Hi @bally94
I could not identify the PullUp resistors of the I2C bus.
Check if they exist on your SC16IS750 board or on the SC16IS750 IC datasheet if it has these resistors internally.
If not, you should add these resistors.
PS:
It seems there is:
but the value is too high, use external 10K resistors on each I2C pin. (about 3.6 MOhms)
Ref: RPU pag 43
RV mineirin
