X1202-v1.1 Hardware & Installation

Hardware Description

1. Raspberry Pi GPIO Used

PIN# | GPIO | Functions

3 | GPIO2 | I2C-SDA, battery fuel-gauge systems - reading battery voltage and percentage

5 | GPIO3 | I2C-SCL, battery fuel-gauge systems - reading battery voltage and percentage

31 | GPIO6 | AC power loss & power adapter failure detection, Low-power supply failed, High-power supply OK

36 | GPIO16 | Control battery charging, High-charging disabled, Low-charging enabled

*The UPS connects to the Pi GPIO via pogo pins. If the I2C address (0x36) is not detected or fails to read AC power state or 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.

2. Battery Voltage Level Indicators

Battery Voltage Range (V) | D1 | D2 | D3 | D4 | Remark

3.87-4.2 | ON | ON | ON | ON | Discharging levels of 100%

3.7-3.87 | ON | ON | ON | OFF | Discharging levels of 75%

3.55-3.7 | ON | ON | OFF | OFF | Discharging levels of 50%

3.4-3.55 | ON | OFF | OFF | OFF | Discharging levels of 25%

Below 3.4 | OFF | OFF | OFF | OFF | Low battery

Required Hardware

• X1202 UPS Shield
• Raspberry Pi 5 Model B
• 18650 battery 2~4pcs
• Power Supply (27W USB-C or 6~18Vdc DC plug 5.5x2.1)

Hardware Installation

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