Bluetooth device name and corresponding serial port name in python

When working with Bluetooth devices in Python, it is often necessary to know the device name and its corresponding serial port name. This information is crucial for establishing a connection and communicating with the device. In this article, we will explore three different ways to obtain the Bluetooth device name and its serial port name in Python.

Option 1: Using PyBluez Library

PyBluez is a Python extension module that allows Python programs to access Bluetooth resources. It provides a high-level interface for Bluetooth operations, including discovering nearby devices and retrieving their information.

import bluetooth

def get_bluetooth_device_info():
    nearby_devices = bluetooth.discover_devices()
    device_info = []
    
    for device in nearby_devices:
        device_name = bluetooth.lookup_name(device)
        device_port = bluetooth.find_service(address=device)[0]['port']
        device_info.append((device_name, device_port))
    
    return device_info

bluetooth_devices = get_bluetooth_device_info()
for device in bluetooth_devices:
    print(f"Device Name: {device[0]}, Serial Port: {device[1]}")

This code snippet uses the PyBluez library to discover nearby Bluetooth devices. It then retrieves the device name using the lookup_name() function and the serial port name using the find_service() function. The device name and serial port name are stored in a list of tuples and returned as the output.

Option 2: Using PySerial Library

PySerial is a Python library that provides support for serial communication. It allows Python programs to establish a connection with serial devices, including Bluetooth devices. By using PySerial, we can obtain the serial port name associated with a Bluetooth device.

import serial.tools.list_ports

def get_bluetooth_device_info():
    ports = list(serial.tools.list_ports.comports())
    device_info = []
    
    for port in ports:
        if 'Bluetooth' in port.description:
            device_info.append((port.device, port.description))
    
    return device_info

bluetooth_devices = get_bluetooth_device_info()
for device in bluetooth_devices:
    print(f"Serial Port: {device[0]}, Description: {device[1]}")

This code snippet uses the PySerial library to list all available serial ports. It then filters the list to include only Bluetooth devices by checking if the description contains the word “Bluetooth”. The serial port name and description are stored in a list of tuples and returned as the output.

Option 3: Using System Commands

If you prefer a more system-level approach, you can use system commands to obtain the Bluetooth device name and its corresponding serial port name. This option is platform-dependent and may require additional setup or configuration.

import subprocess

def get_bluetooth_device_info():
    device_info = []
    
    output = subprocess.check_output(['hcitool', 'dev']).decode('utf-8')
    lines = output.split('n')[1:-1]
    
    for line in lines:
        parts = line.split('t')
        device_info.append((parts[1], parts[0]))
    
    return device_info

bluetooth_devices = get_bluetooth_device_info()
for device in bluetooth_devices:
    print(f"Device Name: {device[0]}, Device Address: {device[1]}")

This code snippet uses the hcitool command-line tool to retrieve the Bluetooth device name and its corresponding address. The output is then parsed to extract the device name and address, which are stored in a list of tuples and returned as the output.

After exploring these three options, it is clear that the best option depends on your specific requirements and the libraries or tools available in your environment. If you are already using PyBluez or PySerial in your project, it makes sense to leverage their functionalities to obtain the Bluetooth device name and serial port name. However, if you prefer a more system-level approach or have specific platform dependencies, using system commands may be the better choice.

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