X728-hardware

Overview

X728 V2.5

X728 V2.3

X728 V2.1

Update:

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

X728 V2.0

Update:

• PIN33 (GPIO13) is replaced by the PIN37 (GPIO26) to avoid the I2S interface from v1.3 to v2.0.

X728 V1.3

X728 V1.2

Power Jack and Connectors

Power input	5Vdc +/- 5% ,≥3A
DC Power Plug Size	5.5*2.5mm
USB power in socket	Type-C
UPS power output	5.1Vdc 8A
Power output connector	XH2.54mm 2pin

1. X728 powers the Raspberry Pi via the 40-pin header (Pin 2 & 4)
2. Don't power the Raspberry Pi via the Pi's type-C USB socket
3. X728 can be powered via the onboard DC jack or Type-C USB power socket

Pins and GPIO used

PIN33 (GPIO13) is replaced by the PIN37 (GPIO26) to avoid the I2S interface from v1.3 to v2.0.

Pin No.	Usage
2, 4	+5V power supply
3, 5	I2C for RTC and battery fuel-gauge systems
6	Ground
29	GPIO5 for power management
32	GPIO12 for power management
33	GPIO13 for power management (For V1.3 and previous versions only)
31	GPIO6 for AC power loss detection (PLD jumper inserted, High=Power loss,Low=Power supply normal)
37	GPIO26 for power management (New add from V2.0)
38	GPIO20 for buzzer control (New add from V2.1 )
36	GPIO16 for battery charging control (New add from V2.5 )

Pin No.	GPIO No.	Remark	Ver 1.2	Ver 1.3	Ver 2.0	Ver 2.1	Ver 2.2	Ver 2.3	Ver 2.5
2, 4		5V	√	√	√	√	√	√	√
3, 5		I2C for RTC and battery fuel-gauge systems	√	√	√	√	√	√	√
6		Ground	√	√	√	√	√	√	√
29	GPIO05	Power management	√	√	√	√	√	√	√
31	GPIO06	for AC power loss detection (PLD jumper inserted, High=Power loss,Low=Power supply normal)	√	√	√	√	√	√	√
32	GPIO12	Power management	√	√	√	√	√	√	√
33	GPIO13	Power management	√	√
37	GPIO26	Power management GPIO13 is replaced to GPIO26 from Ver 2.0			√	√	√	√	√
38	GPIO20	for Buzzer control				√	√	√	√
36	GPIO16	for battery chargingcontrol							√

6-Pin Function Header for X728 V1.2

Jumper Name	Usage
PLD (Power loss detection)"	Short - AC Power loss or power adapter failure detection enabled (Active if power adapter disconnected) Open - Power loss detection disabled
AON (Auto power-on)	Short - Auto power-on when power applied (Will delay 3 seconds before powering on) Open - Auto power-on disabled
ASD (Auto shutdown)	Short - Automatic shutdown enabled when battery low (≤3Vdc ) (Battery must be >3V and installed before enabling this function) Open - Automatic shutdown disabled Procedure to enable ASD function --IMPORTANT 1. Battery voltage must be >3Vdc 2. Insert the battery into the holder 3. Wait 3 seconds then insert the jumper 4. If the jumper inserted before battery, remove battery & jumper then repeat step 1, 2 and 3.

Connector for External Power Switch

Pin No.	Pin Description
1	Power on/off control connecting to switch
2	Ground
3	Ground
4	LED+ for power on, rebooting and shutdown

1. Please use momentary switch only and don't use latching switch
2. Connector - Pitch 2.0mm 4pos

Power button (Script for power mgnt installed)

Press and Release	Raspberry Pi and X728 turn on
Press and hold for 1~2 seconds	System rebooting
Press and hold for 3~7 seconds	System shutting down
Press and hold for >8 seconds	Force shutdown

Function LEDs

LED Name	Usage
BAT LOW	LED red on indicates battery low (≤3.0Vdc) or blue power button pressed (Jumper for ASD inserted)
5V OUT	LED green on flashing indicates 5V power out and UPS powered by battery
AC FAIL	LED red on indicates AC power loss or PSU failure or PSU disconnected
PWR	LED blue indicates Stays on - Power on Blinks rapidly - system rebooting Blinks slowly - Shutting down

Fuel gauge - LED Indicator

Operation of Discharging:

Capacity C (%)	D1	D2	D3	D4
C ≥75%	ON	ON	ON	ON
50%≤C＜75%	ON	ON	ON	OFF
25%≤C＜50%	ON	ON	OFF	OFF
3%≤C＜25%	ON	OFF	OFF	OFF
0%＜C＜3%	Flashing	OFF	OFF	OFF

Operation of charging:

Capacity C (%)	D1	D2	D3	D4
Fully charged	ON	ON	ON	ON
75%≤C	ON	ON	ON	Flashing
50%≤C＜75%	ON	ON	Flashing	OFF
25%≤C＜50%	ON	Flashing	OFF	OFF
C＜25%	Flashing	OFF	OFF	OFF

PCB Layout

• 

  X728 V1.3 PCB Layout

• 

  X728 V2.0 PCB Layout

• 

  X728 V2.1 PCB Layout

18650 battery dimension

Please use high quality batteries from Samsung 35E 18650 lithium battery, Panasonic NCR18650B, Toshiba, etc. Do not use the 18650 battery with built-in protection circuit because it will limit the discharge current.

Raspberry Pi Official GPIO Expansion describe

Installation Guide

Installation Video for X728+X728-A1+X728-A2: https://youtu.be/q_TmqMNhJPM

Return to X728

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Anonymous user #55

3 months ago

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Anyone know if these work on non raspberry pi OS ABC's?

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Anonymous user #54

4 months ago

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Hello, I plan to use X728 v 2.5 to overcome problems with quite often (several per month) AC power outage for some minutes. I expect X728 will supply power in these situation.

But what will happen if the power outage is longer and voltage on battery goes under 3V? I am not sure I would be able to install x728 software to catch safe shutdown.

I need similar behavior as with no X728. Hard power off and power on when AC is back again to let RPI boot and operate again. The location is remote and there is no one to push any buttons. I need autonomous operation and no extra software install.

Thank you MS

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Lisa

4 months ago

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Hi,please email us [info@geekworm.com]；We will answer your questions via email.thank you.

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Anonymous user #53

8 months ago

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Hello, is the X728 compatible with the X715? How are they connected? Do they need an external power cable between them? Would you share a block diagram or schematic to verify that there are no issues between these boards?

Thank you

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Lisa

8 months ago

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Hello,The X728 can support the X715. Mount the X728 on top of the X715；need a 2*20 Pin Female Header to increase the height, and need spacers of the appropriate height to hold the X715 in place. We do not recommend this and suggest you consider the X729 if you want to use a UPS that supports wide voltage inputs.

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Anonymous user #52

9 months ago

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Hi, Can you please clarify if the X728 V2.5 complies with the new Raspberry Pi 5 HW platform and the latest 64 bits OS Debian version: 12 (bookworm)? Can the scripts be used and installed at the same way? Thanks, Artur

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Walker

9 months ago

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Hello, X728 V2.5 is not applicable to Raspberry Pi 5, please refer to UPS series products for Raspberry Pi 5 X1200 X1201 X1202

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Anonymous user #51

10 months ago

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Hi, Can you please clarify if the X728 V2.3 complies with the new Raspberry Pi 5 HW platform and the latest 64 bits OS Debian version: 12 (bookworm)? Can the scripts be used and installed at the same way? Thanks,

Nahum Budin.

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Walker

10 months ago

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Hello, X728 V2.3 is not applicable to Raspberry Pi 5, please refer to UPS series products for Raspberry Pi 5: X1200 X1201 X1202

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Anonymous user #50

10 months ago

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Can you please provide details what each GPIO does (instead of just writing "Power Management")?

