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Hardware description |
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1 |
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Raspberry Pi
GPIO used |
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PIN# |
GPIO |
Functions |
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3 |
GPIO2 |
I2C-SDA,
battery fuel-gauge systems -reading
battery voltage and percentage |
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5 |
GPIO3 |
I2C-SCL,
battery fuel-gauge systems -reading
battery voltage and percentage |
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31 |
GPIO6 |
AC power loss
& power adapter failture detection,
Low-power supply failed, High-power
supply OK |
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36 |
GPIO16 |
Control
battery charging, High-charging
disabled, Low-charging enabled |
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*The UPS connects to the
Pi GPIO via pogo pins, If the I2C address
(0x36) is not detected or failed to read AC
power state or failed to control charging,
please ensure to clear the leads of the pins
used on the GPIO header from the bottom of
the Raspberry Pi PCB and then reinstall it.
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2 |
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Battery voltage
level indicators |
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Battery voltage range (V) |
D1 |
D2 |
D3 |
D4 |
Remark |
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3.87-4.2 |
ON |
ON |
ON |
ON |
discharging levels of 100% |
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3.7-3.87 |
ON |
ON |
ON |
OFF |
discharging levels of 75% |
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3.55-3.7 |
ON |
ON |
OFF |
OFF |
discharging levels of 50% |
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3.4-3.55 |
ON |
OFF |
OFF |
OFF |
discharging levels of 25% |
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Below 3.4 |
OFF |
OFF |
OFF |
OFF |
low battery |
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1 |
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X1209 UPS HAT
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2 |
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Raspberry Pi 5 /4B /3B+ /3B
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3 |
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Power Supply (27W USB-C or
6~18Vdc DC plug 5.5x2.1) |
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4 |
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micro-SD card (≥16GB) x1, not required for eMMC
version |
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5 |
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4.2V rrechargeable lithium-ion battery |
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*
For reliable operation, please use a power adapter
that meets the required specification: either 5V at
5A via the USB-C port, or 6-18V at 3A via the DC
jack. An insufficient power supply will prevent the
system from powering on and may fail to charge the
battery.
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