- 当前 Bug 的表现（可附上截图）

ios小程序 开启了notify 可以获取到特征值变化如下图：

同样代码Android小程序 notify也是开启成功，但是收不到特征值变化

- 预期表现

- 复现路径

- 提供一个最简复现 Demo

代码贴上

wx.getBLEDeviceServices({

// 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接

deviceId: deviceId,

success: function(res3) {

console.log('device services:', res3.services)

wx.getBLEDeviceCharacteristics({

// 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接

deviceId: deviceId,

// 这里的 serviceId 需要在上面的 getBLEDeviceServices 接口中获取

serviceId: that.globalData.serviceId,

success: function(res2) {

console.log('device getBLEDeviceCharacteristics:', res2.characteristics)

wx.notifyBLECharacteristicValueChange({

deviceId: deviceId,

serviceId: serviceId,

characteristicId: characteristicId,

state: true,

type: 'notification',

success: function(res) {

console.log(res)

console.log('notify开启成功')

setTimeout(function() {

wx.onBLECharacteristicValueChange(function(characteristic) {

console.log('characteristic value comed:', that.buf2hex(characteristic.value));

})

}, 1000)

},

fail: function(r) {

console.log(r)

}

})

setTimeout(function() {

wx.writeBLECharacteristicValue({ //开锁指令

deviceId: deviceId,

serviceId: serviceId,

characteristicId: characteristicId,

value: buffer,

success: function(res) {

console.log(res)

console.log('writeBLECharacteristicValue success', res.errMsg)

wx.readBLECharacteristicValue({

deviceId: deviceId,

serviceId: serviceId,

characteristicId: characteristicId,

success: function(res) {

console.log(res)

},

fail: function(e) {

console.log(e)

}

})

}, 1000);

},

fail: function(e) {

console.log('获取特征值')

console.log(e)

}

})

}

})