1、notify返回成功

2、write也返回成功

3、问题是onBLECharacteristicValueChange没回调，没有数据

wx.notifyBLECharacteristicValueChange({

deviceId: deviceId,

serviceId: bleServiceUUID,

characteristicId: character.uuid,

state: true,

type:'notification',

success(res) {

console.log('notification通知数据', res);

// 操作之前先监听，保证第一时间获取数据

console.log("监听设备返回数据--->"); //5d0000000001be304d

wx.onBLECharacteristicValueChange((res) =>{

console.log(`characteristic ${res.characteristicId} has changed, now is ${res.value}`)

var resData = ab2hex(res.value); //转16进制

console.log("设备返回数据--->", resData); //5d0000000001be304d

// that.closeBLEConnection(that._deviceId);

// that.closeBluetoothAdapter();

})

},

fail(res) {

console.log('notifyBLECharacteristicValueChange fali', res);

}

})

这是notify成功后调用wx.onBLECharacteristicValueChange监听

//类型转换

let buffer1 = new ArrayBuffer(2)

let dataView = new DataView(buffer1)

dataView.setUint8(0, 0x01)

// dataView.setUint8(1, 0x01)

wx.writeBLECharacteristicValue({

deviceId: this._deviceId,

serviceId: this._serviceId,

characteristicId: this._writeId,

value: buffer1,

success: (res) => {

console.log("写数据返回结果", res.errMsg);

//项目需求： 发送某个指令后的需要处理回调

// if (action == 'lastZero') {

// console.log('最后一次写入00需执行回调========》');

// //回调 目的: 执行调用提交接口

// eyeCareObj.eyeCareCallback();

// }

},

fail(res) {

console.log("写数据失败..", res);

// asddErrorCallback(res.errCode, "");

}

})这个是写入的代码