DM produces I2C temperature probes. These can be connected to the Flexi 1 to read temperature at regular intervals.


The Flexi 1 exposes 4 screw terminals for I2C:

  • 3.3V: provides power to the sensor at 3.3V. The current limit is 500mA.
  • SDA: I2C data line.
  • SCL: I2C clock line.
  • GND: ground connection to the sensor.


DM temperature probes use the following wiring colours:

  • 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 2 or Address 4:

  • Address 2 (DM Temp Sensor 2): Green - connect to 3.3V
  • Address 4 (DM Temp Sensor 4): Green - connect to ground
  • The rest of the wiring stays the same.


The Flexi 1 needs to be configured on the OEM Server to use the temperature sensor. This is done in the system parameters:

  • Add the temperature sensor param section. Add the section corresponding to the colour of the sensor that you have:
    • RED Digital Matter sensor: If using a red sensor, add Temp Sensor 2 Tab:
    • BLUE Digital Matter sensor: If using a blue sensor, add Temp Sensor 4 Tab:
  • Both red and blue can be used at the same time. You can use 1 red and 1 blue. You cannot use 2 blue or 2 red.
  • Also remember to setup the sensor reading in the Task setup.