ios、安卓都能发送数据，但是只有ios能接收到回传的数据

尝试了其他解决方法，设置MTU，设置延时都不行

js代码如下

const mtu = 512;
wx.setBLEMTU({
        deviceId: that.data.connectedDeviceId,
        mtu,
        success:(res)=>{
          console.log("setBLEMTU success>>", res)
        },
        fail:(res)=>{
          console.log("setBLEMTU fail>>", res)
        }
      })
wx.writeBLECharacteristicValue({
        deviceId: that.data.connectedDeviceId,
        serviceId: that.data.services[0].uuid,
        characteristicId: that.data.characteristics[0].uuid,
        value: buffer,
        success: function (res) {
          console.log('发送成功')
          wx.showToast({
            title: 'wifi id 发送成功',
          })
          setTimeout(function () {}, 1000); // 1秒延时
          wx.notifyBLECharacteristicValueChange({
            state: true,
            deviceId: that.data.connectedDeviceId,
            serviceId: that.data.services[0].uuid,
            characteristicId: that.data.characteristics[0].uuid,
            success: function (res) {
              console.log('启用notify成功')
              wx.onBLECharacteristicValueChange(function (res) {
                var receiveText = app.buf2string(res.value)
                console.log('接收到数据：' + receiveText)
                that.setData({
                  receiveText: receiveText
                })
              })
            }
          })
        }
      })