X1200 Hardware

Interface Schematic

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 failture detection, Low-power supply failed, High-power supply OK
36	GPIO16	Control battery charging, High-charging disabled, Low-charging enabled

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

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Anonymous user #1

6 months ago

Score 0

What is the low-charging rate? What is the high-charging rate?

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