DHT11 Humidity + Temperature Sensor with 16x2 LCD display

1//We'll start by adding our libraries
2
3#include <LiquidCrystal.h>
4
5#include  <SimpleDHT.h>
6
7//Declaring digital pin no 6 as the dht11 data pin
8
9int  pinDHT11 = 6;
10SimpleDHT11 dht11;
11
12//Declaring the lcd pins
13
14const  int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
15LiquidCrystal lcd(rs, en,  d4, d5, d6, d7);
16
17void setup() {
18// Don't forget to choose 9600 at the  port screen
19  
20  Serial.begin(9600);
21 
22//Telling our lcd to start up
23  
24  lcd.begin(16, 2);
25   
26   
27}
28
29void loop() {
30
31  //These  serial codes are for getting readings on the port screen aswell as the LCD display,  since they'll offer us a more detailed interface
32  
33  
34  Serial.println("=================================");
35  Serial.println("DHT11 readings...");
36  
37 
38  byte temperature = 0;
39  byte humidity = 0;
40  int err = SimpleDHTErrSuccess;
41
42  //This bit will  tell our Arduino what to do if there is some sort of an error at getting readings  from our sensor
43  if ((err = dht11.read(pinDHT11, &temperature, &humidity, NULL))  != SimpleDHTErrSuccess) {
44    Serial.print("No reading , err="); Serial.println(err);delay(1000);
45    return;
46  }
47  
48  Serial.print("Readings: ");
49  Serial.print((int)temperature);  Serial.print(" Celcius, ");
50  Serial.print((int)humidity); Serial.println("  %");
51 
52  //Telling our lcd to refresh itself every 0.75 seconds
53  lcd.clear();
54  
55  //Choosing the first line and row
56  lcd.setCursor(0,0);
57  //Typing Temp:  to the first line starting from the first row
58  lcd.print("Temp: ");
59  //Typing  the temperature readings after "Temp: " 
60  lcd.print((int)temperature);
61  //Choosing the second line and first row
62  lcd.setCursor(0,1);
63  //Typing  Humidity(%): to the second line starting from the first row
64  lcd.print("Humidity(%):  ");
65  //Typing the humidity readings after "Humidity(%): "
66  lcd.print((int)humidity);
67  
68  
69  
70  
71  delay(750);
72}
73

1//We'll start by adding our libraries
2
3#include <LiquidCrystal.h>
4
5#include   <SimpleDHT.h>
6
7//Declaring digital pin no 6 as the dht11 data pin
8
9int   pinDHT11 = 6;
10SimpleDHT11 dht11;
11
12//Declaring the lcd pins
13
14const   int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
15LiquidCrystal lcd(rs, en,   d4, d5, d6, d7);
16
17void setup() {
18// Don't forget to choose 9600 at the   port screen
19  
20  Serial.begin(9600);
21 
22//Telling our lcd to start up
23   
24  lcd.begin(16, 2);
25   
26   
27}
28
29void loop() {
30
31  //These   serial codes are for getting readings on the port screen aswell as the LCD display,   since they'll offer us a more detailed interface
32  
33  
34  Serial.println("=================================");
35   Serial.println("DHT11 readings...");
36  
37 
38  byte temperature = 0;
39   byte humidity = 0;
40  int err = SimpleDHTErrSuccess;
41
42  //This bit will   tell our Arduino what to do if there is some sort of an error at getting readings   from our sensor
43  if ((err = dht11.read(pinDHT11, &temperature, &humidity, NULL))   != SimpleDHTErrSuccess) {
44    Serial.print("No reading , err="); Serial.println(err);delay(1000);
45     return;
46  }
47  
48  Serial.print("Readings: ");
49  Serial.print((int)temperature);   Serial.print(" Celcius, ");
50  Serial.print((int)humidity); Serial.println("   %");
51 
52  //Telling our lcd to refresh itself every 0.75 seconds
53  lcd.clear();
54   
55  //Choosing the first line and row
56  lcd.setCursor(0,0);
57  //Typing Temp:   to the first line starting from the first row
58  lcd.print("Temp: ");
59  //Typing   the temperature readings after "Temp: " 
60  lcd.print((int)temperature);
61   //Choosing the second line and first row
62  lcd.setCursor(0,1);
63  //Typing   Humidity(%): to the second line starting from the first row
64  lcd.print("Humidity(%):   ");
65  //Typing the humidity readings after "Humidity(%): "
66  lcd.print((int)humidity);
67   
68  
69  
70  
71  delay(750);
72}
73

