Anti sleep alarm circuit

 Transmitter:

Receiver:

Arduino code:

#define Relay 13

#define buzzer A0

static const int sensorPin = 10;                    // sensor input pin 

int SensorStatePrevious = LOW;                      // previousstate of the sensor

unsigned long minSensorDuration = 3000; // Time we wait before  the sensor active as long 

unsigned long minSensorDuration2 = 6000;

unsigned long SensorLongMillis;                // Time in ms when the sensor was active

bool SensorStateLongTime = false;                  // True if it is a long active

const int intervalSensor = 50;                      // Time between two readings sensor state

unsigned long previousSensorMillis;                 // Timestamp of the latest reading

unsigned long SensorOutDuration;                  // Time the sensor is active in ms

//// GENERAL ////

unsigned long currentMillis;          // Variabele to store the number of milleseconds since the Arduino has started

void setup() {

  Serial.begin(9600);                 // Initialise the serial monitor

  pinMode(sensorPin, INPUT);          // set sensorPin as input

  Serial.println("Press button");

  pinMode(Relay,OUTPUT);

  pinMode(buzzer,OUTPUT);

}

// Function for reading the sensor state

void readSensorState() {

  // If the difference in time between the previous reading is larger than intervalsensor

  if(currentMillis - previousSensorMillis > intervalSensor) {

    

    // Read the digital value of the sensor (LOW/HIGH)

    int SensorState = digitalRead(sensorPin);    

    // If the button has been active AND

    // If the sensor wasn't activated before AND

    // IF there was not already a measurement running to determine how long the sensor has been activated

    if (SensorState == LOW && SensorStatePrevious == HIGH && !SensorStateLongTime) {

     SensorLongMillis = currentMillis;

       SensorStatePrevious = LOW;

      

      Serial.println("Button pressed");

    }

    // Calculate how long the sensor has been activated

   SensorOutDuration = currentMillis - SensorLongMillis;

    // If the button is active AND

    // If there is no measurement running to determine how long the sensor is active AND

    // If the time the sensor has been activated is larger or equal to the time needed for a long active

    if (SensorState == LOW && !SensorStateLongTime && SensorOutDuration >= minSensorDuration) {

      SensorStateLongTime = true;

      digitalWrite(Relay,HIGH);

      Serial.println("Button long pressed");

    }

    if (SensorState == LOW && SensorStateLongTime && SensorOutDuration >= minSensorDuration2) {

     SensorStateLongTime = true;

      digitalWrite(buzzer,HIGH);

      delay(1000);

      Serial.println("Button long pressed");

    }

      

    // If the sensor is released AND

    // If the sensor was activated before

    if (SensorState == HIGH && SensorStatePrevious == LOW) {

      SensorStatePrevious = HIGH;

      SensorStateLongTime = false;

      digitalWrite(Relay,LOW);

      digitalWrite(buzzer,LOW);

      Serial.println("Button released");

  

    }

    

    // store the current timestamp in previousSensorMillis

   previousSensorMillis = currentMillis;

  }

}

void loop() {

  currentMillis = millis();    // store the current time

  readSensorState();           // read the sensor state

  

}