Pi, USB Hub and Arduinos

I’m trying to setup a multiple fermentation chamber using www.instructables.com/id/Multiple-Fermentation-Chamber-Control-with-BrewPi/step3/Writing-the-UDEV-rules-for-Raspberry-Pi/ hehe but I’m stuck at the first hurdle!!!

I can get the Pi to recognize a single Arduino plugged directly into the pi. ls /dev/tty* I can then find ttyACM0 but with the USB hub connected ttyACM0 doesn’t display. The USB hub works (lights on) and show up with lsusb (Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub)

Any advice??

zombie thread, but were you using a powered hub? I ran into the same problem, but then realized that the power draw from my unpowered hub was probably causing the problem.