mike-ady
commented
2 years ago I am no expert, but a quick search through the TWatch library source code did not reveal any obvious calibration routines. The library appears to support capacitive touch sensors made by FocalTech. I viewed a couple of the pertinent FocalTech datasheets, and the sensors appear to be self-calibrating.
Sometimes it's hard to tell what is going on on such a small display. You could try downloading Dan Geiger's TWatch framework. It includes a touch app, that displays the touch location. I find that if I lightly touch the display and drag my finger tip slowly to one of the edges, I can get within a few counts of the limits, (0 or 239). You can find Dan's code on Instructables, here:
https://www.instructables.com/Lilygo-T-Watch-2020-Arduino-Framework/
Be warned, that Dan's touch app times out and returns to the main time display if you don't touch the display within 5 seconds.
RichFind
Hello, my T watch 2020 v2 seems to need touchscreen calibration, for example to activate the corner buttons I always need to press to their right or left, but if I click right on them nothing happens except a vibration.
Is there a way to calibrate it or should I return my watch?