I could figure out from some forum posts, that when GPIO12 goes low, the x728 should power down with some delay. In my case this is not working. The aim is to power down the Raspberry safely via "poweroff" and then cut the power.

Again details to the funciton of the GPIOs would be great. Like for example "Pulling GPIO26 high for 2s cuts the power". Otherwise its guesswork from the scripts.

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Walker

10 months ago

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Hi, sorry, this belongs to the content of product design, this we have no way to provide

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Anonymous user #49

11 months ago

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I have a couple V2.1 and a couple V2.5. Hooked up to my electronics and RPi I am pulling about 6amps out. The V2.1 powers it for an hour, but the V2.5 shuts down in a couple minutes. Do they use a different setting for "over-discharge" battery voltages or something? I can't find V2.1 boards for sale anymore, so is the discharge level "hackable" on the V2.5?

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Walker

11 months ago

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Hi you can refer to it: X728 ,

X728 V2.5 Compared to X728 V2.1, X728 V2.5 only adds a few features, but nothing else has changed.

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Anonymous user #48

16 months ago

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I just purchased the Mini ATX PSU II - Desktop ATX Power Supply raspberry pi HAT. I currently have the X728 V2.3 on my Pi 4B. How do I stack these units together so I can use ATX power and fallback to the X728 when ATX loses power? I expect maybe needing to do some coding to make them work together software side, but will I be able to use this combination as expected?

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Walker

16 months ago

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Hello, we have not tested X728 and PI4 and Mini ATX PSU II assembled together, this may need to be tried by yourself

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Anonymous user #48

12 months ago

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I see that there is now a V2.5 on here with a GPIO to control battery charging. Does this mean you can control whether the batteries are enabled via software now? If so, that brings a whole new realm of possibilities with combining other power supply hats and using one of these as a dedicated fallback, if I'm understanding correctly.

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Walker

12 months ago

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Hello, you can refer here: How_to_Use_GPIO16_to_control_battery

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Anonymous user #47

17 months ago

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I have several of these in use and run into the same issue on all of them. They all sit for approx. 3 months powered off without external power. when they are plugged back in the batteries have to be removed and reinstalled before they will function correctly. Is there any way to correct this?

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Walker

17 months ago

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Hello, what version of X728 are you using?

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Anonymous user #46

20 months ago

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Hi Can I just use XH2.54mm 2pin power out without attaching to GPIO? I guess in this occasion I will not have info about battery percentage and volts.

This is a very good product. I wish it had time scheduled power on. Is there a workaround to achieve it?

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Anonymous user #44

21 months ago

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Hi, using pins 37 and 38 is a bad idea - it is SPI1 interface of RASPI and cant be changed, and is needed by our project. How to disable these on X728?

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Anonymous user #45

21 months ago

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Believe us, it is really difficult to choose which GPIO to use. It seems that we have no other GPIO to use. No matter which GPIO we choose, it may not satisfy everyone. Thank you for raising a new requirement. The X728 has undergone at least 5 revisions, and there is no way to satisfy all users, just like chatGPTb, which is in full swing, cannot satisfy everyone. This is really a frustrating thing. . . . But your questions will be the driving force for us to move forward.

Harry/Geekworm

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Harry

21 months ago

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You can also use other GPIOs (such as PIN 17- PIN26), why must use PIN37 and PIN38? Refer to

Harry / Geekworm

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Anonymous user #44

21 months ago

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Thank you Harry,

To operate an additional SD Card Reader we need to use hardware SPI interface, Raspi has two. SPI0 uses pins 19,21,23 for MISO/MOSI/SCLK, which is unusable for us as we have a Lidar on UART4, which is also using pin 21... SPI1 is hard wired to pins 35, 38, 40 for MISO/MOSI/SCLK, which cant be changed.

