Main Unit Sensors connector
1 | 2 | 2 | 4 | 5 | |
|---|---|---|---|---|---|
| 1 | NC | NC | 3.3v | GND | NC |
| 1 | SCL | SDA | 5v | GND | RST |
3-rd board to Main Unit connector
1 | 2 | 3 | 4 | 5 | |
|---|---|---|---|---|---|
| 1 | 5v | GND | SDA | SCL | RST |
| 2 | 3.3v | GND | NC | NC | NC |
3-rd to 2-nd board connector
1 | 2 | 3 | 4 | 5 | |
|---|---|---|---|---|---|
| 1 | 5v | GND | SDA | SCL | RST |
| 2 | 3.3v | GND | SDA | SCL | RST |
2-nd board external connectors
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | GND | 3.3v | RST | SCL | SDA | SDA | SCL | RST | 5v | GND |
| 2 | GND | 3.3v | RST | SCL | SDA | SDA | SCL | RST | 5v | GND |