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Mini elm327 Bluetooth OBD2

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Component Name

Mini Elm327 Bluetooth OBD2

Overview

The Mini Elm327 Bluetooth OBD2 is a compact, cost-effective, and widely compatible On-Board Diagnostic (OBD) adapter that enables users to connect their vehicles to Android, iOS, and Windows devices via Bluetooth. This adapter allows users to diagnose and monitor vehicle performance, troubleshoot issues, and access various vehicle parameters in real-time.

Functionality

The Mini Elm327 Bluetooth OBD2 is designed to read and clear trouble codes, display real-time engine data, and provide access to advanced features such as
OBD2 Protocol SupportThe adapter supports all OBD2 protocols, including SAE J1850 PWM, SAE J1850 VPW, ISO 15765-4 (CAN), ISO 9141-2, and ISO 14230-4 (PWM and VPW).
Real-time Data StreamingThe adapter streams real-time vehicle data, including engine speed, throttle position, fuel consumption, and more, to compatible devices.

Trouble Code Reading and Clearing

The adapter can read and clear Diagnostic Trouble Codes (DTCs) for various vehicle systems, including engine, transmission, and brakes.

Live Data Graphing

The adapter supports live data graphing, allowing users to visualize vehicle performance data in real-time.

Vehicle Information

The adapter can provide vehicle information, such as VIN, mileage, and fuel type.

Compact Design

The Mini Elm327 Bluetooth OBD2 is designed to be compact and discreet, making it easy to use in various vehicle sizes.

Bluetooth Connectivity

The adapter connects to Android, iOS, and Windows devices via Bluetooth 3.0, ensuring a reliable and stable connection.

Wide Vehicle Compatibility

The adapter is compatible with most OBD2-compliant vehicles, including passenger cars, trucks, and SUVs.

Low Power Consumption

The adapter has low power consumption, ensuring minimal impact on vehicle battery life.

CE and FCC Certified

The adapter meets CE and FCC certification standards, ensuring compliance with international safety and regulatory requirements.

Operating Voltage

9-32V

Operating Temperature

-40C to 85C

Storage Temperature

-40C to 125C

Bluetooth Version

3.0

Bluetooth Range

Up to 10 meters

Dimensions

35mm x 20mm x 10mm

Weight

20g

Package Includes

Mini Elm327 Bluetooth OBD2 adapter

User manual

Quick start guide

Warranty and Support

The Mini Elm327 Bluetooth OBD2 comes with a one-year limited warranty.

Dedicated customer support is available via email and phone.

Certifications and Compliance

CE certified

FCC certified

Complies with ISO 15765-4 (CAN) and SAE J1850 PWM protocols

Ordering Information

The Mini Elm327 Bluetooth OBD2 is available for purchase online and through authorized resellers.

Orders are typically shipped within 24-48 hours of receipt.

By providing a comprehensive overview of the Mini Elm327 Bluetooth OBD2's functionality, key features, and technical specifications, this documentation aims to assist technical professionals and informed hobbyists in understanding the component's capabilities and applications.

Pin Configuration

  • Mini ELM327 Bluetooth OBD2 Component Documentation
  • Pinouts and Connection Guide
  • The Mini ELM327 Bluetooth OBD2 is a compact, low-power device that connects to a vehicle's On-Board Diagnostics II (OBD2) port, allowing users to retrieve real-time vehicle data and diagnostics information via Bluetooth connectivity. The component features a 6-pin or 8-pin interface, depending on the variant. Below is a detailed explanation of each pin and how to connect them:
  • 6-Pin Variant:
  • 1. VCC (Power Input)
  • Function: Supplies power to the module
  • Voltage: 5V (maximum)
  • Connection: Connect to a 5V power source (e.g., a battery or a regulated power supply)
  • 2. GND (Ground)
  • Function: Provides a common ground reference
  • Connection: Connect to the ground of your system (e.g., a microcontroller or a power supply)
  • 3. TX (Transmit)
  • Function: Serial data transmission from the ELM327 to the host device
  • Connection: Connect to the RX (receive) pin of your microcontroller or serial communication module
  • 4. RX (Receive)
  • Function: Serial data reception from the host device by the ELM327
  • Connection: Connect to the TX (transmit) pin of your microcontroller or serial communication module
  • 5. OBD2_IN
  • Function: Connects to the OBD2 port of the vehicle
  • Connection: Connect to the OBD2 port of the vehicle using an OBD2 cable (usually connected to Pin 7 of the OBD2 connector)
  • 6. BTN (Reset)
  • Function: Resets the ELM327 module
  • Connection: Connect to a push-button or a digital output of your microcontroller to reset the module
  • 8-Pin Variant (additional pins):
  • 7. LED_IND (Status LED)
  • Function: Indicates the module's status (e.g., power, connection, or data transmission)
  • Connection: Connect to a LED indicator or a GPIO pin of your microcontroller to monitor the module's status
  • 8. NC (No Connection)
  • Function: Not connected/internally used
  • Connection: Leave this pin unconnected
  • Connection Considerations:
  • When connecting the OBD2_IN pin to the OBD2 port, ensure the cable is correctly oriented and securely connected to avoid damage or data corruption.
  • The TX and RX pins are used for serial communication. Ensure the communication protocol and baud rate are correctly configured on your microcontroller or serial communication module.
  • The BTN pin can be connected to a push-button or a digital output of your microcontroller to reset the module. A low signal on this pin will reset the ELM327.
  • When using the 8-pin variant, the LED_IND pin can be connected to a LED indicator or a GPIO pin of your microcontroller to monitor the module's status.
  • Additional Notes:
  • The Mini ELM327 Bluetooth OBD2 module operates at a baud rate of 38400 by default. This can be changed using AT commands.
  • The module supports various protocols, including SAE J1850 PWM, SAE J1850 VPW, ISO 15765-4, and ISO 9141-2.
  • Ensure the vehicle's OBD2 port is compatible with the module's supported protocols.
  • By following this guide, you should be able to successfully connect and use the Mini ELM327 Bluetooth OBD2 component in your IoT project.

