Demo example for Olimex ESP32-EVB (revision D) with Olimex MOD-OLED-128x64 connected to the UEXT.
Used I2C-1 for communication between the host board and the module. More comments can be found in main.c.
After programming on the screen you will see a welcome message. When you click the button BUT1, a counter will appear on the screen. The setup looks like this:
Stanimir Petev 2018/03/22