ("******************************************") print(date_time + " : System Startup") print(date_time + " : AC Power " + AC_STATUS) print(date_time + " : Battery Capacity " + CAPACITY_STATUS + " (" + str(round(CAPACITY,2)) + "%)" ) print(date_time + " : Battery Voltage " + VOLTAGE_STATUS + " (" + str(round(VOLTAGE,2)) + "V)" ) if ( TEST_MODE == "Y" ): print(date_time + " : Started in Test Mode, No actual shutdown will occur, program will exit after shutdown triggered.")

while True:

1. print ("******************************************")

now = datetime.datetime.now() date_time = now.strftime("%m/%d/%Y, %H:%M:%S")

AC_STATUS = acPower(PLD_PIN) VOLTAGE,VOLTAGE_STATUS = readVoltage(bus,VOLTAGE_STATUS_LOW) CAPACITY,CAPACITY_STATUS = readCapacity(bus,CAPACITY_STATUS_LOW)

if ( SHUTDOWN_TRIGGER == "AC Power" or SHUTDOWN_TRIGGER == "All" ): if ( AC_STATUS == "GOOD" ): if ( POWER_LOST_SEC > 0 ): print(date_time + " : AC Power Restored - Shutdown cancelled") POWER_LOST_SEC = 0 else: if ( TEST_MODE == "Y" ): print(date_time + " : AC Power " + AC_STATUS) elif ( AC_STATUS == "LOST" ): if ( TEST_MODE == "Y" ): print(date_time + " : AC Power " + AC_STATUS) POWER_LOST_SEC += 1 if ( POWER_LOST_SEC == 1 ): print(date_time + " : AC Power Lost - Shutdown in " + str(AC_LOSS_WAIT_MINUTES) + " minutes") soundBuzzer(BUZZER_ON,BUZZER_SECONDS,BUZZER_PIN) if ( POWER_LOST_SEC >= WAIT_SECONDS ): print(date_time + " : Shutdown in progress due to AC power loss") soundBuzzer(BUZZER_ON,BUZZER_SECONDS,BUZZER_PIN) if ( TEST_MODE != "Y" ): safeShutdown(GPIO_PORT) else: print(date_time + " : Started in Test Mode, No actual shutdown will occur, program will exit.") break

if ( SHUTDOWN_TRIGGER == "Capacity" or SHUTDOWN_TRIGGER == "All" ): if ( CAPACITY > CAPACITY_THRESHOLD ): if ( TEST_MODE == "Y" ): print(date_time + " : Battery Capacity " + CAPACITY_STATUS + " (" + str(round(CAPACITY,2)) + "%)" ) elif ( CAPACITY <= CAPACITY_THRESHOLD ): print(date_time + " : Battery Capacity " + CAPACITY_STATUS + " (" + str(round(CAPACITY,2)) + "%)" ) print(date_time + " : Shutdown in progress due to battery Capacity below " + str(CAPACITY_THRESHOLD) + "% threshold") soundBuzzer(BUZZER_ON,BUZZER_SECONDS,BUZZER_PIN) if ( TEST_MODE != "Y" ): safeShutdown(GPIO_PORT) else: print(date_time + " : Started in Test Mode, No actual shutdown will occur, program will exit.") break

if ( SHUTDOWN_TRIGGER == "Voltage" or SHUTDOWN_TRIGGER == "All" ): if ( VOLTAGE > VOLTAGE_THRESHOLD ): if ( TEST_MODE == "Y" ): print(date_time + " : Battery Voltage " + VOLTAGE_STATUS + " (" + str(round(VOLTAGE,2)) + "V)" ) elif ( VOLTAGE <= VOLTAGE_THRESHOLD ): print(date_time + " : Battery Voltage " + VOLTAGE_STATUS + " (" + str(round(VOLTAGE,2)) + "V)" ) print(date_time + " : Shutdown in progress due to battery Voltage below " + str(VOLTAGE_THRESHOLD) + "V threshold") soundBuzzer(BUZZER_ON,BUZZER_SECONDS,BUZZER_PIN) if ( TEST_MODE != "Y" ): safeShutdown(GPIO_PORT) else: print(date_time + " : Started in Test Mode, No actual shutdown will occur, program will exit.") break

time.sleep(10)

GPIO.cleanup()

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Anonymous user #49

11 months ago

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Oh well, strike 2. The code is all there, you just may have to clean up the formatting.

