qt ble蓝牙central驱动
此处分享一个ble蓝牙central驱动,此处lambda表达式利用比较多
toolbluetooth.h
#ifndef TOOLBLUETOOTH_H #define TOOLBLUETOOTH_H #include <QObject> #include<QBluetoothDeviceDiscoveryAgent> #include<QBluetoothDeviceInfo> #include<QBluetoothUuid> #include<QBluetoothServiceInfo> #include<QLowEnergyController> #include<QLowEnergyService> #include<QLowEnergyDescriptor> class ToolBluetooth : public QObject { Q_OBJECT public: explicit ToolBluetooth(QObject *parent = nullptr); ~ToolBluetooth(); void init(QString number);//初始化链接等 void send(QByteArray msg);//发送数据 signals: void sigReceived(QByteArray &msg);//接受数据 void sigDeviceState(QString &msg);//当前设备状态 private slots: //void test(); private: QString number="";//记录当前表号 QByteArray repeatmsg;//如果数据完全一样,则抛弃这个数据 bool sendflag = true;//发送信号按钮,这个属于特殊案例 QList<QBluetoothDeviceInfo> device_list; //存放搜索到到蓝牙设备列表 QBluetoothDeviceDiscoveryAgent *m_deviceDiscoveryAgent = nullptr; //设备搜索对象 QLowEnergyController *m_controler = nullptr; //单个蓝牙设备控制器 QLowEnergyService *m_service = nullptr; //服务对象实例 QLowEnergyCharacteristic c; }; #endif // TOOLBLUETOOTH_H
toolbluetooth.cpp
#include "toolbluetooth.h" #include <QDebug> #include "lib/mylib.h" //extern void StringToHex(char *str, u8 *hex, u16 strLen); ToolBluetooth::ToolBluetooth(QObject *parent) : QObject(parent) { } ToolBluetooth::~ToolBluetooth() { m_deviceDiscoveryAgent->deleteLater();m_deviceDiscoveryAgent = nullptr; m_controler->deleteLater();m_controler = nullptr; m_service->deleteLater();m_service = nullptr; } //初始化链接 void ToolBluetooth::init(QString num) { number = num; m_deviceDiscoveryAgent = new QBluetoothDeviceDiscoveryAgent(this); m_deviceDiscoveryAgent->setLowEnergyDiscoveryTimeout(5000); //如果某些时间断开链接了，程序必须重新加载，之前建立的链接都失效，需要清空//主要是两个 if(m_controler != nullptr) m_controler->deleteLater(); if(m_service != nullptr) m_service->deleteLater(); //每次发现新设备时触发 connect(m_deviceDiscoveryAgent, &QBluetoothDeviceDiscoveryAgent::deviceDiscovered, this ,[this]() { qDebug() << "find a new bluebooth device";}); //蓝牙设备搜索完成后，筛选出目标设备进行连接，并进行相关信号与槽函数的绑定 connect(m_deviceDiscoveryAgent,&QBluetoothDeviceDiscoveryAgent::finished, this, [this]() { device_list = this->m_deviceDiscoveryAgent->discoveredDevices(); //遍历显示设备详情 QList<QBluetoothDeviceInfo>::iterator it; for(it=device_list.begin(); it != device_list.end(); it++) { // 外围蓝牙设备对象 QBluetoothDeviceInfo tmp_device = *it; QString device_name = tmp_device.name(); qDebug() <<"device name:::" << device_name; //if(!device_name.contains("onor")){continue;} if(!device_name.contains(number==""?"zenner":number)){continue;}//防止某些人就是不传表号，给他一个头疼的数据让他头疼去吧 qDebug() <<"find task device-----------------------" << device_name; m_controler = QLowEnergyController::createCentral(tmp_device); m_controler->connectToDevice(); // 监听目标设备连接成功消息，连接成功后，搜索目标设备等服务列表 connect(m_controler, &QLowEnergyController::connected, this, [this](){ qDebug() << "m_controler connected ......"; //必须要在连接建立后 执行开始寻找service的函数 //之前调试，就是因为没有在设备连接后主动请求获取服务列表信息，后续监听便没有触发 m_controler->discoverServices(); }); // 监听发现服务消息，如果服务的uuid 为约定好的要使用服务类型，则进行后续处理 connect(m_controler,&QLowEnergyController::serviceDiscovered, this, [this](QBluetoothUuid serviceUuid) { if(serviceUuid == QBluetoothUuid( quint16(0xff00))) { //我们用的服务类型是0xffd0对应的uuid //发现匹配的服务后，使用控制器对象创建服务对象 m_service = m_controler->createServiceObject(serviceUuid,this); if(m_service) { // 服务对象创建成功后，坚挺服务状态变化，如果状态变成已发现，则进行后续服务下特征对象获取 connect(m_service,&QLowEnergyService::stateChanged, this, [this]() { qDebug() << "service state change" << m_service->state() << ",||||||"; //发现服务, 建立characteristic对象实例 if(m_service->state() == QLowEnergyService::ServiceDiscovered) { QLowEnergyCharacteristic hrChar = m_service->characteristic(QBluetoothUuid(quint16(0xff10))); if(!hrChar.isValid()) { qDebug() << "characteristic fff6 error:::"; } else { qDebug() << "characteristic fff0 finished:::uuid"<<hrChar.uuid()<<", value"<<hrChar.value(); //到达此处说明已经成功建立链接 c = hrChar; QString temstr = "device state: connected..."; emit sigDeviceState(temstr); m_service->writeCharacteristic(hrChar,QString("\ncentral connect test!!!\n").toLatin1()); } // 设置特征对象可用 //enable the chracteristic notification by write 0x01 to client characteristic configuration QLowEnergyDescriptor m_notificationDesc = hrChar.descriptor(QBluetoothUuid::ClientCharacteristicConfiguration); qDebug() << "m_service->writeDescriptor(m_notificationDesc, QByteArray::fromHex:::"; m_service->writeDescriptor(m_notificationDesc, QByteArray::fromHex("0100")); } }); // 通过监听特征对象的变化，不断获得鞋垫压力数据。 connect(m_service,&QLowEnergyService::stateChanged, this, [this](QLowEnergyService::ServiceState newState) { qDebug() << "central QLowEnergyService::stateChanged change::::::::::::::::::::::::::::::::::::::::"<<newState; //QString temstr = QString(value);emit sigReceived(temstr); }); // 通过监听特征对象的变化，不断获得鞋垫压力数据。 connect(m_service,&QLowEnergyService::characteristicRead, this,[this]() { qDebug() << "central QLowEnergyService::characteristicRead change::::::::::::::::::::::::::::::::::::::::"; //QString temstr = QString(value);emit sigReceived(temstr); }); // 通过监听特征对象的变化，不断获得鞋垫压力数据。 connect(m_service,&QLowEnergyService::characteristicWritten, this,[this]() { qDebug() << "central QLowEnergyService::characteristicWritten change::::::::::::::::::::::::::::::::::::::::"; //QString temstr = QString(value);emit sigReceived(temstr); }); // 通过监听特征对象的变化，不断获得鞋垫压力数据。 connect(m_service,&QLowEnergyService::descriptorRead, this,[this]() { qDebug() << "central QLowEnergyService::descriptorRead change::::::::::::::::::::::::::::::::::::::::"; //QString temstr = QString(value);emit sigReceived(temstr); }); connect(m_service,&QLowEnergyService::descriptorWritten, this,[this]() { qDebug() << "central QLowEnergyService::descriptorWritten change::::::::::::::::::::::::::::::::::::::::"; //QString temstr = QString(value);emit sigReceived(temstr); }); // QObject::connect(m_service,&QLowEnergyService::error, this,[=](QLowEnergyService::ServiceError error) { // qDebug() << "central QLowEnergyService::characteristicWritten change::::::::::::::::::::::::::::::::::::::::"; // //QString temstr = QString(value);emit sigReceived(temstr); // }); connect(m_service,&QLowEnergyService::characteristicChanged, this, [this](QLowEnergyCharacteristic c,QByteArray value) { qDebug() << "characteristicChanged central characteristicChanged state change::" <<c.uuid()<< ",||||||"; qDebug() << "characteristicChanged central value length::" << value.length(); qDebug() << "characteristicChanged central value length::" << value; //QString temstr = QString(value);emit