Temperature and Humidity Sensor

Easy to build temperature and humidity sensor with a cheap 2x16 LCD.

Apr 21, 2018

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weather

environmental sensing

Devices & Components

Arduino Leonardo with Headers

Resistor 10k ohm

DHT11 Temperature & Humidity Sensor (4 pins)

Rotary potentiometer (generic)

Standard LCD - 16x2 White on Blue

Project description

Code

DHT11 temperature and humidity sesnor with LCD on Arduino Leonardo

arduino

Easy temperature and humidity sensor on DHT11 with LCD

1// DHT11 sensor
2
3#include <DHT.h>
4#define DHTPIN 7 // what digital
5  pin we're connected to
6#define DHTTYPE DHT11  //DHT 11
7
8// LCD display
9
10#include
11  <LiquidCrystal.h>;
12LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
13
14DHT dht (DHTPIN,
15  DHTTYPE); //Initialize DHT sensor.
16
17
18void setup() {
19  // put your setup
20  code here, to run once:
21
22
23// Serial.begin(9600);
24dht.begin();
25
26}
27
28void
29  loop() {
30 delay(10000); // Waiting time between measurements
31 
32float t
33  = dht.readTemperature(); // Read temperature in *C (default)
34float h = dht.readHumidity();
35  // Read humidity %
36
37float hic = dht.computeHeatIndex(t, h);
38
39
40/*Serial.print("Temerature:
41  ");
42Serial.print(t);
43Serial.print("*C\	");
44Serial.print("Humidity:
45  ");
46Serial.print(h);
47Serial.print("%\	");
48Serial.print("Heat index:
49  ");
50Serial.println(hic);
51*/
52
53
54
55// LCD display
56
57lcd.begin(16,
58  2); // display diamensions
59lcd.setCursor(0,0);
60lcd.print("T=");
61lcd.setCursor(2,0);
62lcd.print(t);
63lcd.setCursor(4,0);
64lcd.print("*C
65  ");
66lcd.setCursor(0,1);
67lcd.print("H=");
68lcd.setCursor(2,1);
69lcd.print(h);
70lcd.setCursor(4,1);
71lcd.print("%
72  ");
73lcd.setCursor(8,1);
74lcd.print("HI=");
75lcd.print(hic);
76
77}
78

// DHT11 sensor

#include <DHT.h>
#define DHTPIN 7 // what digital
  pin we're connected to
#define DHTTYPE DHT11  //DHT 11

// LCD display

#include
  <LiquidCrystal.h>;
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

DHT dht (DHTPIN,
  DHTTYPE); //Initialize DHT sensor.


void setup() {
  // put your setup
  code here, to run once:


// Serial.begin(9600);
dht.begin();

}

void
  loop() {
 delay(10000); // Waiting time between measurements
 
float t
  = dht.readTemperature(); // Read temperature in *C (default)
float h = dht.readHumidity();
  // Read humidity %

float hic = dht.computeHeatIndex(t, h);


/*Serial.print("Temerature:
  ");
Serial.print(t);
Serial.print("*C\	");
Serial.print("Humidity:
  ");
Serial.print(h);
Serial.print("%\	");
Serial.print("Heat index:
  ");
Serial.println(hic);
*/



// LCD display

lcd.begin(16,
  2); // display diamensions
lcd.setCursor(0,0);
lcd.print("T=");
lcd.setCursor(2,0);
lcd.print(t);
lcd.setCursor(4,0);
lcd.print("*C
  ");
lcd.setCursor(0,1);
lcd.print("H=");
lcd.setCursor(2,1);
lcd.print(h);
lcd.setCursor(4,1);
lcd.print("%
  ");
lcd.setCursor(8,1);
lcd.print("HI=");
lcd.print(hic);

}

Downloadable files

DHT11 temperature and humidity sesnor with LCD on Arduino Leonardo

Simple temperature and humidity sensor with LCD

DHT11 temperature and humidity sesnor with LCD on Arduino Leonardo

Simple temperature and humidity sensor with LCD

DHT11 temperature and humidity sesnor with LCD on Arduino Leonardo

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