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Anonymous user #48

12 months ago

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Mit was sind die GPIO5, 6 und 13 belegt und wie lassen sich diese als normal weiter nutzen?

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Lisa

12 months ago

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please refer toX728-hardware#Pins and GPIO used

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Anonymous user #47

12 months ago

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is it possible to safe shutdown Raspberry just after AC power OFF and NOT when batteries are low charge? how to do?

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Lisa

12 months ago

Score 0

Yes，you can refer V2.1 script

• [1]

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Anonymous user #45

12 months ago

Score 0

Can you share wire connection of switch to button? I want to connect another button with C-NC-NO. With the small blue button it works to restart with 3 seconds press. But I have tried all combinations with a button in switch and not works to shutdown and power on.

Thanks

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Lisa

12 months ago

Score 0

Hi，The x728 supports the connection of a 4pin momentary switch, but the safe shutdown function requires an installation script to be realized. Please refer to here for the switch：X728-hardware#Connector for External Power Switch

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Anonymous user #46

12 months ago

Score 0

Hello Lisa. Your documentation is wrong. Is pin 1 and 3 with a single button. Thanks

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Anonymous user #43

15 months ago

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Hello. I have been using multiple versions of v1.0v -> v1.3 -> v2.0 -> v2.2. I am currently using v2.2. Thanks for a great product.

I have ASD enabled. I have CHG enabled. In this state ...Power supply from AC ON -> Startup. This is OK. Power supply from AC is turned off → shutdown by detection in the script. This is also OK.

However... The next timing, "power supply ON from AC -> startup" does not go well. The red LED on the board lights up for a moment. It does not turn on automatically.

If I turn off the power supply again and then turn it on again, the automatic power ON works.

This did not occur in v2.0. Do you know what this problem is?

Translated with www.DeepL.com/Translator (free version)

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Lisa

15 months ago

Score 0

Hello，

This should be related to discharging time of your power adapter. once removed the power supply from AC outlet, there is still voltage output but will reduce slowly. in this perid, the X728 can detect the voltage so it cannot turn on automatically. You can try 1) Remove the power supply and wait for a longer time (normally 10~15 seconds) then plug in again. 2) Change the script and adjust the time to be longer to shut down after AC power loss. the time is subject to dicharging time of your power supply.

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Anonymous user #44

15 months ago

Score 0

Thank you for your prompt reply.

I understood the content. However, since we were considering and implementing an automatic startup and shutdown of the Raspberry Pi linked to the motorcycle key (main power), it is difficult to unplug the power supply. Therefore, I gave up on 1).

We believe that a set of 1) and 2) will be effective, but (2) alone. So, after detecting AC off, I waited 15 seconds before shutting down the system. After shutdown, I waited 30 seconds to turn AC on, but there was no improvement.

＊＊＊＊＊＊＊＊＊ Key on -> auto startup -> key off -> shutdown. After that, I will try to operate it as key on -> key off immediately (like a reset process).

This didn't occur with the previous version.

Has something changed?

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Lisa

15 months ago

Score 0

If the voltage there still present, then the X728 cannot implement auto-on. we can change the script or a resistor to match your applicaiton but will need to know the timing from 5V to 0V after key off. for this new verison, we changed the MCU and auto-on shoud be more reliable as long as the timing is confirmed.

• 

  for X728 V2.2 auto-on

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Anonymous user #42

19 months ago

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Hello, Is it possible to stop the buzzer using a button (Hardware interruption)?If yes, How can it be achieved .

Thanks

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Lisa

19 months ago

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Hello，

Yes， you can block buzzer in the script.

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Anonymous user #42

19 months ago

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Hello, I want the buzzer to work when AC power fails, but buzzer should not go on indefinitely, I want to use a button to switch off the buzzer sound.

Which pins i can use to execute this functionality ?

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Lisa

19 months ago

Score 0

Hi，

①Please refer X728-Software#FAQ--Raspberry Pi Tutorial: How to Use a Buzzer

②AC FALL(AC Power Loss LED)----When AC power supply is not connected or power supply fails, the red indicator light is always on. If connected to AC power, the red indicator will not light up.

