Also, I was going to take a look at the code since it’s open-source and see if anything jumped out at me to consider experimenting with modifications, but the sketch file does not appear to be included in the download I was able to make work–I’m only seeing the hex binaries and README as with the OP. I’m not sure what your notification system is like, so I’m also going to copy a link of this thread to info /at\ zdl.