more documentation please? about motolink HOT 8 OPEN

It's an interface for aftermarket motorcycle (but works for cars too) ECU. It allows for auto mapping while looking for TPS, RPM, AFR and knock.
There's a LIN interface for Hondas, a TTL for Yamaha/Kawasaki, RS232 for the innovate wideband, a CAN interface for some other brands but I haven't tested it (except hardware) so it's unused.
It does not modify the ECU directly as I have no mean to do it.

Keep in mind this is still in early stages.

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Can you please elaborate on CAN firmware capabilities? I am interested to learn more about specific protocols.

Is it untested because you do not have a CAN vehicle to test with? My truck has CAN OBD.

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Right now there is none as my race bike ECU (Honda) does not communicate at all during run, I use signals from the sensors directly. It have plans to test it on a modern Yamaha (MT-10) which uses a specific protocol. I also need to test on OBD CAN. (maybe on a simulator)

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Can you point me at your OBD code?

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As I said it's not there yet (except basic init of the peripheral)
Sadly I don't have CAN on my car...

You can have a look at some other code here: https://github.com/ObdDiag-Net/allpro/blob/master/src/adapter/obd/isocan.cpp
https://github.com/brendan-w/python-OBD/blob/master/obd/protocols/protocol_can.py
https://en.wikipedia.org/wiki/OBD-II_PIDs#CAN_.2811-bit.29_bus_format

It's mostly a matter of setting the CAN filters, sending PIDs an reading the answer, it should be easy.

This might help:
http://www.chibios.com/forum/viewtopic.php?t=1695

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Thank you! Will check these links.

PS: just to be pedantic - the way I read it sounded as "not tested".

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You're welcome!

I'll add some code for the CAN protocols soon but I have no way to test it on a car, I also need to get an adapter to reverse engineer Yamaha's protocol.

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I added some basic canbus code here if you want to check.
https://github.com/fpoussin/MotoLink/blob/master/code/app/canbus.c

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