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Anonymous user #40

19 months ago

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by the way, is there a sequence we have to follow to unassmble the hat to avoid damagin itsel or the raspberry?

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Anonymous user #40

19 months ago

Score 0

Finally got it working, are there any other commands that could be useful? is there a way to disable te buzzer?

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Harry

19 months ago

Score 0

Hi, check the x728pld.py file, try to comment out the following python code: GPIO.output(BUZZER_PIN, 1) time.sleep(0.1) GPIO.output(BUZZER_PIN, 0)

time.sleep(0.1)

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Anonymous user #41

19 months ago

Score 0

Good day,

Can both input power supplies (USB Type-C and DC Jack) be used at the same time? What would happen if one (or both) of the input's voltage or current drops below the specification?

I believe in the event where both the first, and second power supply inputs requirements fail, the AC FAIL LED will light up and the board will now use it's 18650 batteries.

Is it safe for the board to receive an input below the requirements? e.g. solar panels outputting 0V at night, or below 5V and below 3A on a cloudy day. Would the board automatically recognize the failed requirements and switch to it's 18650 batteries safely without damage to the board?

If so, what would be the threshold values of low voltage and amperes to activate the switch to it's 18650 batteries?

Also, doing some testing, I connected the board's input to a power bank battery that outputs 5V, but it's 2A (1A below the required current). The board is booting up and charging correctly. At what current would the board stop recognizing the input as reliable and activate the AC FAIL LED?

Great product by the way, I would love to know the answers to these questions. Thank you.

- Miguel

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Lisa

19 months ago

Score 0

Hi，Miguel

①Please do not use USB Type-C and DC Jack power to X728 at the same time.

②When the input voltage is lower than about 4.2~4.5, gradually switch to battery power supply

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Anonymous user #40

19 months ago

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Hi, both button top and flat top batteries woudl fit right?

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Lisa

19 months ago

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Hi， The size of the button top batteries may be a bit large. you can use flat top batteries.

please refer to：X728-hardware#18650 battery dimension;Please buy the correct size battery.

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Anonymous user #39

19 months ago

Score 0

Is it a specification that the UPS does not power down after the RPI shuts down successfully using the X728? Due to this phenomenon, RPI does not start even if power is supplied to the UPS after shutdown.

The AON pin is set to short.

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Lisa

19 months ago

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Hi，

Short the AON pin；

after shutting down, the Raspberry Pi will not restart automatically if the power supply is not replugged in or unplugged. But AON function detection is more sensitive, if it detects a voltage, it will automatically turn on.and we will improve this feature in the future.Thanks~

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Anonymous user #38

20 months ago

Score 0

On the underside of the X728 is a 5v in port (just under the barrel jack). Can this be used to supply power to the hat, or can I only use the barrel jack or USB C port?

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Anonymous user #38

20 months ago

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OP here,

the reason I am asking is that I tried to supply power to this hat through the port from a LM2968 buck convertor but the converter belw up. If I can't supply power in to the 5v XH2.54 connector, I will have to wire it in to the barrel jack (or maybe using dupont connectors straight on to the GPIO pins??????)

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Lisa

20 months ago

Score 0

Hi，

Yes，you can use [5v IN XH2.54], but please note ：DO NOT connect 5V to the BATT connector, this is very dangerous.

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Anonymous user #37

22 months ago

Score 0

Hello - I am running Raspberry Pi OS Bullseye (January 2022 release). I followed the documentation as well as I could understand it. I ran 'sudo raspi-config' and enabled the I2C interface, then rebooted the Raspberry Pi with the X728 v2.1 installed.

When I run dmesg, I see the following message displayed:

i2c i2c-1: new_device: Instantiated device ds1307 at 0x68 i2c i2c-1: Failed to register i2c client ds1307 at 0x68 (-16)

Is this something I should be concerned about?

Also - I cloned the GitHub repository and have both the x728bat.py and x728pld.py scripts in /home/pi, but I am having difficulty understanding what I am supposed to do with them. All I am interested in is having the RPi shut itself down if there is a power outage and the batteries are drained.

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Lisa

22 months ago

Score 0

Hello，

Did you find the address [0x68] of the RTC with the command [sudo i2cdetect -y 1] ?

