DHT22 Sensor with 16x2 LCD Screen

Monitor Temperature & Humidity of a room on LCD Screen using Arduino Mega

Mar 26, 2021

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Components and supplies

Breadboard (generic)

Jumper wires (generic)

DHT22 Temperature Sensor

RGB LCD Shield Kit, 16x2 Character Display

Arduino Mega 2560

Apps and platforms

Arduino IDE

Project description

Code

LED With DHT22 Temp. Sensor

arduino

1/* LCD Screen */
2#include <LiquidCrystal.h
3const int rs = 12, en  = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
4LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
5
6/*  Temperature humidity sensor */
7#include <DHT.h>
8#define datapin 7     // Digital  pin we're connected to
9#define DHTTYPE DHT22
10DHT dht(datapin, DHTTYPE);
11
12
13void  setup() {
14  dht.begin(); 
15  lcd.begin(16, 2);
16}
17
18void loop() {
19
20  /* Find Temperature & Humidity */
21  float air_temp = dht.readTemperature();
22  float humidity = dht.readHumidity();
23  
24  /* Print Output on LCD Screen  */
25  lcd.setCursor(0,0);
26  lcd.print(String("Temp. ") + String(air_temp));
27  lcd.setCursor(0,1);
28  lcd.print(String("Humidity ") + String(humidity));
29
30  delay(2000);
31
32}
33

/* LCD Screen */
#include <LiquidCrystal.h
const int rs = 12, en  = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

/*  Temperature humidity sensor */
#include <DHT.h>
#define datapin 7     // Digital  pin we're connected to
#define DHTTYPE DHT22
DHT dht(datapin, DHTTYPE);


void  setup() {
  dht.begin(); 
  lcd.begin(16, 2);
}

void loop() {

  /* Find Temperature & Humidity */
  float air_temp = dht.readTemperature();
  float humidity = dht.readHumidity();
  
  /* Print Output on LCD Screen  */
  lcd.setCursor(0,0);
  lcd.print(String("Temp. ") + String(air_temp));
  lcd.setCursor(0,1);
  lcd.print(String("Humidity ") + String(humidity));

  delay(2000);

}

Downloadable files

Temp Sensor With LCD and Arduino

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abshah15

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