| Unused |
| Reserved for I2C Sensors |
| Reserved for I2C Sensors |
| Unused |
| Unused |
| Unused |
| Unused |
| Unused |
| Unused |
| Unused |
| Unused |
| Unused |
| Unused |
| Unused |
| Unused |
| Unused |
| Unused |
| Reserved I2S |
| Unused |
| Unused |
|
| 3.3 VDC Power |
| GPIO 2 I2C |
| GPIO 3 I2C |
| GPIO 4 |
| Ground |
| GPIO 17 |
| GPIO 27 |
| GPIO 22 |
| 3.3 VDC Power |
| GPIO 10 |
| GPIO 9 |
| GPIO 11 |
| Ground |
| I2C EEPROM ID_SD |
| GPIO 5 |
| GPIO 6 |
| GPIO 13 |
| GPIO 19 PCM_FS |
| GPIO 26 |
| Ground |
|
| 1 | 2 |
| 3 | 4 |
| 5 | 6 |
| 7 | 8 |
| 9 | 10 |
| 11 | 12 |
| 13 | 14 |
| 15 | 16 |
| 17 | 18 |
| 19 | 20 |
| 21 | 22 |
| 23 | 24 |
| 25 | 26 |
| 27 | 28 |
| 29 | 30 |
| 31 | 32 |
| 33 | 34 |
| 35 | 36 |
| 37 | 38 |
| 39 | 40 |
|
| 5 VDC Power |
| 5 VDC Power |
| Ground |
| TXDO GPIO 14 |
| RXDO GPIO 15 |
| GPIO 18 PCM_CLK |
| Ground |
| GPIO 23 |
| GPIO 24 |
| Ground |
| GPIO 25 |
| GPIO 8 |
| GPIO 7 |
| I2C ID_SC EEPROM |
| Ground |
| GPIO 12 |
| Ground |
| GPIO 16 |
| GPIO 20 PCM_DIN |
| GPIO 21 |
|
| Reserved Power HX711 |
| Reserved Power |
| Reserved Ground |
| Reserved serial console |
| Reserved serial console |
| Reserved I2S |
| Unused |
| Reserved HX711 |
| Reserved HX711 |
| Reserved HX711 |
| Unused |
| Unused |
| Unused |
| Unused |
| Unused |
| Unused |
| Unused |
| Unused |
| Reserved I2S |
| Reserved I2S |
|
