Successfully built the Bittle and was able to control it via the USB serial port. Purchased a Raspberry Pi 3 and installed it per the instructions. Unfortunately, that's as far as I can get as the documentation regarding using the raspberry pi has been a bunch of broken links. The Petroi Instructions reference this document https://www.raspberrypi.org/documentation/configuration/uart.md , but I cannot seem to get it to communicate. I've downloaded the OpenCat package and modified the ardSerial.py script to address /dev/ttyS0 I get the error: Traceback (most recent call last): File "./ardSerial.py", line 14, in <module> timeout=1 File "/usr/lib/python2.7/dist-packages/serial/serialutil.py", line 240, in __init__ self.open() File "/usr/lib/python2.7/dist-packages/serial/serialposix.py", line 272, in open self._reconfigure_port(force_update=True) File "/usr/lib/python2.7/dist-packages/serial/serialposix.py", line 326, in _reconfigure_port raise SerialException("Could not configure port: {}".format(msg)) serial.serialutil.SerialException: Could not configure port: (5, 'Input/output error') Any help would be greatly appreciated. A step by step document would be helpful as all I can find are articles that give vague references to other articles (most which have broken links). I have the Raspberry Pi installed. Enabled the UARTS and disabled the serial console as per the instructions. DId I miss something really important in the documents? What now?