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Anonymous user #36

22 months ago

Score 0

Hello geekworm! I've been findin X728v2.1 an excellent product! Very usefull and great quality for the price.

I forgot to turn off RPi on standby mode and it drained my cells down to 2,97V. The Cell is Samsung INR18650-35E which has a 2.65V of cut-off voltage and therefore you rescued my cells! But when I plugged DC-Jack with 5,01V to X728 it draws only 0,15A current. So It's charging very slow or not at all. One of four battery diodes is blinking.

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Anonymous user #36

22 months ago

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Oh It's me again! Just got above 3V and the current is now higher! I understand that if the voltage is extremely low then it charges very slowly in order not to destroy the cells. When voltage is above 3V it charges normally. Am I right?

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Lisa

22 months ago

Score 0

Hello，

beacuse X728 has overcurrent protection and overvoltage protection

Automatic safe shutdown when battery low (voltage <3.0V)

Ultra-low standby power consumption to maximize battery life

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Anonymous user #35

22 months ago

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I just got my board today and put batteries in and USB c power and I can't get it to stop buzzing. Hold button to shutdown and restart and its still buzzes.

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Lisa

22 months ago

Score 0

Hello,

1/ X728 V2.1 add a buzzer controlled by CPIO 20; please plug in the power supply to the X728 without raspberry pi , and turn it on to check if it is still calling; if not, please check GPIO 20 is occupied.

Raspberry Pi Tutorial: How to Use a Buzzer: please refer to :X728-Software#FAQ

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Anonymous user #35

22 months ago

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I plug in power supply without anything plugged in. No pi or batteries. Blue light comes on. Press the power button and it beeps continuously. Add batteries, still beeps. What do I do with pin 20 to get it to stop beeping?

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Anonymous user #35

22 months ago

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Plug power in and it still buzzes. Installed the python scripts from github. They work fine and says AC power is connected. I even wrote my own python script to turn pin 20 to 0 and IT STILL IS BUZZING. Can I return this? Bought on amazon

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Lisa

22 months ago

Score 0

Hi,

could you please send us some test videos？and tell us your order number,please send to <support@geekworm.com>；thanks~

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Anonymous user #35

22 months ago

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I ripped off the buzzer. Couldn't take it anymore. Everything else works as it should for my testing purposes.

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Anonymous user #34

23 months ago

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What's the power output of X728-A1's XH2.54 pins?

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Lisa

23 months ago

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Hello， It's 5V output, directly connected to the Raspberry Pi 40-pin header--pin 2,pin 4 ；output current is shared, and X728-A1 has no set limit.

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Anonymous user #33

23 months ago

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Does the X728 stop charging the batteries once they reach 100% charge?

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Lisa

23 months ago

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Yes.

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Anonymous user #32

24 months ago

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I am designing my own daughter board that must work in conjunction with the X728 DC UPS. I need to use several GPIO pins, but want to make sure I don't cause a conflict between my the board I am designing and the X728 DC UPS. I know that you use I2C on pins 3 and 5, and I believe you also use GPIO5 and GPIO12. You use Pins 2,4 for power too. Are there any other GPIO pins used by the X728 DC UPS, or am I free to use all the rest of the GPIO port?

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Lisa

24 months ago

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Hi，please refer x728-hardware--(Pins and GPIO used);you can use pins that are not occupied by x728

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Anonymous user #31

24 months ago

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• WARNING* This hardware is not yet supported by BULLSEYE released 10/30/21. python packages needed to drive the software are not available at this time. Do not upgrade to BULLSEYE until you are certain all python packages are updated.

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Anonymous user #30

25 months ago

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Hi, my AC fail led is blinking while my usbc is connected to the x782 V2.1. Any reason?

Also another x782 V2.1. is just continuously beeping while the batteries are connected. Why is that?

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Lisa

25 months ago

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Hi，1/for the BEEPING: X728 V2.1 add a buzzer controlled by CPIO 20; please plug in the power supply to the X728 without raspberry pi , and turn it on to check if it is still calling; if not, please check GPIO 20 is occupied.

2/[AC fail led is blinking]: We need to troubleshoot whether it is a line problem. Could you send us a video to check it? <support@geekworm.com> and please tell us your order NO.

