ESPHome CAN Sniffer

ESPHome components to build custom CAN Sniffer Firmware

What in this repo?

It's a set of example configurations, custom components, links to external modules to let you build firmware for your CAN Sniffer device.

Examples

• CAN Logger - Device to save logs to SDCard and host them over http.
• GVRET Protocol - Use your device in SavvyCAN via GVRET protocol

Hardware

• General hardware design considerations for car devices
  • Powering
  • Transceivers
  • ESP32C6

What's not in this repo?

Patches to ESPHome components, custom components, external modules and other stuff that could be used in ESPHome.

• ESPHome
• ESPHome patches used in this repo:
  • ESPHome CAN Bus
• ESPHome Custom Components
  • SDCard and HTTP File server

Contributing

If you have any questions, suggestions or want to contribute - feel free to open pull request.

Why ESPHome?

It let you code less.

You describe your device has in yaml:

• device board
• components it has
• pins you using
• what should happen when something happened
• small chunks of c++ code in lambda expressions
• big chunks of c++ code in custom components

ESPHome generates c++ code for your firmware, compiles it and uploaded to device

Isn't ESPHome for IoT home automation via Home Assistant

Yes it is. But all works just fine without Home Assistant. If you have one - enjoy your sensor data statistics over time and use Home Assistant to control your device in development.

How to build

• Make sure you have Python installed

• Create Virtual Environment

  python -m venv .venv

• Activate it

  Linux:

  source .venv/bin/activate

• Install ESPHome

  pip install ESPHome

• Switch to folder with yaml device description

  cd <my_device_folder>

• Build, upload and run your firmware

  esphome run <my_yaml_file>

License

The code in this repository is MIT licensed. But your final firmware will use ESPHome and other components licensed under GPLv3. Plese be warned.