uni-app 蓝牙连接设备

Bertha 。 2022-09-06 00:28 675阅读 0赞

连接蓝牙设备总共需要一下几步

> [ uni-app官方文档][uni-app]

1.先查看系统蓝牙状态 uni.openBluetoothAdapter(obj)  
2.搜索附近的蓝牙设备并且监听寻找到新设备的事件  
uni.startBluetoothDevicesDiscovery(obj)搜索附近的蓝牙设备 uni.onBluetoothDeviceFound(obj)监听寻找到新设备的事件  
3.成功找到对应蓝牙设备后 需关闭搜索  
uni.stopBluetoothDevicesDiscovery(obj) 停止搜寻附近的蓝牙外围设备  
4.连接低功耗蓝牙设备 连接成功后调用uni.getBLEDeviceServices来获取蓝牙设备所有服务  
uni.createBLEConnection(obj) 连接低功耗蓝牙设备  
uni.getBLEDeviceServices(obj) 获取蓝牙设备所有服务(service)。  
5.获取蓝牙设备某个服务中所有特征值

1.先查看系统蓝牙状态  
uni.openBluetoothAdapter(obj)

uni.openBluetoothAdapter({ 
    					success: function(res) { 
    						console.log('是否开启蓝牙', res)
    					},
    					fail: function(msg) { 
    						console.log(msg)
    					}
    				})

2.搜索附近的蓝牙设备 并且监听寻找到新设备的事件

let that = this
    				uni.startBluetoothDevicesDiscovery({ 
    					success: function(res) { 
    						console.log('搜索设备---', res)
    						uni.onBluetoothDeviceFound(function(el) { 
    							console.log('new device list has founded')
    							console.log(el)
    							console.log(that.ab2hex(el.devices[0].advertisData))
    							//找到对应蓝牙设备名字
    							if (el.devices[0].name == '云音乐ME01-1384') { 
    								console.log("成功-------", el)
    								//成功后存储设备id
    								that.deviceId = el.devices[0].deviceId
    								that.stop()//关闭搜索 第三步方法名
    							}
    						})
    					},
    				})

3.成功找到对应蓝牙设备后 需关闭搜索附近设备

uni.stopBluetoothDevicesDiscovery({ 
    					success(res) { 
    						console.log('停止搜索---', res)
    					}
    				})

4.连接低功耗蓝牙设备 连接成功后调用uni.getBLEDeviceServices来获取蓝牙设备所有服务

let that = this
    				uni.createBLEConnection({ 
    					deviceId: this.deviceId,
    					success: (res) => { 
    						console.log('连接成功---', JSON.stringify(res))
    						//需延时连接，不然会报错
    						setTimeout(function() { 
    							uni.getBLEDeviceServices({ 
    								deviceId: that.deviceId,
    								success: (res) => { 
    									console.log('获取蓝牙设备所有服务', res)
    									that.uuid = res.services[0].uuid
    									that.huoqu(res.services[0].uuid) //第五步方法名
    								}
    
    							})
    						}, 1000)
    					}
    				})

5.获取蓝牙设备某个服务中所有特征值

let that = this
    				let deviceId = this.deviceId
    				uni.getBLEDeviceCharacteristics({ 
    					deviceId: this.deviceId,
    					serviceId: uuid,
    					success: (res) => { 
    						that.characteristics = res.characteristics[0].uuid
    						console.log('获取--------', res)
    					},
    					fail: (res) => { 
    						console.log('失败1--------', res)
    					}
    
    				})

[uni-app]: https://uniapp.dcloud.io/api/system/bluetooth