Right now I am trying to find out a pin layout where I have no collisions. The problem is we have to use I2C, 4 different UARTs, SPI and X728 at the same time + MIPI touchscreen...

Petr

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Anonymous user #43

21 months ago

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Hi. How to start the system when batteries are full and is not powered by usb type c or DC5V 4A?

I press slightly the blue button on x728 but it does not start. The fail light is red and power light is blue.

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Lisa

21 months ago

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Hi，power light is blue--It means that the X728 is powered on, is the power indicator light of the Raspberry Pi on?

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Anonymous user #42

22 months ago

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The flashing stopped, after the batteries were fully charged.

But for the record, the setup is as follows: Raspberry Pi 4B with RaspberryPi OS Lite on a 16GB USB thumb drive. Connected are a 4 Channel USB Relay and a USB NFC Card Reader.

If the behaviour reappears I will happily send you an image or video to your support email.

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Lisa

22 months ago

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AC FAIL indicator flashes indicate that the load is relatively large and the power supply is insufficient. It is recommended that you use DC5V 4A power supply.

Any questions, please feel free to Email us. thanks~

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Anonymous user #42

22 months ago

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I noticed, when USB peripherals are connected to the raspberry, the AC FAIL LED flashes together with the battery indicator.

Any suggestions why and if this is harmful? In my case its a NFC card reader, which should not draw that much power. Same happens with an USB Relay.

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Lisa

22 months ago

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Hello， When the AC FAIL indicator flashes, it should be insufficient power supply. Could you please tell us the parameters of your power adapter?

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Anonymous user #42

22 months ago

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The power supply is the official Raspberry Pi one: Model: KSA-15E-051300HE Output: 5.1V | 3.0A 15.3W

Doesnt this suffice?

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Lisa

22 months ago

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Besides the Raspberry Pi board and NFC card reader, are there any other devices connected? Do you mind providing some pictures or videos for our reference? please Email to [support@geekworm.com] ; Thanks~

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Anonymous user #41

23 months ago

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can I power through 11 5VIn XH2.54?

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Lisa

23 months ago

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Yes, you can use it.

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Anonymous user #40

23 months ago

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I paired this with the X728-C1 Case which has a momentary switch with blue LED ring. Any chance the button LED is connected to GPIO pins to control it (turn on, off, flash, etc).

Next update would be a good idea to have it be an RGB LED to give unlimited feedback to user. (red means error, green all success, etc).

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Lisa

23 months ago

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Thnaks for your feedback.there is no smart momentary switch like that.but you can see the indicator light on X728 ups board.

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Anonymous user #39

23 months ago

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hi, I bought a x728 V1.2 exactly 24 months ago. It worked fine until I decided to make a copy of my sc-card and so shut down my Raspberri Pi.

When powering up again, the Pi started a few seconds and then the power got cut by the UPS. all led's stoppped blinking exept for the charging ones. I pressed the switch shortly and the power coma back on, for a few seconds and the power got cut again. Long story short: I cannot get the UPS started again, why?

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Lisa

23 months ago

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Hi,1/Please unplug the batteries, leave it for a few minutes and then test again;

2/Have you upgraded the OS? If you have upgraded the OS, it is recommended to UNINTALL first and then reinstall.

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Anonymous user #39

23 months ago

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Hi Lisa, can I upgrade the OS, I mean is there upgradable software on the UPS?

Where can I find it?

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Lisa

23 months ago

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The operating system is Raspberry PI OS, not UPS. If you upgrade it, reinstall the UPS script to test.

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Anonymous user #39

23 months ago

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The UPS is acting strange. The 4 led's indicating the loadlevel has stopped, they stay out. Domoticz (raspberry pi) shows a loadlevel of 140% !!! The battery voltage shows 4,66V. I immidiately performed a shutdown and detached the UPS. An external voltmeter shows indeed 6.6V The ups has become to dangerous to use.

