We start by connecting the Grow r503 (Pro) to the RP2040 Pico W with the following pinout.
| # | Sensor Wire Color | Function | PIN# | Pin Name |
|---|---|---|---|---|
| 1 | Power | 36 | ||
| 2 | Ground | 38 | ||
| 3 | TX (Out) | 21 | ||
| 4 | RX (In) | 22 | ||
| 5 | Wakeup | 24 | ||
| 6 | Touch | 36 |
| # | Sensor Wire Color | Function | PIN# | Pin Name |
|---|---|---|---|---|
| 1 | Power | 3V3 | ||
| 2 | Ground | GND | ||
| 3 | TX (Out) | 14 | ||
| 4 | RX (In) | 15 | ||
| 5 | Wakeup | 4 | ||
| 6 | Touch | 3V3 |