solar_charger/soler_chager.ino

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

#define DHT11_PIN 7
#define photos A0
#define LED 3
#define button 2
#define buzzer 6

DHT dht(DHT11_PIN, DHT11);
volatile int buttonState;
volatile int lightValue = 0;
int count;
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup()
{
  Serial.begin(9600);
  Serial.print("setting up!\n");
  pinMode(LED, OUTPUT); //initialize digital pin LED as an output.
  pinMode(button, INPUT);
  pinMode(buzzer, OUTPUT);
  Serial.print("init lcd\n");
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.printstr("Hello, World!");
  lcd.setCursor(0,1);
  lcd.printstr("hello, Roald!");

  dht.begin(20);
  
  Serial.print("done setting up!\n");
}

void loop()// the loop function runs over and over again forever
{
  //Serial.print("[");
  //Serial.print(count);
  //Serial.print("] hey\n");

  lightValue = analogRead(photos);
  if (lightValue > 300){
    digitalWrite(LED, HIGH);
  }
  else{
    digitalWrite(LED, LOW);
  }

  float hum;
  float temp;
  temp = dht.readTemperature();
  hum = dht.readHumidity();
  {
    Serial.print("humidity: ");
    Serial.print(hum);
    Serial.print("  temperature: ");
    Serial.print(dht.convertCtoF(temp));
    Serial.print("  light: ");
    Serial.println(lightValue);
    delay(50);
  }

  //delay(100);
  
  //blink();

  buttonState = digitalRead(button);
  if(buttonState == 0) {
    digitalWrite(LED, HIGH);
    birthdaySong();
  } else {
    digitalWrite(LED, LOW);
  }
  //delay(100);
  
  //count++;
}

void birthdaySong() {
  tone(buzzer, 294);
  delay(250);
  tone(buzzer, 440);
  delay(250);
  tone(buzzer, 392);
  delay(250);
  tone(buzzer, 532);
  delay(250);
  tone(buzzer, 494);
  delay(500);
  tone(buzzer, 392);
  delay(250);
  tone(buzzer, 440);
  delay(250);
  tone(buzzer, 392);
  delay(250);
  noTone(buzzer);
  tone(buzzer, 587);
  delay(250);
  tone(buzzer, 532);
  delay(500);
  tone(buzzer, 392);
  delay(250);
  tone(buzzer, 784);
  delay(250);
  tone(buzzer, 659);
  delay(250);
  tone(buzzer, 532);
  delay(250);
  tone(buzzer, 494);
  delay(250);
  tone(buzzer, 440);
  delay(250);
  tone(buzzer, 698);
  delay(375);
  tone(buzzer, 659);
  delay(250);
  tone(buzzer, 532);
  delay(250);
  tone(buzzer, 587);
  delay(250);
  tone(buzzer, 532);
  delay(500);
  noTone(buzzer);
}

void blink()
{
  digitalWrite(LED,HIGH);  //turn the LED on (HIGH is the voltage level
  delay(1000);  //wait for a second
  digitalWrite(LED,LOW);  //turn the LED off by making the voltage LOW
  delay(1000);  //wait for a second
}