CAN-BUS Information request

[SPlatten]

I am working on a project which I hope will be loved by all Tesla owners, I am an experience software engineer and am would like to add a new add on to my Tesla Model 3, before I can say what it is, I am trying to identify the message(s) that contain left / right signal indication, in addition to these I would also like to know if reverse is active and if the brakes are being used.

I have already purchased several cables and a USB CAN-BUS module, I can sniff the traffic from my car and share it over my WiFi network with my MAC.

Thank you for any help I receive.

 

[SPlatten]

A little more information:
I bought the following from AliExpress:

https://www.aliexpress.com/item/1005003444594756.html?spm=a2g0o.order_list.order_list_main.11.73901802Zo28IJ

https://www.aliexpress.com/item/1005006032351087.html?spm=a2g0o.order_list.order_list_main.35.73901802Zo28IJ

https://www.aliexpress.com/item/1005005281748409.html?spm=a2g0o.order_list.order_list_main.5.73901802Zo28IJ

I connected all of these to a Raspberry Pi 0 W and shared the USB over my WiFi network.

 

[SPlatten]

There are the connections to make up a cable:

 

[SPlatten]

I know to CANBUS connectors in the Tesla Model 3, the one I connected to is situate behind and between the front seats in the centre console. Are they're any other CANBUS connectors in the rear of the car where I would be able to sniff the information I'm not seeing?

 

[mpgxsvcd]

I know to CANBUS connectors in the Tesla Model 3, the one I connected to is situate behind and between the front seats in the centre console. Are they're any other CANBUS connectors in the rear of the car where I would be able to sniff the information I'm not seeing?

Front Passenger footwell on the right side gives the most data. I have a couple of devices daisy chained there and it works well.

 

[SPlatten]

Front Passenger footwell on the right side gives the most data. I have a couple of devices daisy chained there and it works well.

Thank you, I will give it a look, any videos of guides on how to access it ?

 

[SPlatten]

BY THE WAY, I am in the UK, Passenger is on the Left...

 

[SPlatten]

Found message 0x3E2 Hex 994 decimal, this looks like it has everything I am looking for.

 

[mpgxsvcd]

Thank you, I will give it a look, any videos of guides on how to access it ?

 

[SPlatten]

Is there an access point in the boot of the car?

 

[gearchruncher]

There are lots of projects out there working with the Tesla CAN bus data.

There is a DBC file which defines much of the data which was worked on by volunteers: GitHub - joshwardell/model3dbc: DBC file for Tesla Model 3 CAN messages

There's an Open source app for Android- CANDASH, which you can look at the code for and get tons of information: GitHub - nmullaney/candash: A simple Android app that turns your phone into an instrument cluster for your Tesla Model 3 and Y

Whatever you are looking to do has probably been done.

 

[SPlatten]

Thank you.