Inkplate 10 touchpads not responding and generating spurious signals

TECHNICAL SUPPORT Inkplate
1

Customer:

I recently bought an Inkplate 10 and the touch pads are not working. I’ve recorded a video to illustrate the problem: https://www.youtube.com/watch?v=pV8COkQouPc (the horizontal stripe in the video is just an LED strip reflecting, not a device issue).

The Inkplate is running the Inkplate_Touchpads example sketch from the Inkplate library. The panels seem to have no effect, while the program itself seems to react to spurious signals. The counter occasionally drops to -1, which suggests either both outer pads or all three are generating input signals on their own.

Two questions: Is this a known issue? And are the big numbers supposed to be on the front side of the pads? I’ve seen some photos with those numbers on the back.

Also, I’m having an issue with waveforms. Of the three provided in the software library, none does a good job rendering grayscale in order. Could you tell if there are other waveform definitions I could try?

Originally submitted via email support on 26 November 2022. Migrated to the forum for community visibility.

2

Soldered Support:

The touch pads are capacitive, so there is the possibility that they are charged and you need to discharge them. You can do this by touching the touch pads with one hand and with the other hand touching the top of the ESP32. It is important that the Inkplate is turned off when you do this. The numbers on the front side are normal.

Unfortunately, there are no additional waveforms available currently, but new ones are being developed and will be available in the future.