CANHack.org

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.

I have a project (which some of you have PM'd me on) to be able to 'create' your own CAN-B Bus inside a vehicle that does not have it. I am using an Arduino (Teensy) based solution, and a custom PC Board. Works like a champ! I am using a Chrysler MyGIG RHR radio, and despite it working properly, inc...

Well, for whatever reason, the RHR decided to behave, now. So, disregard my last request. Now if I could just figure out a 'Clock Fix' for the RHR, like there is for the RER/REN, then I would be styling

BTW, feeding it the 0x01C8 headlamp information, as well, does nothing to change this.

I have most of my Teensy project working. I can control the RER radio beautifully on the bench. The RHR radio seems to be more challenging. I can run everything except dimming the screen. From older cars, you can find that sniffing ID 0x0210 is the command set for the instrument lights, and using th...