Tesberry - A Tesla CAN bus utility for Raspberry Pi

This project is still work in progress

Setup

1. Flash Raspberry Pi OS Lite (32-bit) using the Raspberry Pi Imager with the following settings:
   1. Set hostname to tesberryPi
   2. Enable SSH
   3. Set a username and password
   4. Configure your network and region
2. Start Raspberry Pi and connect via SSH
3. Run bash <(curl -s https://raw.githubusercontent.com/tesberry/tesberry/main/setup.sh) on your Pi

Stack

Service	Enabled	Port	Description
Tesberry UI	true	80	The Web Interface for Tesberry in the Tesla Browser
Tesberry Bridge	true	-	Bridges the CAN Messages to MQTT and decodes/encodes them
Portainer	true	9000	Web Interface to manage the Docker Containers
SavvyCan MQTT Bridge	false	-	Bridges the CAN Messages to MQTT to debug them with SavvyCAN
Mosquitto MQTT Broker	true	1883 / 9001	The MQTT Broker to where all services are communicating through
NodeRED	true	1880	The rule engine to listen to and write CAN messages

Network Setup

There are 2 problems we have to solve:

1. The Tesla does not connect to a WIFI Network without an internet connection
2. The Tesla web browser is locked to only access public IPs, so we cannot use a hostnames or local IP

One way to solve these issues is to setup a mobile 4G/5G router in your car (usually you can use 5V or 12V to power them) and connect your Raspberry Pi to it. Then you have to setup a static IP lease in your Router for your Raspberry Pi to get 192.186.1.42 as it's IP address. After this is done you need to forward port 80 from 42.42.42.42 to 192.186.1.42. Additionally you can setup a hostname like tesberry for 42.42.42.42. Now you can access your tesberry UI with your Tesla browser using http://tesberry/.

Roadmap

• check power state of usb port when sentry mode is off
• speed up boot
• 64-bit support

Read and Write from/to CAN bus

You can pretty much read but not write everything. Some values have a checksum, so it's not possible to write them, but UI values should not have a checksum. To rewrite a value we will read a message in the CAN bus, change a value and immediately send it again. It's also not possible to change configs without doing a man-in-the-middle attack but you can trigger actions instead e.g. opening the frunk.

Helpful Resources

• https://stackoverflow.com/questions/23076806/elm327-can-command-to-switch-headlights-pernament-on
• https://www.goingelectric.de/forum/viewtopic.php?f=99&t=39854&sid=c4d26edbe6332e87b4112fd58f3f4990&start=30
• brendan-w/python-OBD#69
• https://teslaownersonline.com/threads/diagnostic-port-and-data-access.7502/page-102#post-327585
• https://teslaownersonline.com/threads/diagnostic-port-and-data-access.7502/page-90