写特性- Nodejs，Bleno，蓝牙

Question

蓝牙设备正在接收写请求，我可以在控制台中看到这一点的确认，但是传递的数据变量会产生相同的随机输出，而不管我在数据变量中传递了什么:我猜我是在以错误的格式发送或接收数据变量？

这是我的Android设备的代码，向蓝牙设备发送写请求

var data = new Uint8Array(2);
//var data = new Uint8Array([21,31]);  // also tried many versions of this

Object.keys(app.SENDWRITE).map(
function(characteristic){
    device.writeCharacteristic(
        characteristic,
        app.SENDWRITE[characteristic],
        data,
        function(error){console.log('Error occured')
        }
    );
});

以下是蓝牙设备上的代码，用于重述请求：

var bleno = require('bleno');
var os = require('os');
var util = require('util');

var BlenoCharacteristic = bleno.Characteristic;

var SomeCharacteristic = function() {
    SomeCharacteristic.super_.call(this, {
        uuid: 'THE_UUID',
        properties: ['write'],
    });

    this._value = new Buffer(0);
};

SomeCharacteristic.prototype.onWriteRequest = function(data, offset, withoutResponse, callback) {

    this._value = data;

    console.log('Date Received from Write Request: value = ' + this._value[0]);
   //console.log('Date Received from Write Request: value = ' + this._value);
//console.log('Date Received from Write Request: value = ' + this._value.toString('utf8'); // tried many versions of this

  callback(this.RESULT_SUCCESS);
};

util.inherits(SomeCharacteristic, BlenoCharacteristic);
module.exports = SomeCharacteristic;

不同的产出结果：

this._value = 158

this._value =？e

等等

Answer 1

需要更新布莱诺的新代码。现在修好了。