1//We'll start by adding our libraries
2
3#include <LiquidCrystal.h>
4
5#include   <SimpleDHT.h>
6
7//Declaring digital pin no 6 as the dht11 data pin
8
9int   pinDHT11 = 6;
10SimpleDHT11 dht11;
11
12//Declaring the lcd pins
13
14const   int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
15LiquidCrystal lcd(rs, en,   d4, d5, d6, d7);
16
17void setup() {
18// Don't forget to choose 9600 at the   port screen
19  
20  Serial.begin(9600);
21 
22//Telling our lcd to start up
23   
24  lcd.begin(16, 2);
25   
26   
27}
28
29void loop() {
30
31  //These   serial codes are for getting readings on the port screen aswell as the LCD display,   since they'll offer us a more detailed interface
32  
33  
34  Serial.println("=================================");
35   Serial.println("DHT11 readings...");
36  
37 
38  byte temperature = 0;
39   byte humidity = 0;
40  int err = SimpleDHTErrSuccess;
41
42  //This bit will   tell our Arduino what to do if there is some sort of an error at getting readings   from our sensor
43  if ((err = dht11.read(pinDHT11, &temperature, &humidity, NULL))   != SimpleDHTErrSuccess) {
44    Serial.print("No reading , err="); Serial.println(err);delay(1000);
45     return;
46  }
47  
48  Serial.print("Readings: ");
49  Serial.print((int)temperature);   Serial.print(" Celcius, ");
50  Serial.print((int)humidity); Serial.println("   %");
51 
52  //Telling our lcd to refresh itself every 0.75 seconds
53  lcd.clear();
54   
55  //Choosing the first line and row
56  lcd.setCursor(0,0);
57  //Typing Temp:   to the first line starting from the first row
58  lcd.print("Temp: ");
59  //Typing   the temperature readings after "Temp: " 
60  lcd.print((int)temperature);
61   //Choosing the second line and first row
62  lcd.setCursor(0,1);
63  //Typing   Humidity(%): to the second line starting from the first row
64  lcd.print("Humidity(%):   ");
65  //Typing the humidity readings after "Humidity(%): "
66  lcd.print((int)humidity);
67   
68  
69  
70  
71  delay(750);
72}
73

1//We'll start by adding our libraries
2
3#include <LiquidCrystal.h>
4
5#include
6  <SimpleDHT.h>
7
8//Declaring digital pin no 6 as the dht11 data pin
9
10int
11  pinDHT11 = 6;
12SimpleDHT11 dht11;
13
14//Declaring the lcd pins
15
16const
17  int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
18LiquidCrystal lcd(rs, en,
19  d4, d5, d6, d7);
20
21void setup() {
22// Don't forget to choose 9600 at the
23  port screen
24  
25  Serial.begin(9600);
26 
27//Telling our lcd to start up
28
29  
30  lcd.begin(16, 2);
31   
32   
33}
34
35void loop() {
36
37  //These
38  serial codes are for getting readings on the port screen aswell as the LCD display,
39  since they'll offer us a more detailed interface
40  
41  
42  Serial.println("=================================");
43
44  Serial.println("DHT11 readings...");
45  
46 
47  byte temperature = 0;
48
49  byte humidity = 0;
50  int err = SimpleDHTErrSuccess;
51
52  //This bit will
53  tell our Arduino what to do if there is some sort of an error at getting readings
54  from our sensor
55  if ((err = dht11.read(pinDHT11, &temperature, &humidity, NULL))
56  != SimpleDHTErrSuccess) {
57    Serial.print("No reading , err="); Serial.println(err);delay(1000);
58
59    return;
60  }
61  
62  Serial.print("Readings: ");
63  Serial.print((int)temperature);
64  Serial.print(" Celcius, ");
65  Serial.print((int)humidity); Serial.println("
66  %");
67 
68  //Telling our lcd to refresh itself every 0.75 seconds
69  lcd.clear();
70
71  
72  //Choosing the first line and row
73  lcd.setCursor(0,0);
74  //Typing Temp:
75  to the first line starting from the first row
76  lcd.print("Temp: ");
77  //Typing
78  the temperature readings after "Temp: " 
79  lcd.print((int)temperature);
80
81  //Choosing the second line and first row
82  lcd.setCursor(0,1);
83  //Typing
84  Humidity(%): to the second line starting from the first row
85  lcd.print("Humidity(%):
86  ");
87  //Typing the humidity readings after "Humidity(%): "
88  lcd.print((int)humidity);
89
90  
91  
92  
93  
94  delay(750);
95}
96