- 当前 Bug 的表现（可附上截图）

- 预期表现

- 复现路径

- 提供一个最简复现 Demo

notifyBLECharacteristicValueChange: function (){

var that = this;

wx.notifyBLECharacteristicValueChange({

state: true, // 启用 notify 功能

deviceId: that.data.deviceId,

serviceId: that.data.serviceId,

characteristicId: that.data.notifyCharacteristicId,

success: function (res) {

console.log("notify启动成功");

setTimeout(function (){

// ble.monitor_ble(that.data.deviceId,that.data.serviceId,that.data.writeCharacteristicId);

ble.refresh_ble(that.data.connected,that.data.deviceId, that.data.serviceId, that.data.writeCharacteristicId);

}//这个是我做的一个发送刷新命令的函数

,2000

);

setTimeout(function () {

wx.hideToast();

}, 2000);

},

fail: function (res) {

wx.showToast({

title: 'notify启动失败',

mask: true

});

}

})

},

/***我把那条函数封装成模块了*/

function ble_write_fun(orderStr, deviceId, serviceId, writeId) {

console.log("orderStr:", orderStr);

let order = utils.stringToBytes(orderStr);//字符串转byte

let byteLength = order.byteLength;

console.log("byteLength:", byteLength);

wx.writeBLECharacteristicValue({

deviceId: deviceId,

serviceId: serviceId,

characteristicId: writeId,

// 这里的value是ArrayBuffer类型(二进制数组)

value: order.slice(0, 20),//从0-20个字节的数据

success: function (res) {

// console.log("value:", utils.ab2str(order));

onBLECharacteristicValueChange(deviceId, serviceId, writeId);

},

fail: function (res) {

console.log("res:", res);

}

})

}

function onBLECharacteristicValueChange(deviceId, serviceId, writeId) {

wx.onBLECharacteristicValueChange(function (res) {

console.log("res.value:", utils.ab2str(res.value));

var resValueStr = utils.ab2str(res.value);//2进制数组转成字符串

console.log("读到字符串", resValueStr);

rev_page_parse(resValueStr,deviceId, serviceId, writeId);

});

}

function refreshPara(connected, deviceId, serviceId, writeId) {

if (connected) {

ble_write_fun(get_cmd, deviceId, serviceId, writeId);//写入发送

}

else {

app.showModal1("蓝牙已断开");

}

}

问题是这样。我发送一个刷新命令后开始监听读取数据。数据很小到问题不明显，设备发了528个字节。。然后在APP看到是完整收到，换成小程序后收到的是断断续续不确定。然后设备分包成20个字节发送出来，结论也一样，设备延时发送也一样，，问题是啥情况。。设备发送的数据