ESP32 Forum

Hi Guys,
I have been working on my own custom esp32-s3 epaper watch. I have manged to get it all working know apart from the I2C bus. I'm not sure why it is not working. I am using Arduino ide to program with the ESP32-s3 Dev board.
I have tried to initiate all the sensors using normal wire and twowire. Tried using multiple different I2C scanners but they all say that no devices found. Schematics and PCB below.

If anyone has any ideas on how to fix it then help would be great. Thanks.

Can you use a scope or LA to look at the signals on the I2C pins?

ESP_Sprite wrote: ↑

Sat Sep 17, 2022 1:26 am

Can you use a scope or LA to look at the signals on the I2C pins?

Hi,
Thanks for your reply. I don't actually have one. Do you know of any cheap ones I can get just for this use?
Would a picoscope work? "https://www.picotech.com/oscilloscope/2 ... 0-overview" as i have used these in college and they seemed to be decent.
Thanks, Tom

https://www.google.com/search?q=saleae+clone+8+channels
Some are under $10 and should be enough for I2C and other slow speed protocols (<10MHz).

chegewara wrote: ↑

Sat Sep 17, 2022 1:05 pm

https://www.google.com/search?q=saleae+clone+8+channels
Some are under $10 and should be enough for I2C and other slow speed protocols (<10MHz).

Ahh ok thanks i will order one so i can test the I2C.