Linux 端蓝牙调试工具

程序员文章站 2022-03-03 20:57:49

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Linux 端蓝牙调试

@(嵌入式)[BLE]

毕业大半年一直从事Ble外设开发，发现linux上可以使用bluez进行蓝牙开发，更加便捷的是，有一个python模块对bluez接口进行封装，叫bluepy，给开发测试带来更多便捷。

获取 & 安装

开发平台 ubunt 14.04

$ sudo apt-get install git build-essential libglib2.0-dev
$ git clone https://github.com/IanHarvey/bluepy.git
$ cd bluepy
$ python setup.py build
$ python setup.py install

个人测试脚本库mybluepy, 没怎么写过python，供参考。

使用 hcitool & gatttool

安装了bluez协议栈后提供的工具，简单操作如下。

查看蓝牙pc的设备

hcitool dev

扫描ble

hcitool lescan

设置gatttool

 gatttool  -b 76:66:44:33:22:72 -I

-I : 进入交互模式

在gatttool下，
开始连接设备： connect
输入： help查看其他指令
输入characteristics 查看特征值信息，结果大概如下

handle: 0x0022, char properties: 0x1a, char value handle: 0x0023, uuid: 0000a802-0000-1000-8000-00805f9b34fb

如上， handle 0x0023 写数据，向0x0023+1 写 0x0100，设置监听，写0取消监听

bluepy 脚本

模块文档
提供一个简单的例子：

#!/usr/bin/python

from __future__ import print_function
import sys
import binascii
import btle
import os

ble_conn = None

class MyDelegate(btle.DefaultDelegate):

    def __init__(self, conn):
        btle.DefaultDelegate.__init__(self)
        self.conn = conn

    def handleNotification(self, cHandle, data):
        data = binascii.b2a_hex(data)
        print("Notification:", str(cHandle), " data ", data)

    def handleDiscovery(self, dev, isNewDev, isNewData):
        if isNewDev:
            pass
        elif isNewData:
            print("\\nDiscovery:", "MAC:", dev.addr, " Rssi ", str(dev.rssi))
            
            
def ble_connect(devAddr):
    global ble_conn
    if not devAddr is None and ble_conn is None:
        ble_conn = btle.Peripheral(devAddr, btle.ADDR_TYPE_PUBLIC)
        ble_conn.setDelegate(MyDelegate(ble_conn))
        print("connected")

def ble_disconnect():
    global ble_conn
    ble_conn = None
    print("disconnected")


if __name__ == '__main__':

    ble_mac == "66:55:44:33:22:11"
   
    # scan 
    scanner = btle.Scanner().withDelegate(MyDelegate(None))
    timeout = 10.0
    devices = scanner.scan(timeout)
    for dev in devices:
        if dev.addr == ble_mac:
            print("\\nDiscovery:", "MAC:", dev.addr, " Rssi ", str(dev.rssi))
            for (adtype, desc, value) in dev.getScanData():
                print ("  %s(0x%x) = %s" % (desc, int(adtype), value))
            break
   
    # connect  
    ble_connect(ble_mac)
    # write , set listen
    snd_content_str = """\\x01\\x00"""
    ble_conn.writeCharacteristic(handle, snd_content_str)
    
    # wait notification  
    ble_conn.waitForNotifications(2.0)
    
    # disconnect 
    ble_disconnect()