T he ESP32 is a fantastic little microcontroller with a world of possibilities. Its specifications may appear modest, but its capabilities enable it to power all kinds of devices.

Information display can be a challenge, but it’s one that may be made easier by [0xPIT]’s ESParklines library for Espressif processors using the Arduino framework.

Take the ESP32-CAM, a board that started appearing on the market in early 2019. On paper, the thing is amazing: an ESP32 with support for a camera and an SD card, all for less than $10.