OLED debugging screen

I don't know any DIY project that a tiny OLED screen won't improve :)

The SSD1306 uses IC2 bus so it only needs two ESP GPIO.

I've used it to display variables during experimentations, like the computed position from the pressure sensor level, and settings such as the offset and thresholds used in the computation (which can be modified through one of the available applications)

There is literally no other component needed, you can plug it directly to the ESP32 GPIOs (internal pullups on SCL and SDA are enough) and power it with 3V3. The resistors on the picture are the ones used for the pressure sensor.