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Anonymous user #29

27 months ago

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According to the "X728-hardware" on the wiki, pins 2, 3, 4, 5, 6, 29, 31, 32 and 33 are used by the X728. Are the remaining Pi pins available for us to use and does the connector on the X728 pass those through?

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Lisa

27 months ago

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Hi，Yes, you can use unoccupied Pins and GPIO

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Anonymous user #16

28 months ago

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the mosfet blew so I replaced it but it only outputs 3.7v now. What could have caused this? i see no other damage on the board.

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Lisa

28 months ago

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Hi，If the voltage across the capacitor is also 3.7V, then it is very likely that the chip is burned out（next to the upper right corner of the ups [2R2] ）. Please check it.

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Anonymous user #28

28 months ago

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Is the DC Barrel positive tip or negative tip?

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Lisa

28 months ago

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Hi，DC Barrel positive tip（the tip inside the DC port is positive.）

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Anonymous user #27

28 months ago

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I'm currently using an unprotected battery. Can you tell me why I shouldn't use a protected battery?

I think it's safer.

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Lisa

28 months ago

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Hello，Because the x728 battery holder has a built-in protection circuit.

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Anonymous user #27

28 months ago

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Thank you. I understand.

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Anonymous user #27

28 months ago

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Where can I get the switch with the four wires connected in the image?

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Lisa

28 months ago

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Hello，You can find it here： https://geekworm.com/

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Anonymous user #27

28 months ago

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Thanks, I wanted this for my X728.

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Anonymous user #26

29 months ago

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Does A2 battery holder shows power remaining?

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Lisa

29 months ago

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Hello，There is no LED light on the X728-A2 battery holder； The green indicator of x728 will show the battery status.

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Anonymous user #26

29 months ago

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I got X728 and X728-A2 (battery holder). I have Pi 4B. I can't figure it out on assembly. There were no instructions on assembly and not even steps to connect jumper. What the heck? How can I assemble this?

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Anonymous user #26

29 months ago

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My bad. I found the manual.

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Anonymous user #25

30 months ago

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Hello, Can I use gpio6 directly in gpio13 to shut it down immediately in case of AC failure? using the script x728pwr.sh ?? I have a x728 v1.3

greetings

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Lisa

30 months ago

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Hello，We do not recommend this，and we have not tested like that. Please refer the software of X728 V1.3；regards

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Anonymous user #24

30 months ago

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How to enable 'AUTO POWER ON' or 'AUTO ON' function?

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Lisa

30 months ago

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Hi,please refer here:https://wiki...E6%98%8E.jpg

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Anonymous user #23

30 months ago

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Is there a maximum number of A2 battery packs that can be chained together?

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Lisa

30 months ago

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Hello，no limit. If you want to use more batteries, we recommend X708-A1, which supports 18650 batteries/8pcs ；please refer here：https://wiki...08-A1-05.jpg

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Anonymous user #21

31 months ago

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Assuming everything is installed correctly:

When i call x728off nothing happens...

maintenance@solarstream:~ $ x728off X728 Shutting down... maintenance@solarstream:~ $

if i bash directly the script x728softsd.sh i get:

maintenance@solarstream:~ $ bash /usr/local/bin/x728softsd.sh /usr/local/bin/x728softsd.sh: line 6: /sys/class/gpio/gpio13/direction: Permission denied /usr/local/bin/x728softsd.sh: line 7: /sys/class/gpio/gpio13/value: Permission denied X728 Shutting down... /usr/local/bin/x728softsd.sh: line 20: echo: write error: Operation not permitted

and if i call the script one more time:

maintenance@solarstream:~ $ bash /usr/local/bin/x728softsd.sh /usr/local/bin/x728softsd.sh: line 5: echo: write error: Device or resource busy X728 Shutting down...

maintenance@solarstream:~ $

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Anonymous user #20

31 months ago

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OK, friends. I guess I found a workaround. My X728 had a problem with turning off 3 seconds after power up, and the problem still existed after I completely reset my Raspberry Pi 4. However, when I connected my X728 to 'another Raspberry Pi', it worked, and again confirmed that it works on the original Raspberry Pi as well. I didn't understand this logic at all, but anyway, I'm glad to find it works again. There's still a lot to say about the company not supporting customers....

