// ---------------------------------------------------------------------------
// Program obslugujacy buzzer.
// ---------------------------------------------------------------------------

#include <Arduino.h>

#define BUZZER_PIN A1
#define SW1_PIN 4

void setup()
{
    pinMode(SW1_PIN, INPUT);
}

void loop()
{
    if (digitalRead(SW1_PIN) == LOW)
    {
        delay(200);
        tone(BUZZER_PIN, 1000);
        delay(200);
        tone(BUZZER_PIN, 500);
        delay(200);
        tone(BUZZER_PIN, 750);
        delay(200);
        noTone(BUZZER_PIN);
    }
}


// ---------------------------------------------------------------------------
// Program obslugujacy fotorezystor.
// ---------------------------------------------------------------------------

#include <Arduino.h>

#define PHR_PIN A0
int value = 0;

void setup()
{
    Serial.begin(9600);
}

void loop()
{
    value = analogRead(PHR_PIN);
    Serial.println(value);
    delay(250);
}


// ---------------------------------------------------------------------------
// Program obslugujacy ultradzwiekowy czujnik odleglosci HC-SR04.
// ---------------------------------------------------------------------------

#include <Arduino.h>

#define TRIG_PIN 8
#define ECHO_PIN 9

long duration;
int distance;

void setup()
{
    pinMode(TRIG_PIN, OUTPUT);
    pinMode(ECHO_PIN, INPUT);
    Serial.begin(9600);
}

void loop()
{
    digitalWrite(TRIG_PIN, LOW);
    delayMicroseconds(2);
    digitalWrite(TRIG_PIN, HIGH);
    delayMicroseconds(10);
    digitalWrite(TRIG_PIN, LOW);
    duration = pulseIn(ECHO_PIN, HIGH);
    distance = duration * 0.034 / 2;
    Serial.print("Odlegosc: ");
    Serial.print(distance);
    Serial.println(" cm");
    delay(250);
}


// ---------------------------------------------------------------------------
// Program obslugujacy czujnik natezenia swiatla BH1750.
// ---------------------------------------------------------------------------

#include <Arduino.h>
#include <BH1750.h>
#include <Wire.h>

BH1750 LightMeter(0x23);
void setup()
{
    Serial.begin(9600);
    Wire.begin();
    LightMeter.begin();
}

void loop()
{
    float lux = LightMeter.readLightLevel();
    Serial.print("Natezenie swiatla: ");
    Serial.print(lux);
    Serial.println(" lx");
    delay(250);
}