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你好 我使用了这个模块 打开蓝牙、连接蓝牙等功能都可以用 可是readbt一直没有返回值 请问是为什么啊
代码如下：
<!DOCTYPE html>
<html lang='zh-CN'>
<meta charset="UTF-8">
<meta name="viewport" content="maximum-scale=1.0, minimum-scale=1.0, user-scalable=0, initial-scale=1.0, width=device-width"/>
<meta name="format-detection" content="telephone=no, email=no, date=no, address=no">
<title>WinA</title>
<link rel="stylesheet" type="text/css" href="css/api.css" />
<link rel="stylesheet" type="text/css" href="css/box.css" />
<script type="text/javascript" src="script/public.js"></script>
<style>
p{
color:#999;
padding:5px;
}
</style>
<head>
</head>
<script type='text/javascript'>
function opbt(){
var obj = api.require('btmodule');
obj.OpenBT();
}
function scanbt(){
var obj = api.require('btmodule');
obj.ScanBT();
}
function readbt(){
var obj = api.require('btmodule');
var param = {
service: "6e400001-b5a3-f393-e0a9-e50e24dcca9e",
charUUID: "6e400002-b5a3-f393-e0a9-e50e24dcca9e"
};
obj.ReadBT(param, function(ret, err) {
var msg = ret.received;
api.toast({
msg: msg
});
});
}
function writebt(){
var obj = api.require('btmodule');
var param = {
service: "6e400001-b5a3-f393-e0a9-e50e24dcca9e",
charUUID: "6e400002-b5a3-f393-e0a9-e50e24dcca9e",
data: 25
};
obj.WriteBT(param);
if(ret){
alert('xieshuchenggong');
}
}
function notifybt(){
var obj = api.require('btmodule');
var param = {
service: "6e400001-b5a3-f393-e0a9-e50e24dcca9e",
charUUID: "6e400003-b5a3-f393-e0a9-e50e24dcca9e",
enable: true
};
obj.NotifyBT(param, function(ret, err) {
var msg = ret.received;
api.toast({
msg: msg
});
});
}
function disconnectbt(){
var obj = api.require('btmodule');
obj.DisConnectBT();
}
function closebt(){
var obj = api.require('btmodule');
obj.CloseBT();
}
</script>
<body>
<div id="wrap">
<div id="main">
<br>
<div class='itemtitle'>1.打开蓝牙</div>
<div class="clickbtn" tapmode="active" onclick="opbt()" >打开蓝牙</div>
<div class='itemtitle'>2.连接蓝牙</div>
<div class="clickbtn" tapmode="active" onclick="scanbt()" >连接蓝牙</div>
<div class='itemtitle'>3.读取数据</div>
<div class="clickbtn" tapmode="active" onclick="readbt()" >读取数据</div>
<div class='itemtitle'>3.写数据</div>
<div class="clickbtn" tapmode="active" onclick="writebt()" >写数据</div>
<div class='itemtitle'>4.notify</div>
<div class="clickbtn" tapmode="active" onclick="notifybt()" >notify</div>
<div class='itemtitle'>2.断开连接</div>
<div class="clickbtn" tapmode="active" onclick="disconnectbt()" >断开连接</div>
<div class='itemtitle'>3.关闭蓝牙</div>
<div class="clickbtn" tapmode="active" onclick="closebt()" >关闭蓝牙</div>
</div>
</div>
</body>
</html>
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