Hi I'm trying to set up a Multiple Fermentation Chamber system. When i try the ls /dev/ttyACM* command I get no such file or directory. I've done a lot of searching but cant find the answer to my problems. I have cheap unos from ebay.
Could you provide a link to the "Uno" you bought?
Obviously, simply "pinging" the USB root ports for attached devices is pretty basic functionality. Even with a dodgy power scheme (eg: relying on the USB port to power the Uno) the thing should at least cough up an ACK.
Perhaps it'd be worth plugging something known to work into the host USB ports just to make sure they work?
Cheers!