Hello guys, I am using an arduino uno with a raspberry pi to run whats called raspberry pints which displays and monitors beers in my kegerator. The arduino is connected to flow meters wich shows how much beer Ive poured each time.
My problem is it works fine for a few months then fails on a daily basis.
I will reupload the sketch and it works again but then fails the next day with the following error message
[Errno 2] could not open port /dev/ttyACM0: [Errno 2] No such file or directory: '/dev/ttyACM0'
Ive tried 2 Uno now and they are fine for a month or two then start to fail. They are connected to a 9v 400ma power supply but I did just buy a 9v 1a power supply and waiting for it to arrive via eBay.
If I re upload the sketch and hit the reset button on the arduino it starts working again but usually the next afternoon it has stopped with the above error.
Any ideas why it keeps disconnecting? Im thinking of buying yet another arduino uno and running it with a 12V 4a power supply I have at least until my 9v gets here.