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https://carltonbale.com/shimano-di2-everything-you-need-to-know/#canbus_protocol
I’m going to have to play with one of these junctions I bought aren’t I…
yeahdext
@kiskubai
Once again I mention that I vividly remember reading a blog post from a guy who actually managed to reverse engineer the canbus signals of 11sp di2, and started making his own PCB-s to control the derailleurs. He wanted to sell them.
I reckon that last bit is why its been scrubbed clean from the internet, and for the life of me I cannot find it anywhere.