This is an excerpt from a chapter in Günter Spanner’s book MicroPython for Microcontrollers (Elektor 2021). The material reproduced here covers the successful union of the popular ESP32 microcontroller board with the SSD1306 OLED using the MicroPython programming language. Discover the power and ease of use of MicroPython and get to programming as well as prototyping an ECG display and a digital clock.