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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Devices & Components

Arduino Mega 2560 Rev3

Breadboard (generic)

Jumper wires (generic)

DHT22 Temperature Sensor

RGB LCD Shield Kit, 16x2 Character Display

Software & Tools

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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