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Topics created by czm8

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Touch doesn't work properly on bat power , but ok on USB power - T-Display S3 Pro
Technical Discussion • • czm8

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I just wanted to give an update. I have recreated the problem I was seeing before - this time using the "CapacitiveTouch" example provided by LilyGo on their GITHUB page meaning I can rule out anyting in my code as being a problem.
linked here...

Again, the problem is a follows, when the unit is powered from the USB port, it recognizes all touches on the screen without any problems. When the USB power is removed and the unit is powered by the internal battery it sometimes works and sometimes doesn't recognize the touches on the screen. This makes the T Display S3 Pro unusable for me as a battery powered, portable device.

My question is: Do I have a faulty unit or is there some kind on inherent design problem that effects every one of them?

Thank you!
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T-Display S3 Pro - battery charging?
Technical Discussion • • czm8

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The flashing red light is the battery charger IC status light.
Your board uses an uncommon, but apparently sophisticated charge IC, so I can only speculate.
The only possible states are OFF, flashing at different rates or ON.
You should learn what the light means through observation.

The other LilyGO boards with different LED indicators do something similar.

-Terry