硬件端端介绍

一. 系统拓扑图

蜂巢网关可以自动或者按需采集温湿度、PM2.5数据
蜂巢网关按照MQTT协议，将采集的数据上传到MQTT服务器
蜂巢网关可以控制风扇、灯光、蜂鸣器的动作
MQTT服务器配置设备、接收并存储设备数据
NODE-RED具备拖拽编程能力

二、程序框架介绍

蜂巢STM32底座程序，全部放在WIFI模块目录下
每个底座的STM32程序，按照keil开发工具常用标准，HARDWARD中是外设驱动代码，CORE是MCU核心代码，USER中是应用主程序和项目文件
蜂巢网关ESP32模块采用VS+IDF4.4开发，components中是公用外设驱动，main中是应用主程序

三、演示操作流程

1. 模拟项目背景

城市的污水管网状态数据采集、危险报警及云端运维。

2.操作步骤

1. 为演示效果，用PM2.5传感器代替甲烷传感器
1. 首先修改蜂巢网关的SMT32程序，将WIFI参数传递给WIFI模块，如果WIFI模块上面的三个LED指示灯全部亮，表示正确连接MQTT服务器。同时将网关设置为本地循环控制，网关流读取显示温湿度数据、 PM2.5浓度数据，同时主动上传到MQTT
1. PM2.5浓度大于阈限值，灯光闪烁报警、蜂鸣器报警，同时开启风扇；PM2.5浓度下降到阈值限值以下，灯光报警停止、蜂鸣器报警停止，同时风扇停止；
1. 在物联网平台，可以看到温湿度数据、PM2,5浓度值在MQTT中间件中以JSON结构显示。
1. 将蜂巢网关的SMT32程序修改为远程指令控制，在NODERED中可以发送指令获取数据；NODERED中设置温度阈值，用人体提高传感器温度，达到阈值后，NODERED自动下发指令启动风扇运行和开启LED灯光；温度下降到低于阈值后，NODERED自动下发指令停止风扇运行，关闭LED灯光。

四、蜂巢网关介绍

蜂巢网关配置的ESP32模块，已经将MQTT服务器接入参数写入模块NVS中，但是WIFI参数需实际情况修改。蜂巢网关底盒STM32可以通过串口将参数写入ESP32模块。
蜂巢网关可以通过修改配置参数，可以实现本地读取传感器数据，并按照阈值范围实现报警联动
蜂巢网关通过底盒的RS485总线与其他设备相连，实现数据的通讯

## 五、温湿度模块介绍

温湿度模块的地址、操作代码、数据代码，都在RS485.h中定义
温湿度模块，不会主动向485总线发送数据，485数据接收的处理在定时器3的中断中统一处理的，按照不同的指令代码，返回对应的数据到指令发送设备

六、PM2.5模块介绍

在主循环中，不停采集P,2.5数据，同时解析接收到的RS485指令，如果是采集PM2.5的，就发送PM2.5浓度数据道总线
可以通过吹气，改变PM2.5浓度数据，如果需要大幅改变，可以通过吹入香烟等测试

七、LED模块介绍

在定时器3中的中断中，处理接收到的RS485数据，如果是本设备控制指令，执行对应操作

八、风扇模块介绍

在定时器3的中断中处理RS485数据，如果是本设备控制指令，执行相关动作
分别用500、1200、1500定时器4的PWM参数来表达高速、中速、低速三种转速

九、蜂鸣器模块介绍

在定时器3的中断中处理RS485指令，如果是本机控制指令置对应标志
在主循环中判断动作标志，开启蜂鸣器或者关闭蜂鸣器
蜂鸣器开启有时间参数，即延时循环，因此不能再定时器3的中断中直接调用

八城工业物联网平台

谷歌浏览器打开网页 https://iiot.stepiot.com ，点击右上角【控制台】，如图：输入账号和密码，进行登录登录成功后，点击左侧【事务管理】->【设备管理】，选择相应的组，查看该组下所有设备

如果列表为空，需要把默认的勾选去掉：如图:

