Arduino IDE: ESP-8266-MOD

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   1 /* Created on 2022
   2  *Last modification: 25th April 2022
   3  *by Villares
   4  */
   5
   6 const int ledPin = 5;           // LED connected to pin number 5 (D1)
   7 const int pinBuzzer = 4;           // Buzzer connected to pin number 4 (D2)
   8
   9 void setup() {    // the setup routine runs once when you press reset
  10    pinMode(ledPin, OUTPUT);    // Configures LED pin to behave as an output
  11    pinMode(pinBuzzer, OUTPUT);    // Configures BUZZER pin to behave as an output
  12  }
  13
  14 void SOS(int n) {    // the SOS function is created, substituting the value n we can create 3 dots (S) or 3 dashes (O)
  15    digitalWrite(ledPin, HIGH);    // turn the LED on (HIGH is the voltage level)
  16    tone(pinBuzzer, 440);    // turn the Buzzer on at a frequency of 440 Hz
  17    delay(n);       // wait for n seconds
  18
  19    digitalWrite(ledPin, LOW);    // turn the LED off by making the voltage LOW
  20    noTone(pinBuzzer);    // turn the Buzzer off
  21    delay(500);      // wait for 0.5 seconds
  22
  23    digitalWrite(ledPin, HIGH);
  24    tone(pinBuzzer, 440);
  25    delay(n);
  26
  27    digitalWrite(ledPin, LOW);
  28    noTone(pinBuzzer);
  29    delay(500);
  30
  31    digitalWrite(ledPin, HIGH);
  32    tone(pinBuzzer, 440);
  33    delay(n);
  34
  35    digitalWrite(ledPin, LOW);
  36    noTone(pinBuzzer);
  37    delay(1500);    // space between letters is three units
  38  }
  39
  40 void silence() {    // the silence function is created for the space between words
  41    digitalWrite(ledPin, LOW);
  42    noTone(pinBuzzer);
  43    delay(2000);    // space between words is seven units (in the SOS function there are already 3 units, so this delay is for 4 units)
  44  }
  45
  46 void loop() {    // the loop routine runs over and over again forever
  47   SOS(500);    // for the SOS function, we substitute the value n per 0.5s--> 3 dots
  48   SOS(1500);    // for the SOS function, we substitute the value n per 1.5s--> 3 dashes
  49   SOS(500);    // for the SOS function, we substitute the value n per 0.5s--> 3 dots
  50   silence();    // the silence function is called--> space between words is seven units
  51  }
  52