MLX90614 works with Uno but not Uno WiFi REV2

[tomb18]

Hi,
I have your examples and libraries running just fine with the UNO but when I try it with the UNO WiFi REV2 board, it does not work.
I have added pull up resistors to the SDL and SDA lines and use these lines for the control.
It reads a constant value and does the same if the two wires are removed. I also ran the I2C scanner sketch and it does see that the device is there.
Suggestions?
Thanks, Tom