Node-RED使用

1. 进入界面

打开google浏览器，在输入网址处输入(http://127.0.0.1:1880 )，如下图：

2.控制设备

界面左上角搜索 mqtt ,如图

拖动网络下组别下的 mqtt out 模块到操作界面，如图双击mqtt控件，点击右侧新增一个mqtt-broker节点: 进入如下界面，点击【使用TLS】,添加新的tls-config节点，如图：进入如下界面：浏览器新建一个tab，进入八城工业物联网平台，找到对应组下的类型为【程序客户端客户端】的设备,如图点击【详情】，选择【连接信息】tab,下载Certificate File，Private Key File，RSA 2048 bit Amazon Root CA，如图：切换回Node-RED界面，把刚刚下载下来的三个密钥上传到该界面，证书对应 certificate.pem.crt文件，私钥对应 private.pem.key文件，CA证书对应 aws-root-ca.pem文件，并且记下Client ID，然后我们把名称设置为【程序客户端】如图：点击右上角【添加】后如图：服务端地址填上：a2kob4few2zw49-ats.iot.cn-northwest-1.amazonaws.com.cn 端口填上: 8883,客户端ID填入刚刚记下的Client ID,并在名称输入程序客户端，如图: 点击右上角【添加】，进入如图界面:

这里填入需要监控的设备的主题，主题在八城工业物联网平台的该设备【连接信息】下面，比如现在我们要监控教室里面【蜂巢网关】的信息，找到该设备，进入详情，点击【连接信息】tab，找到【设备连接信息】框，复制Data Topic 主题即可，如图：

将复制出来的主题复制到Node-RED平台的主题输入框里面，名称我们命名为【蜂巢网关】，如图：

点击右上角【完成】，信息框隐藏，然后点击右上角【部署】，完成部署。

主键左下角出现【已连接】的字样，即表示配置完成。如图：

至此，我们配置完成了一个蜂巢网关设备的mqtt配置。接下来我们编写解析函数。我们通过mqtt提前约定一个json格式，硬件端和平台端，可以通过这个json的字段约定来进行解释操作。我们约定的json格式如下:

下行

{
"thingname": "${thingname}",
"group": "${groupid}",
"topic": "${topic}",
"timestamp": "当前时间",                 //服务当前时间
"devicetype": "${devicetype}",
"cmd": [
        {
     	"led1":1,                     //LED1灯开关，1--打开；0--关闭
      "led2":1,                     //LED1灯开关，1--打开；0--关闭
      "led3":1,                     //LED1灯开关，1--打开；0--关闭
      "led4":1,                     //LED1灯开关，1--打开；0--关闭
     	"fan":1,                     //风扇控制0-关闭 1、2、3-档位
      "relay1":1                  //继电器控制
      "relay2":1                  //继电器控制
      "motor"：1                 //电机控制
      "SHT20GetAll":1        //获取SHT20数据(温度、湿度、光照)
      "HFRFIDGetAll":1        //读高频卡
      "gyrGetAngle":1       //获取陀螺仪角度
      "PIRGetState":1        //获取人体感应状态
      "GPSGetLocation":1    //获取GPS数据
      "ultrasonicGetDis"：1   //获取超声波距离
      "PM25GetConc"：1    //获取PM2.5浓度
      "flameGetState":1     //获取火焰传感器状态
      "shockGetCount"：1   //获取震动次数
      "heartGetCount":1    //获取心率值
      "LFRFIDGetAll":1     //读低频卡
      "APGetAltitude"：1   //获取大气压力(海拔高度)
      "PHGetState"：1     //获取光电开关状态
      "touchKeyGetState":1    //获取触摸按键状态
      "TFGetData":1          //获取TF卡数据
      "alcoholGetState"：1   //获取酒精传感器状态
      "alcoholGetData"：1   //获取酒精传感器数据
      "formaldehydeGetData"：1    //获取甲醛浓度数据
      "smokeGetState"：1     //获取烟雾传感器状态
      "smokeGetData"：1     //获取烟雾传感器数据
      "colorGetData"：1    //获取色彩传感器数据
      "noncontactTempGetData":1    //获取非接触式温度传感器数据
      "moistureGetData"：1    //获取土壤湿度数据
      "gestureGetAction"：1   //获取传感器动作
      "NFCGetID":1，          //获取NFC卡ID
      "BEEP":1 //1开0关
     }
    ]
}

