M5Stack ATOM Lite + Unit HEX | Tiny ESP32 RGB Demo. While moving, I found this tiny M5Stack ATOM Lite that I had completely forgotten about. It is a miniature ESP32 board with Wi-Fi, an RGB LED, a button, an infrared transmitter, and a Grove connector — all packed into a 24-millimeter case. I recently used this Unit HEX in another project, so I connected it to the ATOM Lite and wrote a quick test with five lighting effects. The built-in button switches between solid colors, rainbow, and breathing animations. Of course, it did not work immediately. I first used GPIO32 and only one random LED lit up. After switching the data line to GPIO26, all 37 LEDs started working correctly.#esp32 #arduinouno #diy #m5stack #atomlite