I had an arduino knock off working with my Pi2 for a while, but just upgraded to a Pi3, as my Pi2 needed to be re-purposed. This meant that I needed to do a whole new build.
Anyway, long story short, I can’t get the link between the web interface and the arduino script to work.
I can program the arduino, I can read devices, but I can’t access stderr.txt or stdout.txt, the graph doesn’t show up, and the “start script” button doesn’t even show up.
I have searched for hours, but I haven’t come up with anything.
My config.php is as follows:
wwwPath = /var/www/html
port = /dev/ttyUSB0
altport = /dev/ttyUSB1
Here are a few screen shots: