Wireless Notice Board using GSM

Wireless Notice Board using GSM Or Arduino

First we should understand the purpose of this project, in this system we can display a message or notice to some display device like LCD, and this message can be easily set or changed from anywhere in the world, just by using the SMS facility of your mobile handset. Whatever notice we want to display, just send the SMS of that text, with some prefix and suffix.

This is very useful in Hotels, Malls, college, offices and can be used anywhere, even at home. Like you can set the message like “Stay At Home Plz...” at your hotel’s room gate, can set message at your home’s door step when you are away, and of course it is used as notice board in schools, colleges, cinema halls etc. And yes, it’s just not a simple Message board, the usefulness of this project is that you can set or change the message or notice from anywhere, just sending SMS from your phone.

Circuit Diagram :-

Code :-

//Prateek //www.prateeks.in #include <LiquidCrystal.h> LiquidCrystal lcd(7,6,5,4,3,2); int led=13; int temp=0,i=0,x=0,k=0; char str[100],msg[32]; void setup() { lcd.begin(16,2); 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(); }