Is there any chance to ever get it in proper acting again?

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Anonymous user #38

26 months ago

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Hi, I'm unable to find the recommended battery Panasonic NCR18650B, as a replacement, the seller recommends the Panasonic NCR18650GA, 3450mAh battery. Is it ok to use that model? Thank you very much!

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Lisa

26 months ago

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Hi，You don't have to use the batteries we recommend, but please make sure to use genuine, high-quality batteries. And note the X728's requirements for battery size--[18650 battery dimension] .

Thank you.

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Anonymous user #37

30 months ago

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Hello, the batteries referenced in user manual (Panasonic NCR18650B) don't fit in the the X728 v2.1, are there any other batteries that would definitely fit in the UPS?

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Lisa

30 months ago

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Hi，

Please pay attention to the size requirements of the 18650 battery（Max.65.3mm length）, it is recommended that you buy flat batteries.

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Anonymous user #36

30 months ago

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can x728-a2 be used together with x708?

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Lisa

30 months ago

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Yes, you can use X708 UPS HAT with X728-A2 2-cell battery holder

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Anonymous user #35

32 months ago

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Hi, RPi4/4GB, all updates & upgrades; cloned and installed files from Git this morning (20220317). Blue button only works to force shutdown (>8 seconds press), and when I run the battery monitor script (I moved it to a "Scripts" directory in my Pi/Home), I get this error:

pi@raspberrypi:~ $ sudo python /home/pi/Scripts/x728bat.py /home/pi/Scripts/x728bat.py:14: RuntimeWarning: This channel is already in use, continuing anyway. Use GPIO.setwarnings(False) to disable warnings. GPIO.setup(GPIO_PORT, GPIO.OUT)

Traceback (most recent call last): File "/home/pi/Scripts/x728bat.py", line 38, in <module> print ("Voltage:%5.2fV" % readVoltage(bus)) File "/home/pi/Scripts/x728bat.py", line 20, in readVoltage read = bus.read_word_data(address, 2) TimeoutError: [Errno 110] Connection timed out pi@raspberrypi:~ $

I have uninstalled and re-installed the files twice. The x728off and x728pld.py commands work - but not the battery level. Any help?

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Anonymous user #35

32 months ago

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I have a V 2.1

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Lisa

32 months ago

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Hi，

You can also refer to this link for X728 v2.0/2.1/2.2 versions；http://www.s...oftware.html

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Anonymous user #33

33 months ago

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Hello,

How safe it is the code for safe shutdown if volt is under 3.00? I am having a web server and i am worry of losing data or corrupt data. I am using sudo sync && sudo shutdown -h now. The puthon code is using gpio for shut down.

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Lisa

33 months ago

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Hello，

X728 --Automatic safe shutdown when battery low (voltage <3.0V)；

If you are worried about data loss, we recommend that you make a backup.

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Anonymous user #32

33 months ago

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Hello, just got the X728 Board, V2.1 is printed on the side looking to the raspberry when installed. The direction of polarity in battery compartments are facing in the same direction. In the installation manual the batteries are facing in contrary directions, just to be sure and not to destroy anything: the v2.1 wants the polarity of the batteries like its printed: same direction, right? Thanks in advance and regards,

Max

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Lisa

33 months ago

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Hello，

Yes, V2.0 / V2.1 version--the battery polarity directions are the same. Please install the battery according to the direction printed on the board.

The installation manual is the previous version V1.2 / V1.3

Best regards

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Anonymous user #30

33 months ago

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Hi,

I am having v2.0. My problem is that every time i use "x728off" command to shutdown my Pi and then remove the power cable from the board, it is boot up. Any idea how to fix this?

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Lisa

33 months ago

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Hello，

This may happen if [Auto ON] is shorted. Please check whether the [Auto ON] is shorted.

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Lisa

33 months ago

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Please remove the power adapter directly instead of the power cable to test.

