ELM327 OBD2 Bluetooth 4.0 (PIC18F25K80) – Universal Fault Code Reader for iOS/Android/Windows

Short Version

This ELM327 OBD2 scanner with PIC18F25K80 and Bluetooth 4.0 (dual-mode 2.0/4.0) is a convenient wireless fault code reader that connects your car's ECU to your mobile phone, tablet, or computer. It is designed to work on OBD2-compatible vehicles and supports iOS, Android, and Windows, making it especially practical if you want to use the same adapter with different devices.

With a compatible app, you can read and clear fault codes (generic and some manufacturer-specific), turn off the MIL/Check Engine light, and view live data such as RPM, speed, temperatures, fuel trims, intake pressure, ignition, air flow, TPS, and O2 sensor values (car-dependent). The product description also highlights a “dashboard/HUD” experience via the app, where you can display real-time gauges and log driving data to analyze fuel consumption and driving behavior.

Bluetooth 4.0 provides faster data and lower power consumption compared to older solutions. The adapter is powered by the car's OBD2 port and is specified for 9–16V (12V systems). It supports common OBD2 protocols including CAN, ISO9141-2, and KWP2000. For best results, choose an app based on your platform: e.g., Torque/OBD Auto Doctor on Android and OBD Fusion/OBD Auto Doctor on iOS.

• Connectivity: Bluetooth dual-mode (2.0/4.0), BT4.0 support for iOS
• Platform: iOS / Android / Windows
• Chip: PIC18F25K80
• Voltage: 9–16V
• Function: DTC, MIL off, live data, dashboard/HUD via app

Advantages of Bluetooth 4.0 Dual-Mode

• BT4.0 support for iOS (Bluetooth Classic often doesn't work with iPhone)
• Lower power consumption and stable wireless connection
• Dual-mode (2.0/4.0) – wider compatibility between devices
• Smooth "plug & play" into the car's OBD2 port

Compatibility: iOS/Android/Windows

The product description details the following compatibility:

The adapter is specified for OBD2 protocol vehicles and is used in 12V systems.

Functions (What You Can Do)

1. Read Fault Codes (DTCs) – generic and some manufacturer-specific, with explanations (3000+ generic mentioned).
2. Clear Fault Codes and turn off MIL/Check Engine Light.
3. View Live Data from the ECU (car-dependent).
4. Dashboard/HUD via app (displays real-time gauges and improves overview).
5. Logging & Analysis of data (fuel/driving data depending on app features).

Live Data & Dashboard/HUD

You can monitor common parameters in real-time, for example:

• Engine RPM
• Coolant Temperature
• Vehicle Speed
• Short/Long Term Fuel Trim
• Intake Manifold Pressure
• Timing Advance
• Air Flow Rate
• Throttle Position
• O2-sensor values

Many apps can display this as a “cool dashboard” and some offer HUD mode (depending on phone mount and app functionality).

Apps & Software (examples according to product description)

Android

• OBD Auto Doctor
• Torque
• OBD Car Doctor
• E OBD2
• DashCommand

iOS

• OBD Auto Doctor
• GeekOBD_Viecar
• Mini OBDII
• OBD Fusion

Windows

• ScanMaster-ELM
• ScanTool.net
• PCMSCAN

The product description also mentions “Viecar software” as proprietary software and “continuous software upgrades”. In practice, most users choose an app based on their needs (fault scanning vs. live data vs. dashboard).

Step-by-Step: Getting Started

1) Plug in the adapter

1. Locate the car's OBD2 port (often under the dashboard).
2. Plug in the ELM327 adapter.
3. Turn on the ignition (ON).

2) Connect via Bluetooth

• iOS: often connects via the app's BLE flow (BT4.0 support).
• Android: connects via the app or Bluetooth settings, depending on the app.
• Windows: pair via Bluetooth and select the correct device in the software.

3) Read fault codes and save

1. Read DTCs and save/screenshot before clearing.
2. Fix the fault.
3. Clear codes and verify that they do not reappear.

Supported Protocols

1. SAE J1850 PWM (41.6Kbaud)
2. SAE J1850 VPW (10.4Kbaud)
3. ISO 9141-2 (5 baud init, 10.4 Kbaud)
4. ISO 14230-4 KWP (5 baud init, 10.4 Kbaud)
5. ISO 14230-4 KWP (fast init, 10.4 Kbaud)
6. ISO 15765-4 CAN (11bit ID, 500 Kbaud)
7. ISO 15765-4 CAN (29bit ID, 500 Kbaud)
8. ISO 15765-4 CAN (11bit ID, 250 Kbaud)
9. ISO 15765-4 CAN (29bit ID, 250 Kbaud)

Specifications

Package Contents

• 1 × ELM327 OBD2 Bluetooth 4.0 adapter (dual-mode)
• Manual/QR/app info (may vary depending on delivery)

FAQ – Frequently Asked Questions

1) Does it work with iPhone?

Yes, Bluetooth 4.0 support for iOS is mentioned in the product description.

2) Does it work with Android?

Yes, it supports Android and several Android apps are listed.

3) Does it work with Windows?

Yes, Windows is supported according to the product description.

4) Can it read ABS and airbag?

ELM327 is primarily for OBD2 (engine/emissions). ABS/SRS often require other tools or brand-specific support.

5) Can I turn off the check engine light?

Yes, it can clear fault codes and turn off the MIL if the fault is no longer active.

6) What is the advantage of BT4.0?

Lower power consumption, fast data, and iOS support compared to many BT2.0 dongles.

7) Which apps work best?

Torque/OBD Auto Doctor on Android and OBD Fusion/OBD Auto Doctor on iOS are common choices (app choice depends on needs).

8) Is it suitable for 24V vehicles?

No, the voltage is 9–16V and it is intended for 12V systems.

9) Do I need to pair it in the Bluetooth menu?

Depends on the app and platform. BLE often connects directly in the app.

10) Does it draw power when plugged into the OBD port?

Yes, OBD adapters can draw power. Do not leave it plugged in permanently if the car will be parked for a long time.

Notes & Safety

• OBD2 Limitation: Focus is on engine/emissions. Other systems may require different tools.
• Do not clear codes blindly: Document fault codes before clearing.
• iOS Connection: Connection often happens via the app (BLE) rather than the phone's BT menu.
• Power Consumption: Unplug the adapter if the car will be stationary for a long time.
• Safety: Do not use the diagnostic app while driving.

Summary

This ELM327 Bluetooth 4.0 adapter with PIC18F25K80 is a flexible choice for those who want to read/clear fault codes, monitor live data, and use a dashboard/HUD via an app – while also getting compatibility with iOS, Android, and Windows. A good "all-round" dongle for OBD2 cars when you want stable wireless connectivity and low power consumption.