This device combines a 7-color e-paper display with an ESP32 microcontroller and GPS Receiver to display a map of the current location. The e-paper display is very well readable in bright sunlight and therefore ideal for outside use during the day. The energy efficiency of e-paper displays cause this device to last for several days on just one battery charge.
Currently live on twitch https://www.twitch.tv/platinenmacher #firmwaredevelopment