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Arduino & GSM Based Electronic Notice Board
Just Do Electronics
March 28, 2021
Code And Circuit Diagram :-
Code :-
//Prateek //www.prateeks.in #include
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(); }
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Video :-
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