CANHack.org

I have previously worked quite a bit on a project to decode a lot of IDs on a Chrysler CAN-B bus, to interface RER and RHR radios into cars without a CAN Bus. That was successful, so time to kick it up a notch! About to perform an engine swap on a Chrysler Crossfire. Crossfire uses exclusively a CAN...

So, I have used both the RER, and currently have a RHR in my 2005 SRT-4. The logo is from the stored VIN. Depending on what VIN your software sends the radio, different logos will come up, including VW, if you send it a VIN for one! Timing on the VIN is a bit tricky, and it does repeat pretty regula...

That is a super-cool project!

Nice! I have been using my Teensy 3.2 based setup for more than two years, but your setup offers the advantage of not needing to build much, if any, custom hardware.

You're going to need to take a step back and first get immersed in RPi and/or Arduino before tackling this subject. This is definitely not a beginner's project that you are talking about.

I am not using the shield, but I did a project using a Teensy 3.2 (and Teensyduino), and it runs 83.3k without issue. Teensy has CAN capabilities built in. Still need the CAN interface chip, but the protocol is already there.

Unsure why you need to send the 0x4xx commands. Just need to send the power command about every 100ms. That is all I needed to do for REC, RER or RHR.

BTW, the 2010 Patriot should be LOW speed, or 83.3k.

poop713 wrote: ↑2018 Mar 01 20:29 More likely 500k baud.
The data your seeingn is extended frame format.

Not if he is on the 'radio' (interior, CAN-B) bus.

If you are in to the radio bus, believe that would be CAN-B bus. For your model, I would suspect the speed to be 83.3k, but it may possibly be 125k. It is almost certainly not 1M, and it is definitely not 10k.

No, this is a hardware requirement to use 120ohm termination resistors. Read up on CAN bus hardware, and you will find it.

Your CAN module and the radio MUST share a ground, or it will not work. If after this it is still not working, look at your bus loading resistors, and see if you need to add/remove them.

Increase your rate. Message needs to be sent every 100ms. Also, if your bus is not properly loaded, or the CAN board is not sharing a ground with the radio, it will not work right.

Disregard earlier comments. OK, found where the radio sends the data out (provided it has a GPS Signal, have not tested on a 2009+ radio from a "time dependent " system). 2008 down cars do not have a clock module in the vehicle's systems, hence clock issues when you install a later model REN/RER/RHR...

Well, found where the car is sending the time to the radio:

id 0x03EC, msg length 03,

byte 0: Hour
byte 1: minutes
byte 2: seconds



I spoofed some values, and sure enough, it displays it. What I am not finding yet is where the radio is updating the car, via GPS.