基于ESP8266的大棚环境监测设计与实现

附录BH1750：intBH1750_Read(intaddress){inti=0;Wire.beginTransmission(address);Wire.requestFrom(address,2);while(Wire.available()){buff[i]=Wire.read();i++;}Wire.endTransmission();returni;}voidBH1750_Init(intaddress){Wire.beginTransmission(address);Wire.write(0x10);Wire.endTransmission();}在loop()中循环读取BH1750的值并进行处理输出inti;uint16_tval=0;if(2==BH1750_Read(BH1750address)){val=((buff[0]<<8)|buff[1])/1.2;Serial.print(val,DEC);}delay(1000);OLED:编写oled初始化及显示函数voidOLED_Init(){oled.begin(SSD1306_SWITCHCAPVCC,0x3C);//"SSD1306_SWITCHCAPVCC"表示显示器为OLEDoled.setTextColor(WHITE);//开像素点发光oled.clearDisplay();//清屏}voidOLED_ShowString(uint8_tx,uint8_ty,uint8_tfont_size,Stringstring){oled.setTextSize(font_size);//设置字体尺寸(>=1)oled.setCursor(x,y);//设置显示坐标oled.println(string);//显示内容oled.display();//开启显示}voidOLED_ShowNum(uint8_tx,uint8_ty,uint8_tfont_size,intNum){oled.setTextSize(font_size);oled.setCursor(x,y);oled.println(Num);oled.display();}通过字符串将我们读取到的光照强度和温湿度显示出来OLED_ShowString(1,9,2,"Temp:"+(String)temperature+"C");OLED_ShowString(1,27,2,"Hum:"+(String)humidity+"%");OLED_ShowString(1,45,2,"Light:"+(String)val);数据上报：constchar*dhttopic="temp01";String

msg="#"+(String)temperature+"#"+(String)humidity+"#"+ledstatus+"#"+val+"#"+beepstatus;//数据上传client.publish(dhttopic,msg.c_str());数据下发：

判断下发的数据是on还是offvoidcallback(char*topic,byte*payload,unsignedintlength){

Serial.print("Messagearrived[");

Serial.print(topic);

Serial.print("]");

StringMqtt_Buff="";

for(inti=0;i<length;i++){

Mqtt_Buff+=(char)payload[i];

}

Serial.print(Mqtt_Buff);

Serial.println();

//SwitchontheLEDifan1wasreceivedasfirstcharacter

if(Mqtt_Buff=="on"){//如果接收字符on,亮灯

turnOnLed();//开

}elseif(Mqtt_Buff=="off"){//如果接收字符off,亮灯

turnOffLed();//关

}

Mqtt_Buff="";}微信小程序：//

index.js//

获取应用实例const

app

=

getApp()import

mqtt

from

'../../utils/js/mqtt.min.js';//加载mqtt库Page({

data:

{

uid:"cb9e7a55986e43618c454c489688c6a4",//用户密钥,巴法云控制台获取

ledtopic:"SmartAgr01",//控制led的主题,mqtt控制台创建

dhttopic:"temp01",//传输温湿度的主题,控制台创建

device_status:"离线",//

显示led是否在线的字符串,默认离线

ledOnOff:"关闭",

beepOnOff:"正常",

checked:

false,//led的状态。默认led关闭

wendu:"",//温度值,默认为空

shidu:"",//湿度值,默认为空

light:"",//光照值,默认为空

ledicon:"/utils/img/lightoff.png",//显示led图标的状态。默认是关闭状态图标

client:

null,//mqtt客户端,默认为空

},

mqttConnect(){

var

that

=

this

//MQTT连接的配置

var

options=

{

keepalive:

60,

//60s

,表示心跳间隔

clean:

true,

//cleanSession不保持持久会话

protocolVersion:

4,

//MQTT

v3.1.1

clientId:this.data.uid

}

//初始化mqtt连接

this.data.client

=

mqtt.connect('wxs://:9504/wss',options)

//

连接mqtt服务器

this.data.client.on('connect',

function

()

{

console.log('连接服务器成功')

//订阅dht11温湿度主题

that.data.client.subscribe(that.data.dhttopic,

function

(err)

{

if

(err)

{

console.log(err)

}

})

})

//接收消息

that.data.client.on('message',

function

(topic,

message)

{

console.log(topic)

var

msg

=

message.toString()

if(topic

==

that.data.dhttopic){//如果是温湿度主题的消息

//假设上传的数据为#23#45#off,其中温度是23,湿度45,led为关闭状态

if(msg.indexOf("#")

!=

-1){//如果数据里包含#号,表示获取的是传感器值,因为单片机上传数据的时候用#号进行了包裹

//如果有#号就进行字符串分割

var

all_data_arr

=

msg.split("#");

//分割数据,并把分割后的数据放到数组里。

console.log(all_data_arr)//打印数组

if(all_data_arr[3]

!=

undefined){//判断是否上传了led状态

if(all_data_arr[3]

==

"on"){//如果单片机处于打开状态

that.setData({

//数据赋值给变量

ledOnOff:"打开",//赋值led状态

})

}else{

that.setData({

//数据赋值给变量

ledOnOff:"关闭",//赋值led状态

})

}

}

if(all_data_arr[5]

!=

undefined){//判断是否上传了led状态

if(all_data_arr[5]

==

"on"){//如果单片机处于打开状态

that.setData({

//数据赋值给变量

beepOnOff:"异常",//赋值led状态

})

}else{

that.setData({

//数据赋值给变量

beepOnOff:"正常",//赋值led状态

})

}

}

that.setData({

//数据赋值给变量

wendu:all_data_arr[1],//赋值温度

shidu:all_data_arr[2],

//赋值湿度

light:all_data_arr[4],

//赋值光照

})

}

}

//打印消息

console.log('收到消息：'+msg)

})

//断线重连

this.data.client.on("reconnect",

function

()

{

console.log("重新连接")

});

},//屏幕打开时执行的函数

onLoad()

{

//连接mqtt

this.mqttConnect()

//检查设备是否在线

this.getOnline()

//检查设备是打开还是关闭

this.getOnOff()

//获取服务器上现在存储的dht11数据

this.getdht11()

},

//控制灯的函数1,小滑块点击后执行的函数

onChange({

detail

}){

//detail是滑块的值,检查是打开还是关闭,并更换正确图标

this.setData({

checked:

detail,

});

if(detail

==

true){//如果是打开操作

this.data.client.publish(this.data.ledtopic,

'on')//mqtt推送on

this.setData({

ledicon:

"/utils/img/lighton.png",//设置led图片为on

});

}else{

this.data.client.publish(this.data.ledtopic,

'off')//mqtt推送off

this.setData({

ledicon:

"/utils/img/lightoff.png",//设置led图片为off

});

}

},

//点击led图片执行的函数

onChange2(){

var

that

=

this

//如果点击前是打开状态,现在更换为关闭状态,并更换图标,完成状态切换

if(

that.data.checked

==

true){

this.data.client.publish(this.data.ledtopic,

'off')

this.setData({

ledicon:

"/utils/img/lightoff.png",//设置led图片为off

checked:false

//设置led状态为false

});

}else{

//如果点击前是关闭状态,现在更换为打开状态,并更换图标,完成状态切换

this.data.client.publish(this.data.ledtopic,

'on')

that.setData({

ledicon:

"/utils/img/lighton.png",//设置led图片为on

checked:true//设置led状态为tr