🏠 家庭煤气监测：随时随地查看煤气值 📱

这是个物联网IOT时代，万物互联的一天一定会到来。

今天介绍的是一个煤气IOT项目。

用到的模块如下
无论何时何地查看家里的煤气值图1

ESP8266

MQ7烟雾模块

连线图
代码部分
[mw_shl_code=applescript,true]//-----------gada888----------
#include <ESP8266WiFi.h>
String apiKey = "";
const char *ssid = "";
const char *pass = "";
const char* server = "api.thingspeak.com";
WiFiClient client;
void setup()
{
Serial.begin(115200);
delay(10);
Serial.println("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, pass);
while (WiFi.status() != WL_CONNECTED)
{
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
}
void loop()
{
float h = analogRead(A0);
if (isnan(h))
{
Serial.println("Failed to read from MQ-5 sensor!");
return;
}

if (client.connect(server, 80))
{
String postStr = apiKey;
postStr += "&field1=";
postStr += String(h/1023*100);
postStr += "r\n";
client.print("POST /update HTTP/1.1\n");
client.print("Host: api.thingspeak.com\n");
client.print("Connection: close\n");
client.print("X-THINGSPEAKAPIKEY: " + apiKey + "\n");
client.print("Content-Type: application/x-www-form-urlencoded\n");
client.print("Content-Length: ");
client.print(postStr.length());
client.print("\n\n");
client.print(postStr);
Serial.print("Gas Level: ");
Serial.println(h/1023*100);
Serial.println("Data Send to Thingspeak");
}
client.stop();
Serial.println("Waiting...");

// thingspeak needs minimum 15 sec delay between updates.
delay(1500);
}[/mw_shl_code]

-------------
String apiKey = ""; ----------thingspeak API密码
const char *ssid = ""; --------wifi名
const char *pass = "";---------wifi密码
------------以上三项要填个人的信息
无论何时何地查看家里的煤气值图4