Felix; thanks for the tip in the Grove pinout; exactly where I was stuck after experimenting.

Hi Van If you like to experiment there is a magnetometer BMM150 in M5Core Gray, Fire and M5GO. Also the M5StickC ENV Hat contains the same BMM150. But I guess you already knew that. Cheers Felix

Hi Van thank you for the test application. I've added my test (using a finger) in the issues section. I think I have a stylus somewhere and when I find it I'll give it another go. Cheers Felix

Hello Van sounds like a plan - thank you. Glad to help out. Cheers Felix P.S. I am very sorry for misspelling your name previously (fixed now).

Wow! I was looking for a pocket calculator for my twelve year old. I had an m5stack faces laying around, flashed with RunCPM, but unusable for me because of the tiny font it uses. So, thank you for making this available.

I followed up on this project with another that's a real calculator. It was more work than I had anticipated; that might explain why there are so few examples: https://github.com/vkichline/FullCalculator-Arduino The README includes pictures this time.

Really cool and we’ll documented. Being new to UIFLOW, is there a way to get that code into UIFlOW to play with it? Is there a .m5f I’m not seeing? Thanks, Paul