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main.ino
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#define BUTTON 8
#define RELAY 9
#define TEMP A5
#include <avr/wdt.h>
const String ssid="ssid";
const String pass="password";
String text;
bool state=true;
String request;
float temperature;
void serverSet()
{
Serial.println("AT+CIPSERVER=1,80");
(!Serial.find("OK"));
}
void connectNetwork(String ssid,String password)
{
Serial.println("AT+CWJAP=\""+ssid+"\",\""+password+"\"");
while(!Serial.find("WIFI GOT IP"));
delay(10);
Serial.println("AT+CWMODE=1");
while(!Serial.find("OK"));
delay(10);
Serial.println("AT+CIPMUX=1");
while(!Serial.find("OK"));
delay(10);
}
float readTemp()
{
int analogData = analogRead(TEMP);
float mVoltage = (float(analogData)/1023)*5000;
float temperature = mVoltage / 10.0;
return temperature;
}
void setup() {
pinMode(13,OUTPUT);
digitalWrite(13,LOW);
Serial.begin(115200);
wdt_enable(WDTO_8S);
wdt_reset();
connectNetwork( ssid, pass);
wdt_reset();
pinMode(BUTTON,INPUT);//button
Serial.println("AT");
while(!Serial.find("OK"));
serverSet();
wdt_reset();
Serial.println("AT+CIFSR");
Serial.println(Serial.readString());
Serial.println("AT");
while(!Serial.find("OK"));
pinMode(RELAY,OUTPUT);
wdt_reset();
loop();
}
int count;
void loop() {
count=0;
while(!Serial.find(",CONNECT"))
{
wdt_reset();
digitalWrite(13,HIGH);
if(digitalRead(BUTTON))
{
state=!state;
}
if(state)//state is on
{
text="<br>Click <a href=\"/LED=OFF\">here</a> turn the LED OFF<br>";
digitalWrite(RELAY,HIGH);
}
else//state is off
{
text="<br>Click <a href=\"/LED=ON\">here</a> turn the LED ON<br>";
digitalWrite(RELAY,LOW);
}
count++;
if(count==3600)//reset every 1 hour if no request arrived
{
setup();
}
}
request=Serial.readStringUntil("\n");
if(request.indexOf(" /LED=ON")!=-1)// on valid
{
state=true;
}
if(request.indexOf(" /LED=OFF")!=-1)// off valid
{
state=false;
}
if(state)//state is on
{
text="<br>Click <a href=\"/LED=OFF\">here</a> turn the LED OFF<br>";
digitalWrite(RELAY,HIGH);
}
else//state is off
{
text="<br>Click <a href=\"/LED=ON\">here</a> turn the LED ON<br>";
digitalWrite(RELAY,LOW);
}
temperature=readTemp();
String sendData=String("HTTP/1.1 200 OK\r\n") +
"Content-Type: text/html\r\nConnection: close\r\n\r\n<!DOCTYPE HTML>" +
"<html>"+text+"<br>Temperature:"+String(temperature)+"<br></html>\r\n";
Serial.print("AT+CIPSEND=0,");
Serial.println(sendData.length());
while(!Serial.find(">"));
Serial.println(sendData);
while(!Serial.find("SEND OK"));
Serial.println("AT+CIPCLOSE=0");
delay(200);
}