1、示例简介

在HaaS610开发板上把用户串口接收到的数据&＃xff0c;通过物模型把数据上传到阿里云物联网平台。本示例适合实时性要求不高、数据量不大的应用场景。

1.1、连接示例

通过USB转TLL串口线&＃xff08;3.3V &＃xff09;&＃xff0c;把PC与HaaS610的用户串口&＃xff08;上图序号 8处&＃xff09;连接起来。

1.2、流程

在PC上通过串口调试工具发送数据&＃xff0c;HaaS610 Kit收到数据后触发uart监听事件。HaaS610 Kit在uart监听事件回调函数中把数据通过MQTT发送到物联网平台指定Topic。

2、示例代码

app.js

var iot &＃61; require(&＃39;iot&＃39;);
var network &＃61; require(&＃39;network&＃39;);
var uart &＃61; require(&＃39;uart&＃39;);var net &＃61; network.openNetWorkClient();
var serial3 &＃61; uart.open({id: &＃39;serial3&＃39;
});function ArrayToString(fileData){var dataString &＃61; "";for (var i &＃61; 0; i }serial3.on(&＃39;data&＃39;, function(data) {var data_str &＃61; ArrayToString(data);console.log(&＃39;serial3:&＃39; &＃43; data_str);/* post props */device.postProps(&＃39;{\"serial3\": &＃39; &＃43; &＃39;\"&＃39; &＃43; data_str &＃43; &＃39;\"&＃39; &＃43; &＃39;}&＃39;);});var productKey &＃61; &＃39;xxxx&＃39;; /* your productKey */
var deviceName &＃61; &＃39;xxxx&＃39;; /* your deviceName */
var deviceSecret &＃61; &＃39;xxxx&＃39;; /* your deviceSecret */var device;
var topic &＃61; &＃39;/sys/&＃39; &＃43; productKey &＃43; &＃39;/&＃39; &＃43; deviceName &＃43; &＃39;/user/haas/info&＃39;;function createDevice() {device &＃61; iot.device({productKey: productKey,deviceName: deviceName,deviceSecret: deviceSecret,});device.on(&＃39;connect&＃39;, function () {console.log(&＃39;(re)connected&＃39;);/* 云端设置属性事件 */device.onProps(function (res) {console.log(&＃39;cloud req msg_id is &＃39; &＃43; res.msg_id);console.log(&＃39;cloud req params_len is &＃39; &＃43; res.params_len);console.log(&＃39;cloud req params is &＃39; &＃43; res.params);});/* 云端下发服务事件 */device.onService(function (res) {console.log(&＃39;received cloud msg_id is &＃39; &＃43; res.msg_id);console.log(&＃39;received cloud service_id is &＃39; &＃43; res.service_id);console.log(&＃39;received cloud params_len is &＃39; &＃43; res.params_len);console.log(&＃39;received cloud params is &＃39; &＃43; res.params);});});/* 网络断开事件 */device.on(&＃39;disconnect&＃39;, function () {console.log(&＃39;disconnect &＃39;);});/* mqtt消息 */device.on(&＃39;message&＃39;, function (res) {console.log(&＃39;mqtt message&＃39;)console.log(&＃39;mqtt topic is &＃39; &＃43; res.topic);console.log(&＃39;mqtt payload is &＃39; &＃43; res.payload);})/* 关闭连接事件 */device.on(&＃39;end&＃39;, function () {console.log(&＃39;iot client just closed&＃39;);});/* 发生错误事件 */device.on(&＃39;error&＃39;, function (err) {console.log(&＃39;error &＃39; &＃43; err);});
}var status &＃61; net.getStatus();
console.log(&＃39;net status is: &＃39; &＃43; status);if (status &＃61;&＃61; &＃39;connect&＃39;) {createDevice();
} else {net.on(&＃39;connect&＃39;, function () {createDevice();});
}

app.json

{"version": "1.0.0","io": {"serial3":{"type":"UART","port":2,"dataWidth":8,"baudRate":9600,"stopBits":1,"flowControl":"disable","parity":"none"}},"debugLevel": "DEBUG","repl": "enable"
}
开发者支持

如需更多技术支持&＃xff0c;可加入钉钉开发者群&＃xff0c;或者关注微信公众号。

更多技术与解决方案介绍&＃xff0c;请访问HaaS官方网站https://haas.iot.aliyun.com。