Hi.

You can define other I2C pins other than 21 and 22.

However, I wouldn’t recommend the pins you are referring. Those are strapping pins, which means that depending on your code, if you use them for I2C, you may get unexpected results when the ESP32 boots or resets.

But you can always try and see if you get weird behavior.

You can assign any two pins as SDA/SCL using Wire.begin(SDA,SCL)

Regards,

Sara

ok will have a try what are the best 2 pins? other than 21 and 22 ?

Hi.
GPIO 33 and 32 are good options.
You can also check this link: https://espeasy.readthedocs.io/en/latest/Reference/GPIO.html
And scroll down to the ESP32 table to check the best pins to use.
I hope it helps.

Hi Nope 33 and 32 dont work tried diff addresess
what works are 04 05 at 0X76

Ok.
I’m glad it is working.
Thank you for letting me know.
Regards,
Sara