Missed call based Motor On & Off and get Current Temperature & Humidity

Requirement:

1. Arduino UNO X 1

2. DHT22 Temperature & Humidity Sensor X 1

3. SIM 900 GSM Module X 1

4. Relay Module 5 Volt X 1

5. Power Supply 12 Volt 1 A.

6. CD 4017 Decade Counter IC

Circuit:

Code:

#include "SIM900.h"

#include <SoftwareSerial.h>

#include "call.h"

#include <DHT.h>

#include "sms.h"

int gsmTx = 3; // TX- pin to Arduino Pin D2

int gsmRx = 2; // RX- pin to Arduino Pin D3

int LED=11;

char phone_number[20];

char user_phone_number[] = "+918920251271"; //DEFINE YOUR USER CELLPHONE NUMBER

SMSGSM sms;

#define DHTPIN 7 //DHT Output Pin connect to Arduino Pin 7

#define DHTTYPE DHT11

CallGSM call;

boolean started=false;

char sms_text[160];

DHT dht(DHTPIN, DHTTYPE);

void setup()

{

pinMode(LED,OUTPUT);

digitalWrite(LED,LOW);

pinMode(DHTPIN, INPUT);

dht.begin();

Serial.begin(9600);

if (gsm.begin(9600))

{

Serial.println("\nstatus=READY");

started=true;

} else

Serial.println("\nstatus=IDLE");

}

void loop()

{

float humidity, temperature;

String smsText ="";

switch (call.CallStatus())

{

case CALL_NONE: // Nothing is happening

break;

case CALL_INCOM_VOICE : // Yes! Someone is calling us

Serial.println("RECEIVING1 CALL");

delay(1000);

call.HangUp();

delay(3000);

Serial.println("CALL1 HANGUP");

digitalWrite(LED,HIGH);

delay(300);

digitalWrite(LED,LOW);

humidity = dht.readHumidity();

temperature = dht.readTemperature();

delay(2000);

smsText = "Temperature: "+String(temperature,1)+"C Humidity: "+String(humidity,1)+"%";

smsText.toCharArray(sms_text,160);

//Serial.println(smsText);

sms.SendSMS("XXXXXXXXXX",sms_text);// Set your mobile No. on which you receive the SMS

break;

case CALL_COMM_LINE_BUSY: // In this case the call would be established

Serial.println("TALKING. Line busy.");

break;

}

delay(1000);

}