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Thermometer bewegingsmelder en clock

Thermometer bewegingsmelder en clock

Screenshot 2025-03-22 110222.jpg

Aansuitschema

PIR Bewegingsmelder

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Van onder gezien van links naar rechts

  • Plus 5V
  • Signaal naar Pin 12 Arduino Leonarde.
  • Min

Signaal naar Digitaal pin 12 Arduono Leonarde

Clock DS 3231

Untitled.jpg

Screenshot 2025-03-22 184122.jpg

http://www.rinkydinkelectronics.com/library.php?id=73

  • SCL naar SCL op Arduino (op Leonarde meest rechter pin)
  • SDA naar SDA op Arduino (op Leonarde op een na meest rechter pin)
  • Plus 3.3V
  • Min 

Thermometer

  • naar pin 4 Arduino Leonarde
  • Plus 3.3V
  • Min

Display

Zie https://www.roc.ovh/books/arduino/page/display

Code

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#include <DS3231.h>

#define DHTPIN 4                // Pin connected to the DHT11 data pin
#define DHTTYPE DHT11           // Specify DHT11 sensor
#define SIGNAL_INTERVAL 600000  // 10 minutes

DHT dht(DHTPIN, DHTTYPE);

DS3231 myRTC;
bool century = false;
bool h12Flag;
bool pmFlag;

int count = 0;
int pirPin = 12;            // Pin for the HC-S501 sensor
int pirValue;  

LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27, 16, 2);
unsigned long previousMillis = 0;
const long dhtInterval = 2000; // Interval for DHT readings

// Custom characters for the LCD arrows
byte downChar[] = {
  B00000,
  B00000,
  B00100,
  B00100,
  B00100,
  B10101,
  B01110,
  B00100
};

byte upChar[] = {
  B00100,
  B01110,
  B10101,
  B00100,
  B00100,
  B00100,
  B00000,
  B00000
};

byte degreeChar[] = {
  B00110,
  B01001,
  B01001,
  B00110,
  B00000,
  B00000,
  B00000,
  B00000
};

//------------------------------------------------------------------------------
// Generic MeasurementSensor Class Template
//------------------------------------------------------------------------------
template <typename T>
class MeasurementSensor {
  private:
    T measurement;             // Current measurement value
    int arrow;                 // Arrow indicator: 0 = no arrow, 1 = down, 2 = up
    unsigned long arrowMillis; // Last time the arrow was updated/reset
    const long signalInterval; // Time interval to reset the arrow

  public:
    // Constructor: initializes with an initial measurement value.
    MeasurementSensor(long sigInterval, T initValue)
      : measurement(initValue), arrow(0), arrowMillis(0), signalInterval(sigInterval) {}

    // Update the measurement reading and determine the arrow indicator
    void update(T newMeasurement, unsigned long currentMillis) {
      // If the new measurement equals the previous value and the signal interval has passed, reset arrow.
      if (newMeasurement == measurement && currentMillis - arrowMillis >= signalInterval) {
        arrow = 0;
      } else {
        if (newMeasurement > measurement) {
          arrow = 2;  // Up arrow
          arrowMillis = currentMillis;
        }
        if (newMeasurement < measurement) {
          arrow = 1;  // Down arrow
          arrowMillis = currentMillis;
        }
      }
      
      // If the previous value is the initial invalid value, clear the arrow indicator.
      if (measurement == static_cast<T>(-99)) { 
        arrow = 0; 
      }
      
      measurement = newMeasurement;
    }

    // Getters for measurement and arrow
    T getMeasurement() const { return measurement; }
    int getArrow() const { return arrow; }
};

//------------------------------------------------------------------------------
// Global Instances for Temperature and Humidity
//------------------------------------------------------------------------------
MeasurementSensor<float> tempSensor(SIGNAL_INTERVAL, -99.0);
MeasurementSensor<int> humiditySensor(SIGNAL_INTERVAL, -99);

void setup() {
  Serial.begin(9600);
  dht.begin();
  delay(2000);

  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.createChar(1, downChar);
  lcd.createChar(2, upChar);
  lcd.createChar(3, degreeChar);

  pinMode(pirPin, INPUT);

  // myRTC.setYear(2025);
  // myRTC.setMonth(3);
  // myRTC.setDate(20);
  // myRTC.setHour(23);
  // myRTC.setMinute(49);
  // myRTC.setSecond(0);
}

void print2digits(int number) {
  if (number < 10) {
    lcd.print("0");
  }
  lcd.print(number, DEC);
}

void loop() {
  delay(20);

  // lcd.print(":");
  // print2digits(myRTC.getSecond());

  // Check for movement
  pirValue = digitalRead(pirPin);
  if (pirValue) {
    lcd.backlight();
  }

  // Do we need to update the display?
  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= dhtInterval) {
    previousMillis = currentMillis;

    // Update backlight based on PIR sensor
    pirValue = digitalRead(pirPin);
    if (!pirValue) {
      lcd.noBacklight();
    }

    count++;

    // Read new values from the DHT sensor
    float newTemperature = dht.readTemperature();
    int newHumidity = dht.readHumidity();

    if (isnan(newTemperature) || isnan(newHumidity)) {
      Serial.println("Failed to read from DHT sensor!");
      return;
    }

    // Update our measurement sensors
    tempSensor.update(newTemperature, currentMillis);
    humiditySensor.update(newHumidity, currentMillis);

    // Print sensor readings to the Serial Monitor
    Serial.print(count);
    Serial.print(", Temperature: ");
    Serial.print(tempSensor.getMeasurement(), 1);
    Serial.print("°C");
    Serial.print(", Humidity: ");
    Serial.print(humiditySensor.getMeasurement());
    Serial.print("%");
    Serial.println("");
    Serial.println(myRTC.getSecond(), DEC);
    Serial.println("");

    // Update the LCD display for temperature
    lcd.setCursor(0, 0);
    if (tempSensor.getArrow()) {
      lcd.write(tempSensor.getArrow());
    } else {
      lcd.print(" ");
    }
    lcd.print(tempSensor.getMeasurement(), 1); 
    lcd.write(3); // degree symbol
    lcd.print("C ");

    // Update the LCD display for humidity (set cursor on second row)
    lcd.setCursor(12, 0);
    if (humiditySensor.getArrow()) {
      lcd.write(humiditySensor.getArrow());
    } else {
      lcd.print(" ");
    }
    lcd.print(humiditySensor.getMeasurement());
    lcd.print("%");

    lcd.setCursor(1, 1);
    print2digits(myRTC.getDate());
    lcd.print("-");
    print2digits(myRTC.getMonth(century));

    lcd.setCursor(10, 1);
    print2digits(myRTC.getHour(h12Flag, pmFlag));
    lcd.print(":");
    print2digits(myRTC.getMinute());
  }
}

xxx

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