I have the Sparkfun Single Channel Gateway working OK but want to add an 1.3 " I2C OLED. In the ESP-sc-gway…ino under the Oled.h tab both the SDA and SCL pin numbers need to be defined. I couldn’t find where these were defined and after looking at the I/O pin chart I used Pin 2 for SDA and Pin 3 for SCL. The sketch uploads OK but so far I can’t get the OLED to work.
Does anyone know if these are the right pin numbers ? Or any other reason why the OLED doesn’t work ?
Hey GaryT,
Welcome to the forum, do you have a picture of your setup?
Also, do you have the datasheets or parts number of the product involve in the project?
This could help to figure out if everything is wire as it should or if it’s a software error.
Thanks!