The SensorData and SensorNode support I2C peripherals, such as Digital Matter Temperature Probes, and Temperature/Humidity Sensors
The SensorData and SensorNode expose 4 screw terminals for I2C, these are marked on the board.
- 3.3V: provides power to the sensor at 3.3V
- SDA: I2C data line.
- SCL: I2C clock line.
- GND: ground connection to the sensor.
Below are the pin outs for the wiring of Digital Matter sensors.
DM Temperature/Humidity Sensor
- Red = Positive - connect to 3.3V
- Brown = Clock - connect to SCL
- Green = Data - connect to SDA
- Black = Ground - connect to GND
- Purple = Not used
- Orange = Not used
DM Temperature/Humidity Sensor wired to SensorData
DM Temperature Probe
- Red = Positive - connect to 3.3V
- Brown = Clock - connect to SCL
- Orange = Data - connect to SDA
- Black = Ground - connect to GND
New DM Temp Sensor:
In 2018 we introduced a new temperature sensor that allows you to set the address to Address 1 or Address 2:
- Address 1 (DM Temp Sensor 2): Green - connect to 3.3V
- Address 2 (DM Temp Sensor 1): Green - connect to ground
- The rest of the wiring stays the same
DM Temp Probe wired to SensorData