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Anonymous user #22

31 months ago

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Thank you! You save my time!

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Anonymous user #18

32 months ago

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x728 ver 1.3 does not shutdown when battery voltage is 3.0V. How to get safe shutdown when battery voltage drops bellow threshold?

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Anonymous user #21

31 months ago

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same problem here, this UPS is very buggy, i consider returning to the seller...

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Cindy

31 months ago

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Hi friend,

Sorry for the delay reply, for the X728 V1.3 version, ASD function by hardware has been removed, it need to control by software to implement the fucntion.

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Anonymous user #17

34 months ago

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I have an issue with the RTC clock and can’t find a solution. I tried to install a brand new OS from the official Raspbian Buster Lite, and did a clean install of the x728.sh script from github. The error code at startup of raspberry is:

[ 22.027235] rc.local[621]: hwckock: ioctl(RTC_RD_TIME) to /dev/rtc0 to read the time failed: Invalid argument [FAILED] Failed to start /etc/rc.local Compatibility See ‘systemctl status rc-local.service’ for details.

I think the problem goes around “hwclock”. Even if I try to “hwclock -r” the result is: hwckock: ioctl(RTC_RD_TIME) to /dev/rtc0 to read the time failed: Invalid argument

How can i solve it?

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Anonymous user #16

34 months ago

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For anyone wondering. setting GPIO 13 as out and high will turn off the x728.

Would be really helpful to have that listed here as not everyone can install the soft as lifted in this wiki. I am using it on a pi running android.

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Anonymous user #14

34 months ago

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I installed and used an x728 hat on an RPi4 a few months ago, and it worked great. Unfortunately, I had to do a complete reinstall of the operating system on that Pi, and when I went to reinstall the x728... I can't get it to work. When I try to boot it up (by applying power from the power brick via the usb-c port on the x728), I can see the red and green lights on the RPi start to flash as they would during startup, but then it simply shuts down after about three seconds. This happens every time. In an effort to troubleshoot, I tried:

- disconnecting the x728 hat

- deleting the /etc/x728pwr.sh and /usr/local/bin/x728softsd.sh

- reconnecting the x728 hat (without batteries)

- booting up RPi and running sudo bash x728.sh

- shutting down RPi, moving power source to x728 hat, and installing batteries

- turning on power to x728

The result is always the same... I can see the red and green lights on the RPi flash for about three seconds and then it just shuts off. If I remove the batteries from the x728, and move the power source back to the RPi (usb-c connector) and apply power, the RPi boots up just fine.

It simply won't boot up if power is coming from / or via the x728 hat. Any ideas?

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Anonymous user #15

34 months ago

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had the same problem, the Raspberry starts briefly and switches off again. After trying for a long time, it worked again using the following procedure. 1. Disconnect the X728 from the Raspberry and remove the batteries 2. Put the X728 back on the Raspberry 3. Insert the batteries (Raspberry must not start, it did it for me every now and then, then start all over again) 3. USB-C charger on connect the X728 4. Switch on X728. Since then everything has been working normally again. Hope it helps with you too.

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Anonymous user #14

34 months ago

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Tired your suggestion, but no success. I even drained both batteries completely and the tried again. Oddly, that worked at first, but once the batteries got charged up to a certain point, the x728 shut down the RPi. I have no idea what's going on, but no one from Geekworm is responding on their dedicated forum. I'm not inclined to purchase any more of their products.

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Anonymous user #19

32 months ago

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Same here. Excluding X728, my RPi4 works perfectly. However, if I re-install it, the power is automatically cut off after 3 seconds. I'm not sure if they can really give us an answer. But we must remember. It's Made in China.

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Lisa

30 months ago

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Hello, Sorry for the late reply. for the automatically shuts down： 1/Remove all jumper cap, 2/Remove all 18650 battery 3/Place 18650 battery again and wait a few seconds before testing. 4/Please check and confirm if other device occupy the GPIO with X728.

I noticed your steps, please do not supply power through the USB-C port of the RPi.

If your x728 is V1.2 version； Please check if enable the ASD function (shorted the ASD header), if you enable the ASD function, please make sure your operation is right: first, place the battery into the battery holder, insert the jumper to ASD header after 3 seconds,this is very important!!

