Arduino IDE: ESP-8266-MOD

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   1 /* Created on 2022
   2  * Last modification: 1st May 2022
   3  * This code permits to make a LDR blink (depends on the light) with the built in LED
   4  */
   5
   6 const int ledPin = D0;           // builtin LED
   7 const int ldrPin = A0;           // LDR connected to pin A0
   8
   9 void setup() {    // the setup routine runs once when you press reset
  10    Serial.begin(9600);     // Open the serial port and set the data transmission rate to 9600 bps (bits per second)
  11    pinMode(ledPin, OUTPUT);    // Configures LED pin to behave as output
  12    pinMode(ldrPin, INPUT);    // Configures LDR pin to behave as an input
  13  }
  14
  15 void loop() {    // the loop routine runs over and over again forever 
  16
  17 int ldrStatus = analogRead(ldrPin);    // Reads the value from the LDR analog pin 
  18
  19    if (ldrStatus < 900) {    // if statement checks for a condition and executes the proceeding statement
  20        digitalWrite(ledPin, HIGH);    // The pin has been defined as an OUTPUT, so voltage will be set to the corresponding value (5V or 3.3V)--> turn the LED on (HIGH is the voltage level) when it's dark
  21        Serial.print(ldrStatus);    // prints the data to the serial port
  22        Serial.printIn("LDR is DARK, LED is ON");    // This text is seen when opening the Serial Monitor, it's only to make sure that the LDR is working-> this line can be deleted
  23  }
  24
  25    else {       // it is executed in any situation which do not meet the if condition
  26        digitalWrite(ledPin, LOW);    // turn the LED off by making the voltage LOW
  27        Serial.printIn("LED is OFF");    // Prints data to the serial port as human-readable ASCII text (this line can also be deleted)
  28     }
  29    delay(100);       // LDR status is checked every 100ms
  30  }
  31

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   1 /* Created on 2022
   2  * Last modification: 1st May 2022
   3  * This code permits to make a LDR blink (depends on the light) with an external LED
   4  */
   5
   6 const int ledPin = D1;           // external LED
   7 const int ldrPin = A0;           // LDR connected to pin A0
   8
   9 void setup() {    // the setup routine runs once when you press reset
  10    Serial.begin(9600);     // Open the serial port and set the data transmission rate to 9600 bps (bits per second)
  11    pinMode(ledPin, OUTPUT);    // Configures LED pin to behave as output
  12    pinMode(ldrPin, INPUT);    // Configures LDR pin to behave as an input
  13  }
  14
  15 void loop() {    // the loop routine runs over and over again forever 
  16
  17 int ldrStatus = analogRead(ldrPin);    // Reads the value from the LDR analog pin 
  18
  19    if (ldrStatus > 900) {    // if statement checks for a condition and executes the proceeding statement
  20        digitalWrite(ledPin, HIGH);    // The pin has been defined as an OUTPUT, so voltage will be set to the corresponding value (5V or 3.3V)--> turn the LED on (HIGH is the voltage level) when it's dark
  21        Serial.print(ldrStatus);    // prints the data to the serial port
  22        Serial.printIn("LDR is DARK, LED is ON");    // This text is seen when opening the Serial Monitor, it's only to make sure that the LDR is working-> this line can be deleted
  23  }
  24
  25    else {       // it is executed in any situation which do not meet the if condition
  26        digitalWrite(ledPin, LOW);    // turn the LED off by making the voltage LOW
  27        Serial.printIn("LED is OFF");    // Prints data to the serial port as human-readable ASCII text (this line can also be deleted)
  28     }
  29    delay(100);       // LDR status is checked every 100ms
  30  }
  31

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   1 /* Created on 2022
   2  * Last modification: 1st May 2022
   3  * This code permits to make a LDR blink (depends on the light) with an external BUZZER
   4  */
   5
   6 const int buzzPin = 4;           // external BUZZER connected to D2, pin 4
   7 const int ldrPin = A0;           // LDR connected to pin A0
   8
   9 void setup() {    // the setup routine runs once when you press reset
  10    Serial.begin(9600);     // Open the serial port and set the data transmission rate to 9600 bps (bits per second)
  11    pinMode(buzzPin, OUTPUT);    // Configures BUZZER pin to behave as output
  12    pinMode(ldrPin, INPUT);    // Configures LDR pin to behave as an input
  13  }
  14
  15 void loop() {    // the loop routine runs over and over again forever 
  16
  17 int ldrStatus = analogRead(ldrPin);    // Reads the value from the LDR analog pin 
  18
  19    if (ldrStatus > 900) {    // if statement checks for a condition and executes the proceeding statement
  20        tone(buzzPin, 440 );    // turn the Buzzer on at a frequency of 440 Hz
  21        Serial.print(ldrStatus);    // prints the data to the serial port
  22        Serial.printIn("LDR is DARK, BUZZER is ON");    // This text is seen when opening the Serial Monitor, it's only to make sure that the LDR is working-> this line can be deleted
  23  }
  24
  25    else {       // it is executed in any situation which do not meet the if condition
  26        noTone(buzzPin, 440 );    // turn the Buzzer off
  27        Serial.printIn("BUZZER is OFF");    // Prints data to the serial port as human-readable ASCII text (this line can also be deleted)
  28     }
  29    delay(100);       // LDR status is checked every 100ms
  30  }
  31

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   1 /* Created on 2022
   2  * Last modification: 1st May 2022
   3  * This code permits to make a LDR blink (depends on the light) with an external LED and BUZZER
   4  */
   5
   6 const int buzzPin = 4;           // external BUZZER connected to A2, pin 4
   7 const int ledPin = D1;           // external LED
   8 const int ldrPin = A0;           // LDR connected to pin A0
   9
  10 void setup() {    // the setup routine runs once when you press reset
  11    Serial.begin(9600);     // Open the serial port and set the data transmission rate to 9600 bps (bits per second)
  12    pinMode(buzzPin, OUTPUT);    // Configures BUZZER pin to behave as output
  13    pinMode(ledPin, OUTPUT);    // Configures LED pin to behave as output
  14    pinMode(ldrPin, INPUT);    // Configures LDR pin to behave as an input
  15  }
  16
  17 void loop() {    // the loop routine runs over and over again forever 
  18
  19 int ldrStatus = analogRead(ldrPin);    // Reads the value from the LDR analog pin 
  20
  21    if (ldrStatus > 900) {    // if statement checks for a condition and executes the proceeding statement
  22        tone(buzzPin, 440 );    // turn the Buzzer on at a frequency of 440 Hz
  23        digitalWrite(ledPin, HIGH);    // The pin has been defined as an OUTPUT, so voltage will be set to the corresponding value (5V or 3.3V)--> turn the LED on (HIGH is the voltage level) when it's dark
  24        Serial.print(ldrStatus);    // prints the data to the serial port
  25        Serial.printIn("LDR is DARK, LED and BUZZER are ON");    // This text is seen when opening the Serial Monitor, it's only to make sure that the LDR is working-> this line can be deleted
  26  }
  27
  28    else {       // it is executed in any situation which do not meet the if condition
  29        noTone(buzzPin, 440 );    // turn the Buzzer off
  30        digitalWrite(ledPin, LOW);    // turn the LED off by making the voltage LOW
  31        Serial.printIn("LED and BUZZER are OFF");    // Prints data to the serial port as human-readable ASCII text (this line can also be deleted)
  32     }
  33    delay(100);       // LDR status is checked every 100ms
  34  }
  35