Arduino IDE: ESP-8266-MOD

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