JavaScript照样能打！JS版的温湿度上云来啦

Dear 丶 2022-09-08 03:56 76阅读 0赞

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# 案例介绍 #

基于HaaS EDU K1开发，通过I2C采集温湿度的数据，并且通过IoT组件上云的JavaScript轻应用案例。

# 简介 #

本案例主要分为三个部分：

1.  环境准备
2.  温湿度数据采集
3.  数据上云

# 环境准备 #

1.烧写支持轻应用的HaaS Edu K1开发板

2.下载VScode软件，并且安装HaaS Studio插件

## 固件烧写 ##

案例是基于JavaScript轻应用，需要能运行javascript代码的硬件环境，需要保证HaaS Edu K1烧写了支持JavaScript轻应用固件，操作步骤如下。

### 创建项目 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBASGFhU-aKgOacr-ekvuWMug_size_54_color_FFFFFF_t_70_g_se_x_16][]

等待下载

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBASGFhU-aKgOacr-ekvuWMug_size_54_color_FFFFFF_t_70_g_se_x_16 1][]

创建成功，跳转到新项目。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBASGFhU-aKgOacr-ekvuWMug_size_54_color_FFFFFF_t_70_g_se_x_16 2][]

### 编译烧写 ###

以HaaS EDU K1为例

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBASGFhU-aKgOacr-ekvuWMug_size_53_color_FFFFFF_t_70_g_se_x_16][]

### 编译 ###

编译成功

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBASGFhU-aKgOacr-ekvuWMug_size_54_color_FFFFFF_t_70_g_se_x_16 3][]

### 烧写 ###

选择串口

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBASGFhU-aKgOacr-ekvuWMug_size_54_color_FFFFFF_t_70_g_se_x_16 4][]  
烧写中

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBASGFhU-aKgOacr-ekvuWMug_size_54_color_FFFFFF_t_70_g_se_x_16 5][]   
烧写成功

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBASGFhU-aKgOacr-ekvuWMug_size_54_color_FFFFFF_t_70_g_se_x_16 6][]

# 温湿度采集 #

**说明：**案例开发基于HaaS Edu K1单板自带温湿度模块Si7006，具体参考[硬件资源][Link 1]

## 代码编写 ##

// app.js
    import * as i2c from 'i2c';
    
    
    // 初始化对应的I2C
    let sensor = i2c.open({
     id: 'sensor',
     success: function () {
       // 初始化成功
       console.log('open i2c success')
     },
    
     fail: function () {
       // 初始化失败
       console.log('open i2c failed')
     }
    
    });
    
    
    
    setInterval(function () {
     // 切换成温度模式
     sensor.write([0xF3]);
     sleepMs(30)
     // 代码功能：原始数据格式为[142,124]转成0x8e7c，再解析成数值36476
     var tempData = Number('0x' + sensor.read(2).map((i) => ((i < 10 ?  '0': '') + i.toString(16))).toString().replace(/,/g, ''));
     // 温度公式，可参考Si7006的datasheet
     var temp = ((175.72 * tempData) / 65536 - 46.85).toFixed(2);
     console.log('temp data is ' + temp);
    
    
     sleepMs(30);
    
    
     // 切换成湿度模式
     sensor.write([0xF5]);
     sleepMs(30);
     // 代码功能：原始数据格式为[142,124]转成0x8e7c，再解析成数值36476
     var humiData = Number('0x' + sensor.read(2).map((i) => ((i < 10 ?  '0': '') + i.toString(16))).toString().replace(/,/g, ''));
     // 湿度公式，可参考Si7006的datasheet
     var humi = ((125 * humiData) / 65536 - 6).toFixed(2);
     console.log('humi data is ' + humi);
    }, 1000);
    
    
    
    // app.json
    {
       "version": "1.0.0",
       "io": {
           "sensor": {
               "type": "I2C",
               "port": 1,
               "addrWidth": 7,
               "freq": 400000,
               "mode": "master",
               "devAddr": 64
           }
       },
       "debugLevel": "DEBUG"
    }

# 数据上云 #

上云分两部分展开，一部分是云端配置，一部分是代码编写。

> **说明：**使用netmgr组件连接网络，再通过iot将采集到的数据上传云端。

## 云端配置 ##

### 1.进入[物联网平台][Link 2] ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBASGFhU-aKgOacr-ekvuWMug_size_74_color_FFFFFF_t_70_g_se_x_16][]

### 2.创建产品 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBASGFhU-aKgOacr-ekvuWMug_size_65_color_FFFFFF_t_70_g_se_x_16][]

### 3.创建产品配置 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBASGFhU-aKgOacr-ekvuWMug_size_35_color_FFFFFF_t_70_g_se_x_16][]

### 4.查看产品详情 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBASGFhU-aKgOacr-ekvuWMug_size_72_color_FFFFFF_t_70_g_se_x_16][]

### 5.定义物模型 ###

(1)创建湿度模型

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBASGFhU-aKgOacr-ekvuWMug_size_65_color_FFFFFF_t_70_g_se_x_16 1][]

