GSM 900 Sending SMS AT different temperature level using Arduinomega2560

Projects Programming
1

This is my small project .Arduino will send one alert SMS through GSM Module at different temperature level.

component details:-

1] Arduino Mega 2560

2] Temperature sensor.

3] GSM 900A Module.

Here is my code:-

#include <OneWire.h>
#include <DallasTemperature.h>
#include <SoftwareSerial.h>
#include <Wire.h>
SoftwareSerial GPRS(10, 11);
#define ONE_WIRE_BUS A0//sensor connected to A0 pin
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
int TempState = 0;
int TempState1 = 0;
int TempState2 = 0;
float temp;
void setup() {
  Serial.begin(9600);
  GPRS.begin(9600);
  sensors.begin();
  GPRS.println("AT+CMGF=1");
  delay(500);
  GPRS.print("AT+CNMI=2,2,0,0,0\r");
  delay(100);
}
void loop() {
  sensors.requestTemperatures();
  temp = sensors.getTempCByIndex(0);
  Serial.print("Temperature is");
  Serial.print(temp);// temp in celcius
  if ( temp >= 31 ) {

    while (TempState < 1) {
      Temp_sms1();
    }
  }
  if ( temp >= 32 ) {

    while (TempState1 < 1) {
      Temp_sms2();
    }
  }

  if ( temp >= 33 ) {

    while (TempState2 < 1) {
      Temp_sms3();
    }
  }
}
void Temp_sms1() {
  sensors.requestTemperatures();
  temp = sensors.getTempCByIndex(0);
  char Temp1[8];
  dtostrf(temp, 7, 2, Temp1);// converted in to sting
  String message = String (" temp High : ") + Temp1;
  Serial.println(message);
  GPRS.println("AT+CMGF=1");
  delay(1000);
  GPRS.println("AT+CMGS=\"+919575610284\"");
  delay(1000);
  GPRS.println(message);
  delay(1000);
  GPRS.println((char)26);
  delay(800);
  Serial.println("SMS SEND");
  TempState++;
}
void Temp_sms2() {
  sensors.requestTemperatures();
  temp = sensors.getTempCByIndex(0);
  char Temp1[8];
  dtostrf(temp, 7, 2, Temp1);
  String message = String (" temp High : ") + Temp1;
  Serial.println(message);
  GPRS.println("AT+CMGF=1");
  delay(1000);
  GPRS.println("AT+CMGS=\"+919575610284\"");
  delay(1000);
  GPRS.println(message);
  delay(1000);
  GPRS.println((char)26);
  delay(800);
  Serial.println("SMS SEND");
  TempState1++;
}
void Temp_sms3() {
  sensors.requestTemperatures();
  temp = sensors.getTempCByIndex(0);
  char Temp1[8];
  dtostrf(temp, 7, 2, Temp1);
  String message = String (" temp High : ") + Temp1;
  Serial.println(message);
  GPRS.println("AT+CMGF=1");
  delay(1000);
  GPRS.println("AT+CMGS=\"+919575610284\"");
  delay(1000);
  GPRS.println(message);
  delay(1000);
  GPRS.println((char)26);
  delay(800);
  Serial.println("SMS SEND");
  TempState2++;
}

!!! This working fine !!!

Can anybody help me to reduce the size of this program while maintaining all the conditions

2

One thing you could do is to note that your Temp_smsN functions are very similar. The only difference appears to be which TempState variable they increment. Make the function take a reference to an int as a parameter, pass whichever TempState variable is appropriate and you will only need one function instead of the three.

Why do you need to make it smaller?

3

wildbill:
One thing you could do is to note that your Temp_smsN functions are very similar. The only difference appears to be which TempState variable they increment. Make the function take a reference to an int as a parameter, pass whichever TempState variable is appropriate and you will only need one function instead of the three.

Why do you need to make it smaller?

I am not well expert in programing,Tempstate i have used in this program for execute the function only one time..
Absence of Tempstate GSM will send SMS continuously.
Humbly request you to post the major changes i have to make in the program

4

Your use of the String type is completely unnecessary. This code:

sreekanthmp:

  String message = String (" temp High : ") + Temp1;

Serial.println(message);

Should be written like this:

Serial.print(" temp High : ");
Serial.println(Temp1);

If you want to reduce the amount of program memory, use the F() macro on your string literals. For example:

GPRS.println(F("AT+CMGF=1"));

Serial.print(F(" temp High : "));