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Anonymous user #31

33 months ago

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Hi Lisa,

yes the AUTO ON is shorted, as i need to power on when the power returned. I will test first power adaptor but i think i have test it without any luck. Any another idea? I am writing a python code with all functions and email alert if power is OFF - ON - %. I will post it on github.

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Anonymous user #29

34 months ago

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Is it possible to use 18650 batteries with a protection circuit integrated? because it seems I can't find them without it

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Lisa

34 months ago

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Hi，

Yes, you can use batteries with a protection circuit, but please pay attention to the battery size requirements--X728-hardware#18650 battery dimension.

However, many batteries with protection circuits are too large to be installed. To avoid this problem, we require the use of batteries without protection circuits.

And please use quality 18650 batteries, inferior batteries will damage the ups board.

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Anonymous user #28

34 months ago

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1. 28 - Thanks for your reply, but regarding your "2.[when the external power is restored while RPi is still under Battery power]--The external power supply powers both the battery and Raspberry Pi." - if RPi is still under battery power after shutdown (but not Poweroff), we need to issue a Bootup via GPIO5. How can we configure X728 to do this after AC is restored (without the button)? Or jouu mean that RPI is powered down just after Shutdown?

Thanks in advance.

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Lisa

34 months ago

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Hello

You mean that RPI is not powered off, but x728 is still running? This doesn't happen because the Raspberry Pi is powered off via the x728.

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Anonymous user #28

34 months ago

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Hi, could you please advise about the ability of X728 to operate in unattended mode (without button)? I see it has an Auto Shutdown, but what about Auto Bootup in situation, when the external power is restored while RPi is still under Battery power?

Thanks in advance & best regards.

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Lisa

34 months ago

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Hi,

1.The new version cancels the ASD(Auto shutdown) jumper, you can achieve a safe shutdown through software.please referX728-Software.

2.[when the external power is restored while RPi is still under Battery power]--The external power supply powers both the battery and Raspberry Pi.

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Anonymous user #27

34 months ago

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Hi could you update the pictures to show the newest X728 v2.1 model? Thank you

Best regards

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Lisa

34 months ago

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Hi，

Please refer to the two pictures at the top right of X728. Thanks~

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Anonymous user #26

34 months ago

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Do you happen to have 3D models available for your boards (STP or STEP files)? I am busy developing a main board, where I plan to use your X728 as well as another board of yours, in my design. Having the 3D models means I can produce a high quality 3D rendering of my completed board, with your board located on it too!

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Harry

34 months ago

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Hi, Thanks.

Refer to X728-hardware#PCB_Layout

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Anonymous user #25

35 months ago

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Hi! How to decrease brightness of four Fuel gauge LEDs in my X728 v1.3? They burns my eyes.

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Lisa

35 months ago

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Hello, We are sorry for that, and x728 does not support adjusting the brightness of the LED light, you can cover it with tape. Best regards

Geekworm

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Anonymous user #24

39 months ago

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I'm trying to connect a momentary switch to the External Power Switch, but I'm not sure how to connect the wires. I have an image of the wiring guidance for the switch itself. Is there a way I can email it to you for guidance?

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Lisa

39 months ago

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Hi， please refer herePH2.0 Conector Specification； and we also replied to your email. Regards

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Anonymous user #24

39 months ago

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Does anyone among the user group have an insight on this. I emailed the Geekworm support account, and their response was completely unhelpful.

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Anonymous user #20

39 months ago

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Hello, i am having x728 v1.3. First i would like to ask what is Vin? Also, I am getting error. I pluged my USB-c and charged my board. If it is charged 100% it started to discharge and never start charging again. Also, all led are flashing, Why? I tried with different chargers too. In order to charge again, i have to unplug and plug again my charger.

