Scripts decoding Peloton ride communications

See the accompanying blog post at https://ihaque.org/posts/2020/10/15/pelomon-part-i-decoding-peloton/.

Code:

• decoder_plots.py contains some simple plots to visualize the dump of an example ride to understand the structure of the Peloton data.
• decode_resistance.py contains plots to illustrate how resistance is normalized for the Peloton.
• peloton.py contains a module to parse a bytestream of binary communications between the Peloton HU and Bike into more useful structures.

Data:

• example-ride.txt contains a dump of messages observed from the bike during the course of an example ride, in text hex form, aligned by message.
• resistance-stepped-10s.bin contains a binary dump of all messages between the head unit and bike during a test ride in which I stepped the resistance in discrete chunks.
• resistance-stepped-10a.sr - Sigrok/PulseView session file for the above ride. Not used in the scripts but provided in case you'd like to load a trace into PulseView to see what it looks like.