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