下行

{
 "thingname": "${thingname}",
 "group": "${groupid}",
 "topic": "${topic}",
 "timestamp": "当前时间",
 "devicetype": "${devicetype}",
 "data"[
 {
   	"SHT20Temp":20,                //温度
     "SHT20Humi"：50                 //湿度
     "SHT20_Light"：100           //光照
     "matrixkey"：0      //按键值 0~9 enter canel up down left right 
     "preWeight"：40     //压力(重量)
     "HFFIDID"：4f3278    //高频卡ID
     "HFRFIDBlock"：xxxxx    //高频卡块数据
     "gyrAngle"：37     //陀螺仪角度
     "PIRState"：1      //人体红外状态
     "GPSLocation"：xxxx.xxxxxxxxx       //GPS经纬度数据
     "ultrasonicDis"：30             //超声波距离(cm)
     "PM25Conc"：10      //PM2.5浓度值
     "flameState"：1       //火焰传感器状态
     "shockCount"：32     //震动次数
     "heartCount"：80    //每分钟心跳次数
     "LFRFIDID"：xxxxxxx    //低频卡ID
     "LFRFIDBlock"xxxxxxxxxxxxxxx   //低频卡块数据
     "APAltitude"1800   //大气压力(海拔高度)
     "PHState"：1    //光电开关状态
     "touchKeyState"：1   //触摸开关状态
     "TFData"：xxxxxxxxxxxxxxx    //TF卡数据
     "alcoholData":47      //酒精浓度数据
     "alcoholState"：1      //酒精检测状态
     "formaldehydeData"：29   //甲醛浓度数据
     "smokeData"：89         //烟感浓度数据
     "smokeState"：1         //烟感状态
     "colorData"：255       //色彩传感器RGB数据
     "noncontactTempData"：23   //非接触式温度传感器数据
     "moistureData"：78      //土壤湿度数据
     "gesture_Action"：up    //up down left right beyond near
     "NFCID":xxxxxxxxxxxxx     //NFC卡ID
  }
 ]
}

左上角inject组件拖入操作区，如图：双击点开，设置如下，名称为：电灯:开，msg.payload为1，如图：点击完成，同样的流程，我们分别设置电灯:关，风扇:开，风扇:关，蜂鸣:开，蜂鸣:关，获取温湿度，获取PM2.5的命令值，他们依次为:2,3,4,5,6,7,8。设置完成后如图:

将左侧的function组件拖入操作区，如图：双击函数组件，复制如下代码：

var flag=msg.payload;
msg.payload={
    "thingname": "64107303e4b0dabda686037d",
    "group": "1528546145080545282",
    "topic": "stepiot/data/1271087791777910784/1528546145080545282/64107303e4b0dabda686037d",
    "timestamp": new Date().getTime(),
    "devicetype": "action_honeycomb_wifi",
    } 
if(flag===1){
   msg.payload.cmd=[{
		    "led1": 1,
		    "led2": 1,
		    "led3": 1,
		    "led4": 1
	    }]
}
if(flag===0){
    msg.payload.cmd= [{
		   "led1": 0,
		   "led2": 0,
		   "led3": 0,
		   "led4": 0
	    }]
}
if(flag===3){
    msg.payload.cmd= [{
		    "fan": 3
	    }]
}
if(flag===4){
    msg.payload.cmd= [{
		    "fan": 0
	    }]
}
if(flag===5){
    msg.payload.cmd= [{
		    "BEEP": 1
	    }]
}
if(flag===6){
    msg.payload.cmd= [{
		    "BEEP": 0
	    }]
}
if(flag===7){
    msg.payload.cmd= [{
		    "SHT20GetAll": 1
	    }]
}
if(flag===8){
    msg.payload.cmd= [{
		    "PM25GetConc": 1
	    }]
}
return msg;

然后们将他们连线起来，如图：点击右上角【部署】，就可以控制设备了

获取传感器设备数值

左上角搜索mqtt，将mqtt in组件拖入操作区，如图：双击该组件，服务器选择刚刚设置的程序客户端，主题填写刚刚复制的蜂巢网关主题，QoS设置为0，名称我们命名为蜂巢网关，如图: 左侧拖入function组件，如图: 双击函数，填入如下代码:

