Portable DHT11 Temperature and Humidity Sensor

The sensor displays the temperature onto the LCD.

Aug 10, 2020

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3 respects

weather

environmental sensing

data collection

Components and supplies

DHT11 Temperature & Humidity Sensor (4 pins)

Arduino Nano R3

Alphanumeric LCD, 16 x 2

Power Supply Module

Tools and machines

Jumper Wire Kit, Multicolor

Apps and platforms

Arduino IDE

Project description

Code

ryan_nano_lcd_temperature_sensor.ino

c_cpp

1
2
3#include "DHT.h"
4#define Type DHT11
5#include <LiquidCrystal.h>
6int   rs=7;
7int en=8;
8int d4=9;
9int d5=10;
10int d6=11;
11int d7=12;
12LiquidCrystal   lcd(rs,en,d4,d5,d6,d7);
13 
14int sensePin=2;
15DHT HT(sensePin,Type);
16float   humidity;
17float tempC;
18float tempF;
19int setTime=500;
20int dt=1000;
21   
22void setup() {
23  // put your setup code here, to run once:
24Serial.begin(9600);
25HT.begin();
26delay(setTime);
27lcd.begin(16,2);
28   
29}
30 
31void loop() {
32humidity=HT.readHumidity();
33tempC=HT.readTemperature();
34tempF=HT.readTemperature(true);
35   
36lcd.setCursor(0,0);
37lcd.print("Temp F= ");
38lcd.print(tempF);
39lcd.setCursor(0,1);
40lcd.print("Humidity=   ");
41lcd.print(humidity);
42lcd.print(" %");
43delay(500);
44lcd.clear();
45   
46Serial.print("Humidity: ");
47Serial.print(humidity);
48Serial.print("%   Temperature ");
49Serial.print(tempC);
50Serial.print(" C ");
51Serial.print(tempF);
52Serial.println("   F ");
53}
54


#include "DHT.h"
#define Type DHT11
#include <LiquidCrystal.h>
int   rs=7;
int en=8;
int d4=9;
int d5=10;
int d6=11;
int d7=12;
LiquidCrystal   lcd(rs,en,d4,d5,d6,d7);
 
int sensePin=2;
DHT HT(sensePin,Type);
float   humidity;
float tempC;
float tempF;
int setTime=500;
int dt=1000;
   
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
HT.begin();
delay(setTime);
lcd.begin(16,2);
   
}
 
void loop() {
humidity=HT.readHumidity();
tempC=HT.readTemperature();
tempF=HT.readTemperature(true);
   
lcd.setCursor(0,0);
lcd.print("Temp F= ");
lcd.print(tempF);
lcd.setCursor(0,1);
lcd.print("Humidity=   ");
lcd.print(humidity);
lcd.print(" %");
delay(500);
lcd.clear();
   
Serial.print("Humidity: ");
Serial.print(humidity);
Serial.print("%   Temperature ");
Serial.print(tempC);
Serial.print(" C ");
Serial.print(tempF);
Serial.println("   F ");
}

ryan_nano_lcd_temperature_sensor.ino

c_cpp

1
2
3#include "DHT.h"
4#define Type DHT11
5#include <LiquidCrystal.h>
6int  rs=7;
7int en=8;
8int d4=9;
9int d5=10;
10int d6=11;
11int d7=12;
12LiquidCrystal  lcd(rs,en,d4,d5,d6,d7);
13 
14int sensePin=2;
15DHT HT(sensePin,Type);
16float  humidity;
17float tempC;
18float tempF;
19int setTime=500;
20int dt=1000;
21  
22void setup() {
23  // put your setup code here, to run once:
24Serial.begin(9600);
25HT.begin();
26delay(setTime);
27lcd.begin(16,2);
28  
29}
30 
31void loop() {
32humidity=HT.readHumidity();
33tempC=HT.readTemperature();
34tempF=HT.readTemperature(true);
35  
36lcd.setCursor(0,0);
37lcd.print("Temp F= ");
38lcd.print(tempF);
39lcd.setCursor(0,1);
40lcd.print("Humidity=  ");
41lcd.print(humidity);
42lcd.print(" %");
43delay(500);
44lcd.clear();
45  
46Serial.print("Humidity: ");
47Serial.print(humidity);
48Serial.print("%  Temperature ");
49Serial.print(tempC);
50Serial.print(" C ");
51Serial.print(tempF);
52Serial.println("  F ");
53}
54


#include "DHT.h"
#define Type DHT11
#include <LiquidCrystal.h>
int  rs=7;
int en=8;
int d4=9;
int d5=10;
int d6=11;
int d7=12;
LiquidCrystal  lcd(rs,en,d4,d5,d6,d7);
 
int sensePin=2;
DHT HT(sensePin,Type);
float  humidity;
float tempC;
float tempF;
int setTime=500;
int dt=1000;
  
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
HT.begin();
delay(setTime);
lcd.begin(16,2);
  
}
 
void loop() {
humidity=HT.readHumidity();
tempC=HT.readTemperature();
tempF=HT.readTemperature(true);
  
lcd.setCursor(0,0);
lcd.print("Temp F= ");
lcd.print(tempF);
lcd.setCursor(0,1);
lcd.print("Humidity=  ");
lcd.print(humidity);
lcd.print(" %");
delay(500);
lcd.clear();
  
Serial.print("Humidity: ");
Serial.print(humidity);
Serial.print("%  Temperature ");
Serial.print(tempC);
Serial.print(" C ");
Serial.print(tempF);
Serial.println("  F ");
}

Downloadable files

DHT11 Schematic

LCD Schematic

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