Two Temperatures and Humidity to Both Terminal and LCD

1inary file (no preview

1inary file (no preview

1inary file (no preview

1inary file (no preview

1// Measurement with the DH11 and thermistor
2//Printout to terminal  and to the LCD display
3
4#include <dht_nonblocking.h> // DH11
5#define DHT_SENSOR_TYPE  DHT_TYPE_11 // DH11
6#include <LiquidCrystal.h> // LCD display
7
8static const  int DHT_SENSOR_PIN = 2; //DH11
9DHT_nonblocking dht_sensor( DHT_SENSOR_PIN, DHT_SENSOR_TYPE  ); //DH11
10
11int tempPin = 0; // Thermistor
12
13//                BS E D4  D5  D6  D7
14LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
15
16// setup
17void  setup()
18{
19  Serial.begin(9600);
20  
21  lcd.begin(16, 2);
22}
23
24static  bool measure_environment( float *temperature, float *humidity ) // DH11
25{
26  static unsigned long measurement_timestamp = millis( );
27
28  /* Measure once  every x seconds. */
29  if( millis( ) - measurement_timestamp > 10000ul )
30  {
31    if( dht_sensor.measure( temperature, humidity ) == true )
32    {
33      measurement_timestamp  = millis( );
34      return( true );
35    }
36  }
37
38  return( false );
39}
40
41void  loop()
42{
43  // Thermistor
44    int tempReading = analogRead(tempPin);
45    double tempK = log(10000.0 * ((1024.0 / tempReading - 1)));
46    tempK = 1  / (0.001129148 + (0.000234125 + (0.0000000876741 * tempK * tempK )) * tempK ); //  Temp Kelvin
47    float tempC = tempK - 273.15;            // Convert Kelvin to  Celcius
48    float tempF = (tempC * 9.0)/ 5.0 + 32.0; // Convert Celcius to Fahrenheit
49    
50  // DH11
51    float temperature;
52    float humidity;
53    if( measure_environment(  &temperature, &humidity ) == true )
54    
55    {
56  // Print a terminal
57    Serial.print( "DH11 " );
58    Serial.print( temperature, 1 );
59    Serial.print("  C, " );
60    Serial.print( humidity, 1 );
61    Serial.print(" %; Therm ");
62    Serial.print(tempC);
63    Serial.print(" C, ");
64    Serial.print(tempF);
65    Serial.print(" F\
66");
67    
68
69  // Display in the LCD
70    // Display  Temperature from the Thermistor
71    lcd.setCursor(0, 0);
72    lcd.print("Therm        C  ");
73    lcd.setCursor(7, 0);
74    lcd.print(tempC);
75
76    //  Display Temperature from the DH11
77    lcd.setCursor(0, 2);
78    lcd.print("DH11     C     %");
79    lcd.setCursor(5, 2);
80    lcd.print(temperature,1);
81
82    // Display Humidity from the DH11
83    lcd.setCursor(11, 2);
84    lcd.print(humidity,1);
85    
86    delay(500);
87    }
88}
89// This is the end.