Raspberry Pi Zero as CAN Logger for Tesla Model 3. The CAN data is stored offline on the Pi's SD card and can be pulled by a modifed TeslaLogger (https://github.com/bassmaster187/TeslaLogger). The data is the same (?) as the ScanMyTesla app uses.
The hardware consists of
- Raspberry Pi Zero
- Waveshare Pi Zero RS485 CAN HAT (https://www.waveshare.com/wiki/RS485_CAN_HAT)
- Pi Zero UPS Lite (https://github.com/linshuqin329/UPS-Lite)
- DS3231 RTC Shield
- Arduino Pro Mini ATMega328 3.3V 8MHz
- DC/DC Converter 14V -> 5V
The software consists of
- .net executable for Mono on Raspberry Pi running as a service
- Arduino sketch for ATMega328
Connect the Pi with the CAN Hat, UPS, Arduino and RTC like described in the Fritzing file.
Create SD card with Raspbian 10 (buster). Install Mono like described at https://www.mono-project.com/download/stable/#download-lin-debian but using stable-raspbianbuster:
sudo apt install apt-transport-https dirmngr gnupg ca-certificates
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
echo "deb https://download.mono-project.com/repo/debian stable-raspbianbuster main" | sudo tee /etc/apt/sources.list.d/mono-official-stable.list
sudo apt update
Prepare startup/shutdown control, CAN HAT and RTC in /boot/config.txt. Pay attention to oscillator, older versions of the CAN HAT may use a different frequency:
dtparam=spi=on
dtoverlay=mcp2515-can0,oscillator=12000000,interrupt=25,spimaxfrequency=1000000
dtoverlay=gpio-poweroff,gpiopin=17,active_low="y"
dtoverlay=gpio-shutdown,gpio_pin=27
dtoverlay=i2c-rtc,ds3231
Get the free Visual Studio Community Edition (or any other VS) and install the Mono Framework (https://www.mono-project.com/download/stable/). I don't know what's the proper way to tell Visual Studio about the Mono .net library location, I set the "Reference Paths" in TeslaCAN's and dbus-sharps's project properties to the Mono framework directory (e.g. C:\Program Files\Mono\lib\mono\4.6-api). Otherwise Visual Studio will report missing namespace 'Mono'. Now compile TeslaCAN project. Copy the exe and dll files from the bin directory to /home/pi/TeslaCAN. Install Linux service by copying VisualStudio/Linux Service/TeslaCAN.service to /usr/lib/systemd/system/. Permanently install the service with
sudo systemctl enable TeslaCAN
In case you want to debug code on the Pi have a look at VSMonoDebugger. This works almost as nice as debugging on a PC!
Compile and flash Arduino/raspi_power.ino to the Arduino Pro Mini.
