// Interfacing Arduino with DHT11 humidity and temperature sensor
// include LCD library code
#include <LiquidCrystal.h>
// include DHT library code
#include "DHT.h"
#define DHTTYPE DHT11 // DHT11 sensor is used
DHT dht // Initialize DHT library
#define DHTPIN 8 // DHT11 data pin is connected to Arduino pin 8 it will act as input
#define motor_pin 9
#define led_pin 11
// LCD module connections (RS, E, D4, D5, D6, D7)
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);
char temperature[] = "Temp = 00.0 C ";
void setup() {
// set up the LCD's number of columns and rows
Serial.begin(9600)
pinMode(motor_pin, OUTPUT);
pinMode(led_pin, OUTPUT) ;
pinMode(DHTPIN , INPUT);
lcd.begin(16, 2);
dht.begin();
}
void loop()
{
delay(1000); // wait 1s between readings
//Read temperature in degree Celsius
byte Temp = dht.readTemperature;
// Check if any reads failed and exit early (to try again)
if (Temp>36 && Temp<38 )
{
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Tempreature:");
lcd.print(Temp);
lcd.setCursor(0,0);
lcd.print("Welcome");
door();
return;
}
else if(Temp<36)
{
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Tempreature:");
lcd.print(Temp);
lcd.setCursor(0,0);
lcd.print("Try Again");
return;
}
else if(Temp<38)
{
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Tempreature:");
lcd.print(Temp);
lcd.setCursor(0,0);
lcd.print("High Tempreature");
return;
}
}
void door()
{
digitalWrite(motor_pin, HIGH);
digitalWrite(led_pin, HIGH);
delay(50000); //wait second
digitalWrite(motor_pin, LOW);
digitalWrite(led_pin, LOW);
}
This is code i have written for a Arudino Uno for tempreature based door control
i have certain difficulties in the code.
Any help is welcomed.
Here is schematic for which i am trying