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Lisa

39 months ago

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Hello，1/VIN--5V Voltage Input（Can be powered by this VIN 2Pin header）；2/If it is 100% fully charged, it is normal for the battery to begin to discharge. The LED light should display to 100%. 3/But I didn’t understand your question. Do you want to discharge while charging?

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Anonymous user #21

39 months ago

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Hello, Lisa. If i charged and boot my Pi, it will start discharging and automatically will start to charge after the battery drop. My problem is that it is not start to charge again instead i am getting all LED flashing like i don't have a charger plug.

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Lisa

39 months ago

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Hi，Please take out the batteries, unplug the power supply, and reinstall it. Sorry for the inconvenience, we have improved this problem in V2.0

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Anonymous user #22

39 months ago

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Hi Lisa, reinstall only batteries or you mean and the software? Can i return the hardware and get v2.0? I have it for 1month and never managed to make it work fine.

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Lisa

39 months ago

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Hi，Unplug the power, reinstall the batteries, no need to reinstall the software.

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Anonymous user #23

39 months ago

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Hi Lisa, can i return the hardware and get v2.0? I bought it last month from aliexpress official store.

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Anonymous user #22

39 months ago

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Hi Lisa, i tried twice your simple fix but still all led flashing. Tried different chargers and still no luck. I am sure the hardware is malfunction. I can't use it in my project and the horst is that i spent 105$ to buy it(x728, x728-A1, x728-A2, x857).

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Lisa

39 months ago

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Hi，If you want to return and replace V2.0, please email us. Please tell us your order number；thanks 【support@geekworm.com】

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Anonymous user #19

40 months ago

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I have the x728 and it worked great for a while. But I had to do a reinstall of of something, and at some point the x728 just stopped working. So now when I install the x728 on the RPi 4, it shows the batteries on the x728 charging, but the RPi is completely unresponsive. Is there anyway to check if the x728 is no longer able to interface with the RPi?

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Lisa

40 months ago

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Hello，please refer here: X728 FAQ and test it again.If not resolved, please email us【support@geekworm.com】and tell us your order NO.;THANKS

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Anonymous user #18

41 months ago

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Hi, how to wire for use with X765 together for the POE powered RPi with battery backup ?

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Lisa

41 months ago

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Hi，Do you want to use x765 POE with X728 UPS at the same time? Sorry， We have not tested this and do not recommend it.

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Anonymous user #17

42 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

Marcos

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Lisa

41 months ago

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Hi，Marcos；

No，we do not recommend this, GPIO6 is only used for power check.Best regards

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Anonymous user #14

44 months ago

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X728 V1.3 removes the ASD function, so instead of a six-pin function header, there is a four-pin function header. AON is the same as described here. The other pair of pins is labeled VIN rather than PLD -- are the VIN and PLD functions the same, or does VIN do something else?

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Anonymous user #15

44 months ago

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Looks like Voltage In ( + and - signs on either side), so PLD is gone too?

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Anonymous user #16

43 months ago

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PLD and ASD are both automatic now.

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Anonymous user #13

44 months ago

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can this be used with the Freenove Smart car shield for Raspberry Pi?

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Anonymous user #12

45 months ago

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This command does not work.

sudo apt-get install python-smbus Reading package lists... Done Building dependency tree Reading state information... Done Package python-smbus is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source

E: Package 'python-smbus' has no installation candidate

How do I get the Python scripts like x728bat.py?

Thanks,

Bob

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Anonymous user #11

45 months ago

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Can i power it from a solar panel via DC 5525 Jack in, to act like a solar charger ?

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Anonymous user #5

47 months ago

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Hi, I have the 728 for some time now and it is a great board. Now I want to connect an extension to the 40 pin GPIO pins on top, but there is no print on the component side of the unit. So, looking from above, which prin is pin 1?

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Cindy

47 months ago

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Hi friend,

The pin out is the same with Raspberry Pi 4, please refer to raspberry PI 4 PIN OUT,thanks!

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Anonymous user #10

47 months ago

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What is the DC jack? is the pin + or -?

