Thank you all very much for your help. I was able to get it working using Firmata as Stewart suggested.

Sorry DirkS forgot that part. /dev/tty /dev/tty19 /dev/tty3 /dev/tty40 /dev/tty51 /dev/tty62 /dev/tty0 /dev/tty2 /dev/tty30 /dev/tty41 /dev/tty52 /dev/tty63 /dev/tty1 /dev/tty20 /dev/tty31 /dev/tty42 /dev/tty53 /dev/tty7 /dev/tty10 /dev/tty21 /dev/tty32 /dev/tty43 /dev/tty54 /dev/tty8 /dev/tty11 /de...

lsusb outputs the following:

Using connection = SerialManager() I get the same output as I do using dev = '/dev/ttyACM0' and connection = SerialManager(device=dev, baudrate=baud)

With that I get the output: starting Traceback (most recent call last): File "nanpy_test.py", line 10, in <module> a = ArduinoApi(connection=connection) File "build/bdist.linux-armv6l/egg/nanpy/classinfo.py", line 22, in getinstance File "build/bdist.linux-armv6l/egg/nanpy/classinfo.py", line 59, in...

The Arduino is connected to the RPi by USB. When the program is run the 'L' LED will flash a bit and the RX light will blink once very briefly but the program will never display anything after the "starting" print statement.

I'm trying to interface with an Arduino using Nanpy and the program always gets stuck at this line: a = ArduinoApi(connection=connection) When I press control-C I get the following output: Traceback (most recent call last): File "nanpy_test.py", line 10, in <module> a = ArduinoApi(connection=connect...