Activity Forums Questions & Troubleshooting I2C comunication wit Controllino Mini

  • I2C comunication wit Controllino Mini

     robbert updated 2 years ago 1 Member · 2 Posts
  • robbert

    Member
    May 14, 2022 at 9:34 am

    Hi,

    I’m trying to get I2C communication between ESP32 and Controllino MINI, using Controllino as Slave.

    The little test code I made is working fine when I run it between 2 ESP32’s.

    ESP32 is running on 3.3V and controllino on 5V, so I have used a bidirectional logic level converter when connecting ESP32 to Controllino MINI.

    I can send data from ESP32 to the MINI without any problem.

    When I request data from the MINI, the request is sent to the MINI correctly, but the response does not arrive at the ESP32. (Wire.requestFrom returns 0)

    Any clues?

    Robbert

  • robbert

    Member
    May 14, 2022 at 10:35 am

    I forgot to mention: when I use the controllino as I2C master, it works fine but that is not what I need, unfortunately.

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