sigReceived(temstr); //if(sendflag){emit sigReceived(value);}sendflag = !sendflag;//隔一个 emit sigReceived(value); //if(sendflag==true)sendflag=false;if(sendflag==false)sendflag=true; } ); // 触发服务详情发现函数 ，不要忘记调用 m_service->discoverDetails(); } } }); connect(m_controler,&QLowEnergyController::discoveryFinished, this, [this]() { qDebug() << "finish service discovery"; }); connect(m_controler,&QLowEnergyController::disconnected,this,[this](){ qDebug()<<"QLowEnergyController::disconnected------------------------------------"<<endl; QString temstr = QString("device state: disconnected...");emit sigDeviceState(temstr); }); connect(m_controler, QOverload<QLowEnergyController::Error>::of(&QLowEnergyController::error), [=](QLowEnergyController::Error newError){ qDebug()<<"QLowEnergyController::Error--------------------"+newError<<endl; //QString temstr = QString("device state: disconnected...");emit sigDeviceState(temstr); }); connect(m_controler, QOverload<QLowEnergyController::ControllerState>::of(&QLowEnergyController::stateChanged), [=](QLowEnergyController::ControllerState state){ qDebug()<<"QLowEnergyController::ControllerState--------------------"+QString(state)<<endl; //QString temstr = QString("device state: disconnected...");emit sigDeviceState(temstr); }); // connect(m_controler,&QLowEnergyController::connectionUpdated,this,[this](){ // qDebug()<<"QLowEnergyController::disconnected------------------------------------"<<endl; // QString temstr = QString("device state: disconnected...");emit sigDeviceState(temstr); // }); //QTimer *timer = new QTimer(this); //connect(timer, &QTimer::timeout, this, [this](){ qDebug() <<"state:::" << this->m_controler->state();}); //timer->start(1000); } }); // 开始外围设备搜索pip install https://pypi.douban.com/simple/ django m_deviceDiscoveryAgent->start(); } //发送数据 void ToolBluetooth::send(QByteArray msg) { // QByteArray byte; // byte = QByteArray(msg);//这种方式遇到00自动停止解析=_=//还崩溃 // qDebug()<<"toolbluetooth.cpp: "+QString(byte.toHex())<<endl; // //因为writeCharacteristic使用QByteArray传递数据//遇到00自动停止发送,因此换一个发送方式 //把数据拆开,用ascii发送,eg:0x68拆解为6和8 // //这种方式程序崩溃//原因之一是未申请空间 // int len = strlen(msg); // char *str = new char(len*2); // for (int i = 0; i < len; i++) // { // int temp = msg[i] / 16; // if (temp <= 9) // str[2*i] = temp + '0'; // else // str[2*i] = temp - 10 + 'a'; // temp = msg[i] % 16; // if (temp <= 9) // str[2*i+1] = temp + '0'; // else // str[2*i+1] = temp - 10 + 'a'; // } // qDebug()<<"toolbluetooth.cpp: "+QString(str)<<endl; // QLowEnergyCharacteristic hrChar = m_service->characteristic(QBluetoothUuid(quint16(0xff10))); // if(!hrChar.isValid()) { qDebug() << "characteristic fff6 error:::";}else{m_service->writeCharacteristic(hrChar,msg);} // QLowEnergyDescriptor m_notificationDesc = hrChar.descriptor(QBluetoothUuid::ClientCharacteristicConfiguration); // m_service->writeDescriptor(m_notificationDesc, QByteArray::fromHex("0100")); // m_service->writeCharacteristic(c,msg); // QLowEnergyDescriptor m_notificationDesc = c.descriptor(QBluetoothUuid::ClientCharacteristicConfiguration); // m_service->writeDescriptor(m_notificationDesc, QByteArray::fromHex("0100")); m_service->writeCharacteristic(c,msg,QLowEnergyService::WriteWithoutResponse); }
注意: QBluetoothUuid::ClientCharacteristicConfiguration (+_+|)
