#include "LiquidCrystal_I2C.h"
#include <Wire.h>
LiquidCrystal_I2C lcd(0x27, 20, 4);
#include "DHT.h"
#define DHTPIN 4
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
const int trigPin = 9;
const int echoPin = 10;
float duration, distance;
void dht22()
{
delay(2000);
float h = dht.readHumidity();
float t = dht.readTemperature();
Serial.print("Humidity: \t" );
Serial.print(h);
Serial.print(" %\n");
lcd.setCursor(0,2);
lcd.print("Hu: ");
lcd.print(h);
delay(500);
Serial.print("Temperature: \t");
Serial.print(t);
Serial.print(" *C \n");
lcd.setCursor(11,2);
lcd.print("Te: ");
lcd.print(t);
}
void hcsr04() {
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = (duration*.0343)/2;
Serial.print("Distance: ");
Serial.println(distance);
delay(100);
lcd.setCursor(0,3);
lcd.print("Distance: ");
lcd.print(distance);
}
void setup() {
lcd.init();
lcd.backlight();
dht.begin();
Serial.begin(9600);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
}
void loop() {
delay(1000);
lcd.setCursor(0,0); //(column,Row)
lcd.print("HIMACHAL PRADESH UNI");
lcd.setCursor(0,1);
lcd.print("LOVELY PR UNIVERSITY");
dht22(); //DHT22 Sensor function call
hcsr04();
}