Still not find out the issue, please attach a video to contact us show more details.

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Anonymous user #13

34 months ago

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Hello,

on my x728 the RTC clock works, but does not continue to run when it is switched off. The Raspberry 4 has the time from the last shutdown after switching on. The fake hwclock has been uninstalled. Already had another x728 and there was no problem. Can someone help?

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Anonymous user #12

34 months ago

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Im experiencing an issue with starting up this UPS.I have tried charging my batteries with an efest battery pack charger and in the hat itself but when i try to power on the board it shuts down within 3 seconds. I have followed the troubleshooting tips above but i have yet to fin a problem. The Power light turns on and the 5v power led does as well, but then they both shut off. Id like to assume my board isnt broken and my batteries work, so is there a schema or effective way to test points with a multimeter so i can use this properly. I used it for a while in perfect condition but now it isnt working. The batteries indicate full charge on my charger and on the board. Please help

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Lisa

30 months ago

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Hello, Sorry for the late reply. please follow the steps to test if the X728 issue: a:Take the X728 off from the Raspberry Pi, remove all the batteries, power supply, and all jumper caps. Then connect the battery or power supply, press the blue power button on X728, the blue LED should be on, and then press and hold the power button for more than 8 seconds, the blue LED should be off.(These steps indicate that the X728 has no issue.)

b:Please check and confirm if other device occupy the GPIO with X728.

If there is no problem with the above test，please test it like this： 1/Remove all jumper cap, 2/Remove all 18650 battery 3/Place 18650 battery again and wait a few seconds before testing.

If your x728 is V1.2 version； Please check if enable the ASD function (shorted the ASD header), if you enable the ASD function, please make sure your operation is right: first, place the battery into the battery holder, insert the jumper to ASD header after 3 seconds,this is very important!!

Still not find out the issue, please attach a video to contact us show more details.

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Anonymous user #11

35 months ago

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Hi there,

the x728 works fine. The command "x728off" works wonderfully via the lxterminal, but I would like to use this command in a Python script so that I don't have to press the power button for 8 seconds after shutting down. Have already tried the subprocess module but without success. Does somebody has any idea? Thanks...

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Anonymous user #15

34 months ago

Score 1

I found a solution for everyone who wants to shut down the Raspberry Pi and the X728 via a Python script. - import subprocess - subprocess.call(["sudo", "/usr/local/bin/x728softsd.sh"])

so it should work.

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Anonymous user #10

36 months ago

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Mine seems to be defective, it's outputting 13.4v and the 5v out led flashes regardless of the condition. it seems to charge ok. I was planning on using this in an embedded application with an rpi 4b but I now have concerns about reliability. Anything to try?

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Anonymous user #10

36 months ago

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Never mind, one of the TPS61088 Synchronous Boost Converters had a cold solder joint. I was able to flex the board and make the problem come and go. When I reflowed solder to and around the converter the problems went away. Unfortunately due to the quality of construction I will not be able to use it for my intended purpose. Bummer!

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Xiali

36 months ago

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It should be caused by the HDMI input resolution higher than 1080p25fps (the resolution supported by the Raspberry Pi is 1080p25fps)，By the way ,There are many Raspberry Pi fans exchange experiences on our official website, you are welcome to join us https://geek...munity/forum

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Anonymous user #9

37 months ago

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How can we configure the X728 with NUT? Using this unit with Home Assistance server and would like it to be able to communicate the Battery Status. NUT is the Linux UPS Manager, and Home Assistance has support for that.

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Xiali

37 months ago

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Hi dear，for the NUT & X728, As it is a DIY project, we dont know the details, please refer to x728-Software to read the voltage and power

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Anonymous user #8

38 months ago

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Hi, what is the operating temperature and humidity range for this ? Thanks

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Xiali

37 months ago

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Hi dear ,The general environmental operation is no problem, the specific temperature range cannot be informed because the high and low temperature reliability test is not done. You can read the battery voltage and power through I2C

There are many Raspberry Pi fans exchange experiences on our official website, you are welcome to join us https://geek...munity/forum

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Anonymous user #6

38 months ago

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Hello, your x728 board is excellent!

I was just wondering though how can I get servos to move position when I shutdown when I press the power switch?

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