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BLE ELM327 for ESPHome
Plug-inMake ESPHome sensors from Bluetooth car readings
This ESPHome component polls a Bluetooth LE ELM327 adapter and publishes the readings as sensors. ESPHome is firmware for small home automation boards; it can pass the sensors to Home Assistant or use them in a local display.
You need a BLE-capable ESP32, an adapter and a YAML configuration with the right Bluetooth identifiers. Standard OBD-II and custom Mode 22 PIDs are implemented, including GM and PSA examples, but the author labels the component experimental and unverified. A vehicle only provides the PIDs its computers support.
- See live engine and battery readings
- Check an EV battery’s health
- Send car readings to Home Assistant
- Custom PID formulas
- Optional local display
- Queued raw diagnostic commands
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