Humidity Monitor With DHT11 Sensor Program Codes.

Program Code:






 //TECHNICAL SCIENTIST
//www.youtube.com/c/TechnicalScientistRM

#include "DHT.h"  //Download Library
#include "U8glib.h"  //Download Library

U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE|U8G_I2C_OPT_DEV_0);

#define DHTPIN 2     // what pin we're connected to


#define DHTTYPE DHT11   // DHT 11 Sensor

DHT dht(DHTPIN, DHTTYPE, 6);

char str[10];

void drawTest(void) {
  u8g.setFont(u8g_font_unifont);
  u8g.drawStr( 0, 20, "TECHNICAL SCIENTIST");
}

void setup() {
  Serial.begin(9600);
  Serial.println("DHTxx test!");

  dht.begin();
  u8g.firstPage(); 
  do {
    drawTest();
  } while( u8g.nextPage() );
}

void loop() {
  delay(2000);
  float h = dht.readHumidity();
  // Read temperature as Celsius
  float t = dht.readTemperature();
  // Read temperature as Fahrenheit
  float f = dht.readTemperature(true);
 
  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  float hi = dht.computeHeatIndex(f, h);

  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print(" %\t");
 
  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.print(" *C ");
  Serial.print(f);
  Serial.print(" *F\t");
 
  Serial.print("Heat index: ");
  Serial.print(hi);
  Serial.println(" *F");
 
  // picture loop
  u8g.firstPage(); 
  do {
    u8g.setFont(u8g_font_helvB08);
   
    u8g.drawStr( 0, 15, "Humidity:");
    u8g.drawStr( 80, 15, dtostrf(h, 5, 2, str));
    u8g.drawStr( 120, 15, "%");
   
    u8g.drawStr( 0, 30, "Temperature:");
    u8g.drawStr( 80, 30, dtostrf(t, 5, 2, str));
    u8g.drawStr( 120, 30, "\260C");
   
    u8g.drawStr( 80, 45, dtostrf(f, 5, 2, str));
    u8g.drawStr( 120, 45, "\260F");
   
    u8g.drawStr( 0, 60, "Heat index:");
    u8g.drawStr( 80, 60, dtostrf(hi, 5, 2, str));
    u8g.drawStr( 120, 60, "\260F");
   
  } while( u8g.nextPage() );
}