limiter121 / esp32-obd2-emulator

Open-source OBD-II emulator based on an ESP32 + CAN transceiver IC, controllable via WiFi through a simple web UI (or via API)
Mozilla Public License 2.0
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can car diagnostic emulator esp32 obd obd2 vehicle wifi

ESP32 OBD-II Emulator

Open-source OBD-II emulator based on an ESP32 + CAN transceiver IC, controllable via WiFi through a simple web UI (or via API).

Screenshot 1 Screenshot 2 Screenshot 3 Screenshot 4

Supported protocols

Supported modes & PIDs

Mode PID Description
0x01 0x0C RPM
0x01 0x0D Vehicle speed
0x01 0x11 Throttle position
0x09 0x02 Vehicle Identification Number (VIN)

Usage

  1. Connect to the WiFi network ESP32-OBD2 (with password 88888888)
  2. Navigate to 192.168.4.1
  3. Enjoy :)

Hardware

ESP32-WROOM-32 SN65HVD230 Schematic

Connections

Flash / Install (via esptool)

  1. Download the latest release binaries
  2. Flash (app, bootloader, FAT filesystem): esptool.py write_flash --flash_mode dio --flash_freq 40m --flash_size detect 0x1000 bootloader.bin 0x10000 obd2-emu.bin 0x8000 partitions.bin 0x110000 fatfs_image.img

Build

  1. Install the Espressif IoT Development Framework
  2. Clone this repo: git clone ...
  3. (Optional) Configure: make menuconfig
  4. Build: make all
  5. Flash: make flash
  6. Build & flash FAT image: make flashfatfs

Note: You might want to change some config values, for example: serial flasher, baud rate, pins, etc.

API

PATCH /api/vehicle

Acknowledgements