| ESP32 IO PIN | Function | BME680 | BQ27441 | MH-Z19B | ADXL345 | Comment |
|---|---|---|---|---|---|---|
| 13 | Application PB 1 | N/A | N/A | N/A | Pull down push button | |
| 17 | LED Green | N/A | N/A | N/A | LED | |
| 16 | LED RED | N/A | N/A | N/A. | LED | |
| 32 | SCL | PAD 4 | PIN 2 | N/A. | PIN14 | I2C |
| 33 | SDA | PAD 3 | PIN 1 | N/A. | PIN13 | I2C |
| 25 | RX (UART1) | N/A | N/A. | RX | RX | |
| 26 | TX (UART1) | N/A | N/A. | TX | TX | |
| 21 | GPOUT | N/A | PIN 12 | N/A. | This open-drain output can be configured to indicate BAT_LOW | |
| 22 | LED Charge | |||||
| 23 | Led Power | |||||
| 24 | Charger status | |||||
| 36 | ADC1 CH0 | Mic | ||||
| 18 | INT ACC | |||||
| 19 | INT ACC | |||||
| Break-out remove | ||||||
| 6 | SPI flash | Remove | ||||
| 7 | SPI flash | Remove | ||||
| 8 | SPI flash | Remove | ||||
| 9 | SPI flash | Remove | ||||
| 10 | SPI flash | Remove | ||||
| 11 | SPI flash | Remove | ||||
| 1 | UART0 TX | Remove | ||||
| 3 | UART0 RX | Remove | ||||
| 15 | LED Green | |||||
| 16 | LED RED | |||||
| 12 | boot fail if pulled high | Remove | ||||
| 0 | outputs PWM signal at boot | |||||
Last active
September 23, 2020 18:31
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