var payload=JSON.parse(msg.payload);
var exp=payload.data;
if(typeof(exp) != "undefined"){
    var PM25Conc=payload.data[0].PM25Conc;
    var SHT20Temp=payload.data[0].SHT20Temp;
    var SHT20Humi=payload.data[0].SHT20Humi;
    var intPM25=parseInt(PM25Conc);
    var intTemp=parseInt(SHT20Temp);
    var intHumi=parseInt(SHT20Humi);
if(intPM25>=0){
    payload.data[0].PM25Conc=intPM25;
}else{
    payload.data[0]=0;
}
if(intTemp>=0){
    payload.data[0].SHT20Temp=intTemp;
}else{
    payload.data[0].SHT20Temp=0;
}
if(intHumi>=0){
    payload.data[0].SHT20Humi=intHumi;
}else{
    payload.data[0].SHT20Humi=0;
}
}else{
    payload.data[0].PM25Conc=0;
    payload.data[0].SHT20Temp=0; 
    payload.data[0].SHT20Humi=0;
}
return msg;

点击完成左侧输入gauge，然后将组件拖入操作区，如图：双击gauge组件，添加新的ui_group节点，如图添加新的ui_tab节点，如图：然后填入传感设备，如图: 点击添加，然后再dashboard group窗口填上传感设备，如图：点击添加，然后再gauge节点的 Label输入温度， Value format输入框输入: ,Units输入摄氏度，如图：

点击完成，然后连接组件，如图然后浏览器输入: http://127.0.0.1:1880/ui 界面如下:

## 设备联动我们来设置当温度超过35摄氏度的时候，启动风扇,小于35摄氏度关闭风扇。首先，拖入function节点进入操作区,然后粘贴如下代码:

 var payload=JSON.parse(msg.payload);
var SHT20Temp=payload.data[0].SHT20Temp;
if(SHT20Temp>=35){
   msg.payload.cmd= [{
		    "fan": 3
	    }]
}else{
    msg.payload.cmd= [{
		    "fan": 0
	    }]
}
return msg;

界面如下:

点击完成，然后连接相应组件，如下:

附:

完整的Node-RED代码如下:

[{"id":"a2c459dc.b6e638","type":"tab","label":"蜂巢Node-RED","disabled":false,"info":""},{"id":"93b16947.19ce88","type":"mqtt in","z":"a2c459dc.b6e638","name":"蜂巢网关","topic":"stepiot/data/1691726982939774977/1691727242785296386/64dc8992e4b052be9999059e","qos":"0","datatype":"auto","broker":"891971a0.ab55f","nl":false,"rap":true,"rh":0,"x":480,"y":220,"wires":[["b8f421a2.20ce8","6dcf8d6a.6bf7c4"]]},{"id":"c673c724.0a6138","type":"function","z":"a2c459dc.b6e638","name":"","func":"var flag=msg.payload;\nmsg.payload={\n    \"thingname\": \"64dc8992e4b052be9999059e\",\n    \"group\": \"1691727242785296386\",\n    \"topic\": \"stepiot/data/1691726982939774977/1691727242785296386/64dc8992e4b052be9999059e\",\n    \"timestamp\": new Date().getTime(),\n    \"devicetype\": \"action_honeycomb_wifi\",\n    } \nif(flag===1){\n   msg.payload.cmd=[{\n\t\t    \"led1\": 1,\n\t\t    \"led2\": 1,\n\t\t    \"led3\": 1,\n\t\t    \"led4\": 1\n\t    }]\n}\nif(flag===0){\n    msg.payload.cmd= [{\n\t\t   \"led1\": 0,\n\t\t   \"led2\": 0,\n\t\t   \"led3\": 0,\n\t\t   \"led4\": 0\n\t    }]\n}\nif(flag===3){\n    msg.payload.cmd= [{\n\t\t    \"fan\": 3\n\t    }]\n}\nif(flag===4){\n    msg.payload.cmd= [{\n\t\t    \"fan\": 0\n\t    }]\n}\nif(flag===5){\n    msg.payload.cmd= [{\n\t\t    \"BEEP\": 1\n\t    }]\n}\nif(flag===6){\n    msg.payload.cmd= [{\n\t\t    \"BEEP\": 0\n\t    }]\n}\nif(flag===7){\n    msg.payload.cmd= [{\n\t\t    \"SHT20GetAll\": 1\n\t    }]\n}\nif(flag===8){\n    msg.payload.cmd= [{\n\t\t    \"PM25GetConc\": 1\n\t    }]\n}\nreturn 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