Table 2.
Connections for the tipping bucket and SDI-12 wires to the Feather Doubler board and Hypnos board.
| Sensor | Sensor wire color | Board pin |
|---|---|---|
| Tipping bucket | Black | Feather Doubler: GND |
| Tipping bucket | White | Feather Doubler: Pin 0 |
| MMA8451 Accelerometer | GND (brown) | Feather Doubler: GND |
| MMA8451 Accelerometer | 3.3 V (red) | Feather Doubler: 3.3 V |
| MMA8451 Accelerometer | I2 (orange) | Feather Doubler: Pin 1 |
| MMA8451 Accelerometer | SCL (yellow) | Feather Doubler: SCL (Pin 21) |
| MMA8451 Accelerometer | SDA (green) | Feather Doubler: SDA (Pin 20) |
| SDI-12 | Black | Feather Doubler: GND |
| SDI-12 | Red | Hypnos: 3.3 V rail |
| SDI-12 | Blue | Feather Doubler: Pin 11 |