Given how ubiquitous the capacitive touch senors have become I'm surprised no one has put together an open source option. I've gone down something of a rabbit hole searching and haven't found any prior work.
The closest I have seen is the Snowpad[1] but it's been discontinued by the maker and they pulled down the source as well.
I'd try duplicating it but it used the Microchip MTCH6301 and it's been marked `Not recommended for use in new designs.` I'm hunting for an easy to use alternative if anyone knows one. I may still take a stab at the MTCH6301 just because of how easy it looks to use.
The closest I have seen is the Snowpad[1] but it's been discontinued by the maker and they pulled down the source as well.
I'd try duplicating it but it used the Microchip MTCH6301 and it's been marked `Not recommended for use in new designs.` I'm hunting for an easy to use alternative if anyone knows one. I may still take a stab at the MTCH6301 just because of how easy it looks to use.
[1][https://www.kitronyx.com/snowpad.html]