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{{GD Template Impl}}
{{GD Template Impl}}
[[File:UPS-Scap-5V5A-03.jpg|thumb|right|UPS-Scap-5V5A]]


[[File:UPS-Scap-5V5A-04.jpg|thumb|right|UPS-Scap-5V5A Interface Label]]
[[File:UPS-Scap-5V5A-08.jpg|thumb|right|UPS-Scap-5V5A Battery life]]
[[File:UPS-Scap-5V5A-06.jpg|thumb|right|UPS-Scap-5V5A]]
[[File:UPS-Scap-5V5A-07.jpg|thumb|right|UPS-Scap-5V5A]]
==Safety Instructions & Warnings==
==Safety Instructions & Warnings==
① Short-circuiting the positive and negative terminals of the capacitors is strictly prohibited. Damage caused by a short circuit is not covered under warranty.
① Short-circuiting the positive and negative terminals of the capacitors is strictly prohibited. Damage caused by a short circuit is not covered under warranty.
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| '''Charging time''' || Approximately 15 minutes to fully charge (under 30W PD power supply conditions)
| '''Charging time''' || Approximately 15 minutes to fully charge (under 30W PD power supply conditions)
|-
|-
| ''Current and Voltage Detection''' ||  
| '''Current and Voltage Detection''' ||  
Identifies charging and discharging status;  
* Identifies charging and discharging status;  
 
* voltage and current of the supercapacitor can be read via I2C interface, and the direction of the current indicates whether it is charging or discharging;
voltage and current of the supercapacitor can be read via I2C interface, and the direction of the current indicates whether it is charging or discharging;
* I2C interface allows reading capacitor voltage and charging/discharging current.
 
I2C interface allows reading capacitor voltage and charging/discharging current.
|-
|-
| '''Power-down detection'''||  
| '''Power-down detection'''||  
One power-down detection pin;
*One power-down detection pin;
 
* a logic level of 3.3V indicates the presence of external power input, and a logic level of 0V indicates that the external power is off. For Raspberry Pi, external power loss can be detected via GPIO26 (40-pin);  
a logic level of 3.3V indicates the presence of external power input, and a logic level of 0V indicates that the external power is off. For Raspberry Pi, external power loss can be detected via GPIO26 (40-pin);  
* for other development boards, it can be connected to a GPIO pin.
 
for other development boards, it can be connected to a GPIO pin.


|-
|-
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* Supercapacitor UPS 5V 5A PD power module x 1
* Supercapacitor UPS 5V 5A PD power module x 1
* USB C-C adapter board x 4
* USB C-C adapter board x 4
[[File:UPS-Scap-5V5A-05.jpg  |600px]]


==Battery life==
==Battery life==
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100F version: Discharge begins at 5.2V:
100F version: Discharge begins at 5.2V:
[[File:UPS-Scap-5V5A-F8.jpg  |700px]]


==Related Explanation==
==Related Explanation==
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Several Timing Analysis Methods for Restoring Power Supply After a Supercapacitor Power Failure:
Several Timing Analysis Methods for Restoring Power Supply After a Supercapacitor Power Failure:


[[File:UPS-Scap-5V5A-F9.jpg | 700px]]


The supercapacitor UPS board has a microcontroller for power management. When external power is restored, it sends a power-on signal to the Raspberry Pi 5 via a pin. If the system is currently powered off, it will power on.
The supercapacitor UPS board has a microcontroller for power management. When external power is restored, it sends a power-on signal to the Raspberry Pi 5 via a pin. If the system is currently powered off, it will power on.
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The application needs to clear this dialog box promptly to prevent a forced shutdown triggered after two consecutive power outages and recoveries. The demo code provided by our company already includes the code to clear this dialog box.
The application needs to clear this dialog box promptly to prevent a forced shutdown triggered after two consecutive power outages and recoveries. The demo code provided by our company already includes the code to clear this dialog box.


Note: After executing the shutdown command, the screen will briefly display "plymouth-poweroff.service" for approximately 1-2 seconds. If power is restored during this time, the system will fail to boot and will remain in a shutdown state until the next power outage and restoration. The probability of entering this dead zone is extremely low; it is not a concern for local use. However, for remote unattended use, please carefully evaluate the situation.
'''Note: After executing the shutdown command, the screen will briefly display "plymouth-poweroff.service" for approximately 1-2 seconds. If power is restored during this time, the system will fail to boot and will remain in a shutdown state until the next power outage and restoration. The probability of entering this dead zone is extremely low; it is not a concern for local use. However, for remote unattended use, please carefully evaluate the situation.'''
 
==Real-time monitoring of voltage and current==
 
A supercapacitor UPS can monitor the status of the supercapacitor by reading voltage and current values ​​via an I2C circuit.
 
This operation is based on a Raspberry Pi system version: 2024-11-19-raspios-bookworm-arm64.img.xz
 
Raspberry Pi system download address:
 
https://www.raspberrypi.com/software/operating-systems/#raspberry-pi-os-64-bit
 
'''1. Raspberry Pi System '''
 
'''1.1Enable the I2C Interface'''
 
This UPS uses the I2C interface to view real-time power parameters. You need to enable the I2C interface on the Raspberry Pi system:
 
Top left corner Raspberry Pi logo—Preferences—Raspberry Pi Configuration—Interfaces
 
Enable I2C, as shown in the image:
 
[[File:UPS-Scap-5V5A-R1.jpg | 500px]]
 
This completes the relevant configuration.
 
