Tell us about yourself!
See my variant on the Geiger Watch: https://github.com/wfdudley/T-watch-2020It has a weather app, and many many more.
There is something wrong with your serial port, or you haven't got the right one selected, or your serial port driver is faulty.
Download an updated version of the source. I inadvertantly broke compiles during an update. It's been fixedfor a few days now.
I've added more apps to my watch code: a Mandelbrot explorer, and a calendar.
see my code here: https://github.com/wfdudley/T-watch-2020
I added Conway's game of life. https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life
Dan,Thanks for your kind comment. I just added a scientific reverse Polish calculator. I'll upload the changes soon. Gotta go fix my car, first.
Dan, thanks a lot for your efforts. It's a great starting point for watch code. I've taken your code, and expanded/rewritten much of it. I've got sleep working, including wake on alarm. I've added gesture recognition (the touch sensor says it does this, but it doesn't.) Other functions: get time from NTP; connect to any one multiple WiFi access points; a simple "solve the maze" game; an MQTT client; an "analog" watch face (in addition to modifiedversions of your two watch faces); settings dialogs using LVGL. My fork is here:https://github.com/wfdudley/T-watch-2020