I2C comunication wit Controllino Mini

[robbert]

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]

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