Activity › Forums › Questions & Troubleshooting › Software & Firmware › INPUT_PULLUP not supported? › Reply To: INPUT_PULLUP not supported?

  • mr-controllino

    Administrator
    March 20, 2019 at 7:56 am

    Hello Danny,

    Yes the screw terminal Inputs are all forced to ground by the voltage divider.

    If you need a screw terminal input to be pulled up … you can us an external pullup resistor … 10k for example.

    If you need a 5V pin … I would recommend to use one of the not used communication pins like I2C, RX/TX 2, /SS, … or also the digital outputs D0, D1, Dx (of course the screw output will then switch accordingly, but if you don’t use it, it does not matter) … these pins are not tied to GND and you can use the internal Pullup.

    regards

    Marco

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