'''1.2 Viewing Real-Time Power Parameters'''
 
Open the Raspberry Pi terminal and download software to view real-time power parameters:
 
<nowiki>
<code bash>
wget -O INA219.py http://www.mcuzone.com/wiki/3006\_UPS\_Scap\_PD/INA219.py.zip
</code>
</nowiki>
 
Then run the software to see the real-time power parameters:
 
python INA219.py
 
During charging:
 
[[File:UPS-Scap-5V5A-R2-New.jpg | 500px]]
 
During discharge:
 
[[File:UPS-Scap-5V5A-R3-New.jpg | 500px]]
 
'''Note: The "current running time" here refers to the running time of the INA219.py program, not the actual charging time.'''
 
 
This is how a supercapacitor UPS starts discharging when fully charged (capacitor voltage around 5.2V), then restarts charging when the capacitor voltage drops below 3V, until it is fully charged (capacitor voltage around 5.2V).
 
 
'''2. Ubuntu system'''
 
This operation is based on the Ubuntu system version: ubuntu-24.10-preinstalled-desktop-arm64+raspi.img.xz
 
Ubuntu system download address:
 
https://ubuntu.com/download/raspberry-pi
 
'''2.1 Enabling the I2C Interface'''
 
This UPS uses the I2C interface to view real-time power parameters. You need to confirm that the I2C interface is enabled on the Ubuntu system:
 
sudo nano /boot/firmware/config.txt
 
Check if i2c_arm (highlighted in red) is set to "on". If not, please configure it as shown in the image below:
 
[[File:UPS-Scap-5V5A-U1.jpg | 500px]]
 
'''2.2 Viewing Real-Time Power Supply Parameters'''
 
Open the Ubuntu system terminal and first install smbus support:
 
sudo apt-get install python3-smbus
 
Then download the software to view real-time power supply parameters:
 
<nowiki>
<code bash>
wget -O INA219.py http://www.mcuzone.com/wiki/3006_UPS_Scap_PD/INA219.py.zip
</code>
</nowiki>
 
Run the software to see the real-time power supply parameters:
 
python3 INA219.py


===Real-time monitoring of voltage and current===
During charging:
'''3.I2C Voltage and Current Monitoring'''


* Real-time I2C bus reading via the INA219 chip: capacitor voltage, charging/discharging current, and power; remaining battery life can be estimated based on voltage.
[[File:UPS-Scap-5V5A-U2-New.jpg | 500px]]
* Supports Raspberry Pi OS and Ubuntu systems.


'''4.Power-Down Detection GPIO Script Demonstration '''
During discharge:


The board has an onboard power-down detection circuit. For a Raspberry Pi 5, it's directly connected to GPIO26 of the 40-pin GPIO for detection. See below for specific instructions (using a Raspberry Pi system as an example; the I2C interface needs to be enabled beforehand). The script code is as follows (script name: gpiot.sh): Power-Down Indication Script Demonstration
[[File:UPS-Scap-5V5A-U3.jpg | 500px]]


'''Note: The "current running time" here refers to the running time of the INA219.py program, not the actual charging time.'''


'''5.This module can also be used on non-Raspberry Pi 5 platforms, but please note the following:'''


# Power-down detection: Connect the detection signal through the appropriate GPIO pin and read the voltage and current via I2C to determine the charging and discharging status.
This is how a supercapacitor UPS starts discharging when fully charged (capacitor voltage around 5.2V), then restarts charging when the capacitor voltage drops below 3V, until it is fully charged (capacitor voltage around 5.2V).


# Power-on/off logic: Most development boards do not have dedicated power-on/off logic for Raspberry Pi 5. After power-off, the system may enter a locked state upon power restoration.
==User Manual==


# Recommended solution: After saving the data, the application continuously monitors the power-down detection pin. If power is restored, the application continues to execute the business process; if power is not restored, it will idle and wait for the system to shut down due to power failure.
Power failure detection demonstration:[http://wiki.mcuzone.com:81/index.php?title=3006_RPi5-UPS_Scap-PD_5V5A#%E5%85%AD%E3%80%81%E6%8E%89%E7%94%B5%E6%A3%80%E6%B5%8B%E6%BC%94%E7%A4%BA Power failure detection demonstration]


# Compatibility prerequisites: If the target board has a logic power-on/off pin, it can be connected to implement the same automatic power-on/off function as Raspberry Pi 5.
Real-time monitoring of voltage and current:[http://wiki.mcuzone.com:81/index.php?title=3006_RPi5-UPS_Scap-PD_5V5A#%E4%BA%94%E3%80%81%E7%94%B5%E5%8E%8B%E7%94%B5%E6%B5%81%E5%AE%9E%E6%97%B6%E7%9B%91%E6%B5%8B Real-time monitoring of voltage and current]


==FAQ==
==FAQ==
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