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Xiali

47 months ago

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Hi dear ,the DC jack is a port to power in,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

48 months ago

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RPi 3B+: The X728 appears to be operating properly, including providing 5V to Pins 2 and 4. But when I plug the X728 into my RPi 3B+, the 5V pins immediately drop to 3.2V and the Pi will not boot.

Any suggestions?

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Anonymous user #34

33 months ago

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I'd also like to know more about the behavior of the 5V output (pins 2, 4). How much current can be drawn at stable 5V operation? Does it have a short-circuit detection. I would like to use this port to power a GoPro camera.

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Lisa

33 months ago

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Hello，

UPS output : 5.1V ±5% Max 6A

Depending on the specific usage scenario, the output current will fluctuate.

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Anonymous user #8

48 months ago

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Although not advertised as compatible, the X728 is working fine when plugged directly into my RPi Zero W. However, I found that if I use a cable and make only the connections specified between the X728 and Pi (Pins 2-6, 29, 31-33) the i2C stops working, so that the clock and battery status functions won't work. After some experimentation I found that connecting pin 1 in addition to the documented pins restores the i2c functions. I'm guessing the X728 is getting the 3.3V voltage level used for the i2c from the Pi. I assume this may be the case for all Pi models. If I'm right, you should add pin 1 to the list of "Pins and GPIO used."

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Xiali

48 months ago

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Hi dear，tks for your effort , 1. AC POWER LOSS has GPIO detection, it can be shut down after detection; 2. Pls plug in the shorting cap to get the AUTO-ON function, 3. If you'd like to send a signal to tell the UPS only provide backup power for x amount of seconds ,pls develop your own script to get the functions.

4.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 #6

51 months ago

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Clarify please feature "Auto-On". Here is scenario: 1. Software detect AC-power loss. 2. Software gracefully shutdown RPi (battery still charged!). 3. AC-reapplied.

Will be RPi turned automatically on?

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Anonymous user #7

49 months ago

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Has this been confirmed or any feedback?

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Xiali

49 months ago

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Your question seems to be contradictory. . . .

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Anonymous user #7

48 months ago

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The scenario is this. Basically you want to use the UPS as a means of graceful software shutdown.

1. On AC Power Loss -> graceful software shutdown 2. On AC Power Gain -> boot raspberry Pi

I cant seem to find a configuration that will allow you to use the UPS in this way.

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Anonymous user #7

48 months ago

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Is there a way you could send a signal to tell the UPS only provide backup power for x amount of seconds? This would allow for an AC power controlled graceful shutdown and boot.

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Anonymous user #5

52 months ago

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Can I power the X825 board as well as the RPi4B from the X728? How do I connect it?

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Cindy

52 months ago

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Hello sir,

When use the X728 with X825 board, please power from X725, do not power from X825 or Raspberry Pi 4.

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Anonymous user #5

53 months ago

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One more question: why can't I use protected 18650 batteries? They are more safe, aren't they?

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Anonymous user #5

53 months ago

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I bought the X825/X735 set with case and power supply a short time ago and now want to replace the X735 by the X728. Is this possible? It will not fit in the case anymore though and the cooling fan will be gone, so what is the best solution to avoid overheating?

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Anonymous user #4

53 months ago

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How could one write a script to trigger the x728off code to run in the event of a Power Loss Detection

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Anonymous user #1

54 months ago

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Which jumpers are which?

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Anonymous user #2

54 months ago

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Pin assignments for the jumpers are printed on the underside of the board at least! :

From the Power jack end : AON (Auto On) PLD (Power loss detection) ASD (Auto shutdown)

to nearest the USB-C Connector

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Anonymous user #3

54 months ago

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No, correction, it reads thus :

From the Power jack end : PLD (Power loss detection)

AON (Auto On) is the middle pair.

ASD (Auto shutdown)

is nearest the USB-C Connector.

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