I made a pomodoro timer display using a WiFi-connected ESP32 board with a small OLED display. I put it outside the guest bedroom/home office door during lockdown so my family members could see how long until I could be disturbed.
It talked to my laptop using MQTT and of course it was triggered from emacs using org-pomodoro.
It talked to my laptop using MQTT and of course it was triggered from emacs using org-pomodoro.