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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 |
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 |
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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 |
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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Required hardware |
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