LattePanda 2 Delta 432 Touch Not Working

Hi Support

We purchased a LattePanda 2 Delta 432 with 7"eDP Touch Display (see below). We followed the instructions given on the DFRobot website, and the display works great, images are excellent, but the touch feature does not work at all

https://www.dfrobot.com/product-1853.html

I have tried to update the GoodIX Touch driver as well, but that did not work either. Would you have any suggestions?

Regards

Arif