write:function(){
var that=this;
var buffer = new ArrayBuffer(16)
var dataView = new DataView(buffer)
var str = '0xd3,0x80,0x60,0x79,0x76,0xc9,0xdd,0x46,0xe5,0x18,0xf4,0x31,0xf6,0x4e,0xb6,0x44';
var arr = str.split(',')
var val;
for (var i = 0; i < arr.length; i++) {
val = parseInt(arr[i], 16)
dataView.setInt8(i, val);
}
wx.writeBLECharacteristicValue({
deviceId: that.data.deviceId,
serviceId: that.data.services,
characteristicId: that.data.characteristicsFEC7,
value: buffer,
success: function (res) {
console.log(res, 'writeBLECharacteristicValue success');
wx.onBLECharacteristicValueChange(function (res) {
console.log('-writeaaaaaaaaa:', res);
var buffer = Array.prototype.map.call(new Uint8Array(res.value), x => ('00' + x.toString(16)).slice(-2)).join('');
console.log(buffer)
})
wx.notifyBLECharacteristicValueChange({
state: true, // 启用 notify 功能
deviceId: that.data.deviceId,
serviceId: that.data.services,
characteristicId: that.data.characteristicsFEC8,
success: function (res) {
console.log('notifyBLECharacteristicValueChange success', res.errMsg)
},
fail: function (res) {
console.log('notifyBLECharacteristicValueChange fail', res.errMsg)
}
})
},
fail: function (res) {
console.log(res, 'buff fail')
}
})
},
read:function(){
var that=this;
wx.onBLECharacteristicValueChange(function (res) {
console.log('-write:', res);
var buffer = Array.prototype.map.call(new Uint8Array(res.value), x => ('00' + x.toString(16)).slice(-2)).join('');
console.log(buffer)
// const blueArrayBuffer = new Uint8Array(res.value);
// const base64Str = wx.arrayBufferToBase64(blueArrayBuffer);
// console.log(base64Str)
})
//读取低功耗蓝牙设备的特征值的二进制数据值
wx.readBLECharacteristicValue({
deviceId: that.data.deviceId,
serviceId: that.data.services,
characteristicId: that.data.characteristicsFEC9,
success: function (res) {
console.log('readBLECharacteristicValue++++++++++++++++++++++:', res)
},
fail: function (res) {
console.log('readBLECharacteristicValue fail:', res)
},
})
},
为什么写入后读取的console.log(buffer) 是000000000000000000000000000000000000 求助
