Arduino & GSM Based Electronic Notice Board

Code And Circuit Diagram :-

Code :-

 

//Prateek
//www.prateeks.in

#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);

int led = 13;

int temp = 0, i = 0, x = 0, k = 0;
char str[100], msg[32];

void setup()
{
  lcd.init();
  lcd.backlight();
  Serial.begin(9600);
  pinMode(led, OUTPUT);
  digitalWrite(led, HIGH);
  lcd.print("GSM Initilizing...");
  gsm_init();
  lcd.setCursor(0, 0);
  lcd.print("Wireless Notice");
  lcd.setCursor(0, 1);
  lcd.print("    Board      ");
  delay(2000);
  lcd.clear();
  lcd.print("  Prateek");
  delay(1000);
  lcd.setCursor(0, 1);
  lcd.print("System Ready");
  Serial.println("AT+CNMI=2,2,0,0,0");
  delay(500);
  Serial.println("AT+CMGF=1");
  delay(1000);
  digitalWrite(led, LOW);
}

void loop()
{
  for (unsigned int t = 0; t < 60000; t++)
  {
    serialEvent();
    if (temp == 1)
    {
      x = 0, k = 0, temp = 0;
      while (x < i)
      {
        while (str[x] == '#')
        {
          x++;
          while (str[x] != '*')
          {
            msg[k++] = str[x++];
          }
        }
        x++;
      }
      msg[k] = '\0';
      lcd.clear();
      lcd.print(msg);
      delay(1000);
      temp = 0;
      i = 0;
      x = 0;
      k = 0;
    }
  }
  lcd.scrollDisplayLeft();
}
void serialEvent()
{
  while (Serial.available())
  {
    char ch = (char)Serial.read();
    str[i++] = ch;
    if (ch == '*')
    {
      temp = 1;
      lcd.clear();
      lcd.print("Message Received");
      delay(500);
    }
  }
}

void gsm_init()
{
  lcd.clear();
  lcd.print("Finding Module..");
  boolean at_flag = 1;
  while (at_flag)
  {
    Serial.println("AT");
    while (Serial.available() > 0)
    {
      if (Serial.find("OK"))
        at_flag = 0;
    }
    delay(1000);
  }

  lcd.clear();
  lcd.print("Module Connected..");
  delay(1000);
  lcd.clear();
  lcd.print("justdoelectronic");
  boolean echo_flag = 1;
  while (echo_flag)
  {
    Serial.println("ATE0");
    while (Serial.available() > 0)
    {
      if (Serial.find("OK"))
        echo_flag = 0;
    }
    delay(2000);
  }

  lcd.clear();
  lcd.print("www.prateeks.in");
  delay(2000);
  lcd.clear();
  lcd.print("Finding Network..");
  boolean net_flag = 1;
  while (net_flag)
  {
    Serial.println("AT+CPIN?");
    while (Serial.available() > 0)
    {
      if (Serial.find("+CPIN: READY"))
        net_flag = 0;
    }
    delay(1000);
  }
  lcd.clear();
  lcd.print("Network Found..");
  delay(1000);
  lcd.clear();
}

.

Video :-