(2)创建温度模型

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBASGFhU-aKgOacr-ekvuWMug_size_65_color_FFFFFF_t_70_g_se_x_16 2][]

### 6.创建设备 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBASGFhU-aKgOacr-ekvuWMug_size_65_color_FFFFFF_t_70_g_se_x_16 3][]

### 7.获取登录信息 ###

> 说明：获取productKey, deviceName, deviceSecret填入代码中

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBASGFhU-aKgOacr-ekvuWMug_size_66_color_FFFFFF_t_70_g_se_x_16][]

## 代码编写 ##

// app.js
    
    import * as i2c from 'i2c';
    
    import * as netmgr from 'netmgr';
    
    import * as iot from 'iot';
    
    
    
    let sensor = i2c.open({
    
     id: 'sensor',
    
     success: function () {
    
       console.log('open i2c success')
    
     },
    
     fail: function () {
    
       console.log('open i2c failed')
    
     }
    
    });
    
    
    
    function uploadData(iotdev) {
    
     // 获取云端下发的消息
    
     iotdev.onService(function(service) {
    
       console.log('received cloud service id ' + service.service_id);
    
       console.log('received cloud service param  ' + service.params);
    
       console.log('received cloud service param len  ' + service.params_len);
    
     });
    
     // 云端收到上报下发的消息
    
     iotdev.onProps(function(properity) {
    
       console.log('received cloud properity param ' + properity.params);
    
       console.log('received cloud properity param len ' + properity.params_len);
    
     });
    
     // 每一秒钟上报温湿度数据
    
     setInterval(function () {
    
       sensor.write([0xF3]);
    
       sleepMs(30)
    
       // 代码功能：原始数据格式为[142,124]转成0x8e7c，再解析成数值36476
    
       var tempData = Number('0x' + sensor.read(2).map((i) => ((i < 16 ?  '0': '') + i.toString(16))).toString().replace(/,/g, ''));
    
       console.log('tempData:', tempData);
    
       var temp = ((175.72 * tempData) / 65536 - 46.85);
    
       console.log('temp data is ' + temp);
    
    
    
       sleepMs(30);
    
    
    
       sensor.write([0xF5]);
    
       sleepMs(30);
    
       // 代码功能：原始数据格式为[142,124]转成0x8e7c，再解析成数值36476
    
       var humiData = Number('0x' + sensor.read(2).map((i) => ((i < 16 ?  '0': '') + i.toString(16))).toString().replace(/,/g, ''));
    
       var humi = ((125 * humiData) / 65536 - 6);;
    
       console.log('humi data is ' + humi);
    
    
    
       // 上报数据到云端
    
       iotdev.postProps(
    
           JSON.stringify({
    
               Humidity: humi,
    
               Temperature: temp,
    
           })
    
       );
    
     }, 1000);
    
    }
    
    
    
    function iotDeviceCreate() {
    
     const productkey = 'xxxxxx';     //请输入您的pk
    
     const devicename = 'xxxxxx';    //请输入您的dn
    
     const devicesecret = 'xxxxxx';   //请输入您的ds
    
     // 初始化IoT连接
    
     let iotdev = iot.device({
    
         productKey: productkey,
    
         deviceName: devicename,
    
         deviceSecret: devicesecret
    
     });
    
     // IoT连接成功
    
     iotdev.on('connect', function () {
    
         console.log('success connect to aliyun iot server');
    
         // 上报数据
    
         uploadData(iotdev);
    
     });
    
    
    
     // IoT重新连接
    
     iotdev.on('reconnect', function () {
    
         console.log('success reconnect to aliyun iot server');
    
     });
    
     // IoT断开连接
    
     iotdev.on('disconnect', function () {
    
         console.log('aliyun iot server disconnected');
    
     });
    
    }
    
    
    
    // 初始化网络，基于wifi的连接
    
    var network = netmgr.openNetMgrClient({
    
     name: '/dev/wifi0'
    
    });
    
    
    
    // 连接网络
    
    network.connect({
    
     ssid: 'xxxxx',             //请替换为自己的热点ssid
    
     password: 'xxxxx'      //请替换为自己热点的密码
    
    });
    
    
    
    // 连接失败的监听
    
    network.on('error', function () {
    
     console.log('error ...');
    
    });
    
    
    
    // 连接成功的监听
    
    network.on('connect', function () {
    
     console.log('net connect success');
    
     // 连接成功后建立IoT连接
    
     iotDeviceCreate();
    
    });
    
    
    
    // app.json
    
    {
    
       "version": "1.0.0",
    
       "io": {
    
           "sensor": {
    
               "type": "I2C",
    
               "port": 1,
    
               "addrWidth": 7,
    
               "freq": 400000,
    
               "mode": "master",
    
               "devAddr": 64
    
           }
    
       },
    
       "debugLevel": "DEBUG"
    
    }

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[Link 1]: https://blog.csdn.net/HaaSTech/article/details/114305581
[Link 2]: https://iot.console.aliyun.com/
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