Black HH OBD Advanced ELM327 Bluetooth seen from the front, with Power, OBD and PC lights

Black ELM327 Bluetooth adapter seen at an angle, with the 16-pin OBD2 plug in the foreground

HH OBD ELM327 Bluetooth resting on its CD

HH OBD ELM327 Bluetooth from the front, back and at an angle, with the CD

Bluetooth adapter · Basic

ELM327 Bluetooth v2.1 HH

The simplest ELM327 Bluetooth v2.1, with status lights: reads and clears engine fault codes on Android or Windows, but does not work with every car.

Bluetooth
Android · Windows
No iPhone
v2.1

€7.37 VAT included · Satkit price checked on 7 October 2026

Where to buyfrom €7.37

SatkitElm327 V2.1 HH OBD2 Bluetooth: Car Diagnostic Tool Satkit €7.37View at Satkit

Prices incl. VAT checked on 7 October 2026; they may change.

Incompatible listSatkit publishes the cars it fails with
v2.1 cloneBest with recent CAN cars

Specifications

Connection: Classic Bluetooth
Chip: PIC18F25K80
Firmware: "HH OBD Advanced" clone reporting v2.1
Works with: Android and Windows (not iPhone)
Size: 45 × 25 × 70 mm
Lights: Power, OBD and PC
Includes: Driver CD

Why this adapter

The most basic ELM327: it reads generic and manufacturer fault codes, clears them and shows live data such as RPM, temperature, speed or throttle position. On Android, the most used app is Torque.

Before you buy

It fails with quite a few cars that use the older ISO 9141 or KWP2000 protocols, among others the Citroën C3 2004, Peugeot 206 2001, Renault Mégane II 2005, Fiat Tipo 2002 and several Toyota, Kia, Hyundai, Nissan and Mitsubishi models from those years. If your car is from that era, get the ELM327 Bluetooth v1.5 or the Konnwei KW903 instead.

It does not work with an iPhone (it is classic Bluetooth): for iPhone, get a Wi-Fi adapter.

v2.1 with a PIC18F25K80 chip?

This adapter uses the same PIC18F25K80 microcontroller as Satkit's ELM327 v1.5 adapters. "v2.1" is just the number the firmware reports when an app asks for it (the ATI command), not the chip: a clone can report any version it likes. Inside, it is the same chip as the v1.5. To see which commands it really answers, test it with an app such as ELM327 Identifier (Android).

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