Code Examples

Mini elm327 Bluetooth OBD2 Component Documentation
Overview
The Mini elm327 Bluetooth OBD2 is a compact, Bluetooth-enabled On-Board Diagnostics (OBD2) interface device that allows users to connect their vehicle's OBD2 port to a smartphone, tablet, or computer via Bluetooth. This component is designed to read and clear trouble codes, display real-time engine data, and provide various diagnostic functions.
Technical Specifications
Bluetooth Version: 3.0
 OBD2 Protocols: SAE J1850 PWM, SAE J1850 VPW, ISO 15765-4, ISO 14230-4, SAE J1939
 Operating Voltage: 12V
 Operating Temperature: -40C to 85C
 Dimensions: 45mm x 25mm x 15mm
Code Examples
### Example 1: Python Script for Reading Vehicle Data using Pyserial and Python-OBD2 Libraries
This example demonstrates how to use the Mini elm327 Bluetooth OBD2 component with a Python script to read vehicle data, including engine speed, throttle position, and coolant temperature.
Prerequisites:
Python 3.x installed on your computer
 Pyserial library installed using `pip install pyserial`
 Python-OBD2 library installed using `pip install python-obd2`
Code:
```python
import serial
import obd
# Establish a connection to the Mini elm327 Bluetooth OBD2 device
ser = serial.Serial('COM3', 38400, timeout=1)  # Replace COM3 with your device's serial port
# Create an OBD2 connection object
conn = obd.OBDConnection(ser)
# Read engine speed (RPM)
rpm = conn.query(obd.commands.RPM)
print("Engine Speed (RPM):", rpm.value)
# Read throttle position (%)
throttle_pos = conn.query(obd.commands.THROTTLE_POS)
print("Throttle Position (%):", throttle_pos.value)
# Read coolant temperature (C)
coolant_temp = conn.query(obd.commands.COOLANT_TEMP)
print("Coolant Temperature (C):", coolant_temp.value)
# Close the OBD2 connection
conn.close()
```
### Example 2: Android App using the OBD2 Library for Android
This example demonstrates how to use the Mini elm327 Bluetooth OBD2 component with an Android app to read and display vehicle data, including vehicle speed, fuel level, and engine load.
Prerequisites:
Android Studio installed on your computer
 OBD2 Library for Android installed in your project
Code:
```java
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.os.Bundle;
import android.util.Log;
import io.github.obd2.obd2library.OBD2Command;
import io.github.obd2.obd2library.OBD2Manager;
import io.github.obd2.obd2library.OBD2Response;
public class OBD2Activity extends AppCompatActivity {
    private OBD2Manager obd2Manager;
    private BluetoothSocket socket;
@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.obd2_activity);
// Initialize the OBD2Manager
        obd2Manager = new OBD2Manager(this);
// Connect to the Mini elm327 Bluetooth OBD2 device
        BluetoothDevice device = BluetoothAdapter.getDefaultAdapter().getRemoteDevice("XX:XX:XX:XX:XX:XX");  // Replace with your device's MAC address
        socket = device.createRfcommSocketToServiceRecord(UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"));
        socket.connect();
// Read vehicle speed (km/h)
        OBD2Command speedCmd = new OBD2Command("010D");
        OBD2Response speedResponse = obd2Manager.sendCommand(socket, speedCmd);
        Log.d("OBD2", "Vehicle Speed (km/h): " + speedResponse.getDecimalValue());
// Read fuel level (%)
        OBD2Command fuelCmd = new OBD2Command("012F");
        OBD2Response fuelResponse = obd2Manager.sendCommand(socket, fuelCmd);
        Log.d("OBD2", "Fuel Level (%): " + fuelResponse.getDecimalValue());
// Read engine load (%)
        OBD2Command loadCmd = new OBD2Command("0104");
        OBD2Response loadResponse = obd2Manager.sendCommand(socket, loadCmd);
        Log.d("OBD2", "Engine Load (%): " + loadResponse.getDecimalValue());
    }
}
```
These examples demonstrate the basic usage of the Mini elm327 Bluetooth OBD2 component in different programming languages and contexts. You can modify and expand these examples to suit your specific application requirements.