This software typically interfaces with a compatible hardware dongle (often branded under the "HH" family of multiplexers or J2534 pass-through devices) to communicate with every electronic control unit (ECU) in a vehicle. This includes:

There is no single "official" HH OBD website; instead, the device relies on a variety of compatible third-party applications and drivers.

Look at the back or bottom of your HH OBD interface. You will see a silk screen marking (e.g., "HH V2.0"). You must download the software that matches this hardware revision. Using V1.0 software on V2.0 hardware will cause a "Device Not Found" error.

: Displays live sensor data, including engine RPM, coolant temperature, fuel system status, and vehicle speed. Compatibility

While many HH OBD units are Bluetooth-only and strictly for Android/Windows, newer Wi-Fi or Bluetooth 4.0 versions work with apps like Car Scanner ELM OBD2 on the Apple App Store. Key Features of HH OBD Advanced

: Supports most 12V gasoline and light diesel vehicles manufactured after 1996. Software Download Options

The "software" for HH OBD Advanced is often a third-party application compatible with the ELM327 hardware.