https://github.com/lankow/obd2-emulator

OBDII-Emulator is an ESP32-based tool designed to emulate data sent by OBDII interface. It serves as a testing utility for the CAR-BT-HMI project. The emulator simulates real-time OBD-II data, responding to Bluetooth read requests with dynamically changing values based on a cycle time.
https://github.com/lankow/obd2-emulator

arduino cpp11 esp32

Last synced: 2 months ago
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OBDII-Emulator is an ESP32-based tool designed to emulate data sent by OBDII interface. It serves as a testing utility for the CAR-BT-HMI project. The emulator simulates real-time OBD-II data, responding to Bluetooth read requests with dynamically changing values based on a cycle time.

• Host: GitHub
• URL: https://github.com/lankow/obd2-emulator
• Owner: Lankow
• Created: 2024-12-30T10:42:24.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2025-07-22T22:22:13.000Z (11 months ago)
• Last Synced: 2025-07-23T00:18:33.704Z (11 months ago)
• Topics: arduino, cpp11, esp32
• Language: C++
• Homepage:
• Size: 176 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# OBDII-Emulator

## About

OBDII-Emulator is an ESP32-based tool designed to emulate data sent by OBDII interface. It serves as a testing utility for the [CAR-BT-HMI](https://github.com/Lankow/car-bt-hmi) project. The emulator simulates real-time OBD-II data, responding to Bluetooth read requests with dynamically changing values based on a cycle time.

### OBD-II PIDs

OBDII-Emulation is performed as per [Wikipedia OBD-II PIDS](https://en.wikipedia.org/wiki/OBD-II_PIDs).

- **Implemented OBD-II PIDs**

  - Engine Speed `01 0C`

  - Vehicle Speed `01 0D`

### Key Features

- **Configuration**

  - The ESP32 acts as an access point with a static IP `(192.168.4.2)`.

  - Allows users to modify settings such as cycle time, min/max values, and increment steps.

  - Stored in `/data/default_config.json`, users can adjust SSID, password, and OBD parameter settings.

  - Configuration is stored in flash memory, allowing persistence across reboots.

- **Emulation**

  - Simulates real-time updates to OBD parameters and responds to Bluetooth requests with corresponding values.

  - Connect to `OBDII-ESP` via Bluetooth in order to send requests.

### Requirements

- **Software**:

  - VSCode as IDE

  - PlatformIO

- **Hardware**:

  - ESP32 board

### Using Commands

- Build: `pio run`

- Upload: `pio run nobuild -t upload`

- Upload Filesystem Image (default_config.json): `pio run -t uploadfs`