AHT20 Temperature and Humidity

Project #15: Environment – AHT20 Temperature and Humidity – Mk35

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#DonLucElectronics #DonLuc #FlameSensor #AHT20 #FireBeetle2ESP32E #ESP32 #Display #IoT #Project #Fritzing #Programming #Electronics #Microcontrollers #Consultant

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AHT20 Temperature and Humidity

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AHT20 Temperature and Humidity

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AHT20 Temperature and Humidity

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Gravity: AHT20 Temperature and Humidity Sensor

The AHT20 is a high-precision but low-cost temperature and humidity sensor, which is equipped with an improved MEMS semiconductor capacitive humidity sensor element. It features standard I2C interface and a wide voltage supply of 2 Volt – 5 Volt, and with the simple peripheral circuit, it performs stably even in harsh environments in the measuring range of -40C ~ +85C. This sensor can be widely used for measuring the environmental temperature and humidity of home electronic equipment, the temperature and humidity of automobiles, and so on.

DL2602Mk07

1 x DFRobot FireBeetle 2 ESP32-E
1 x Fermion: 3.5” 480×320 TFT LCD Capacitive
1 x GDL Line 10 CM
1 x Gravity: AHT20 Temperature and Humidity Sensor
1 x Flame Sensor
1 x Crowtail – LED Green
1 x Gravity: IO Shield for FireBeetle 2
1 x Terminal Block Board for FireBeetle 2 ESP32-E IoT
1 x Lithium Ion Battery – 1000mAh
1 x USB 3.0 to Type-C Cable

DL2602Mk07p

DL2602Mk07p.ino

/****** Don Luc Electronics © ******
Software Version Information
Project #15: Environment - AHT20 Temperature and Humidity - Mk35
15-35
DL2602Mk07p.ino
DL2602Mk07
1 x DFRobot FireBeetle 2 ESP32-E
1 x Fermion: 3.5” 480x320 TFT LCD Capacitive
1 x GDL Line 10 CM
1 x Gravity: AHT20 Temperature and Humidity Sensor
1 x Flame Sensor
1 x Crowtail - LED Green
1 x Gravity: IO Shield for FireBeetle 2
1 x Terminal Block Board for FireBeetle 2 ESP32-E IoT
1 x Lithium Ion Battery - 1000mAh
1 x Micro USB Cable
*/

// Include the Library Code
// EEPROM Library to Read and Write EEPROM with Unique ID for Unit
#include "EEPROM.h"
// DFRobot Display GDL API
#include <DFRobot_GDL.h>
// AHT20 Humidity and Temperature Sensor
#include <DFRobot_AHT20.h>

// AHT20 Humidity and Temperature Sensor
DFRobot_AHT20 aht20;
// AHT20 Humidity and Temperature Sensor
float h = 0;
float t = 0;

// Flame Sensor
// LED Green
int iLEDG = D11;
// Flame Sensor
int iFlame =  A0;
String sF = "";

// Defined ESP32
#define TFT_DC  D2
#define TFT_CS  D6
#define TFT_RST D3

/*dc=*/ /*cs=*/ /*rst=*/
// DFRobot Display 320x480
DFRobot_ILI9488_320x480_HW_SPI screen(TFT_DC, TFT_CS, TFT_RST);

// Software Version Information
// EEPROM Unique ID Information
#define EEPROM_SIZE 64
String uid = "";

// Software Version Information
String sver = "15-35";

void loop() {
  
  // AHT20 Humidity and Temperature Sensor
  isHT();
  
  // Flame Sensor
  isFlame();

  // isDisplay HT
  isDisplayHT();

  // Delay 0.1 Second
  delay( 100 );

}

getDisplay.ino

// DFRobot Display 320x480
// DFRobot Display 320x480 - UID
void isDisplayUID(){

  // DFRobot Display 320x480
  // Text Display
  // Text Wrap
  screen.setTextWrap(false);
  // Rotation
  screen.setRotation(3);
  // Fill Screen => black
  screen.fillScreen(0x0000);
  // Text Color => white
  screen.setTextColor(0xffff);
  // Font => Free Sans Bold 12pt
  screen.setFont(&FreeSansBold12pt7b);
  // TextSize => 1.5
  screen.setTextSize(1.5);
  // Don Luc Electronics
  screen.setCursor(0, 30);
  screen.println("Don Luc Electronics");
  // Tilt Switch
  screen.setCursor(0, 60);
  screen.println("Humidity and Temperature");
  // Version
  screen.setCursor(0, 90);
  screen.println("Version");
  screen.setCursor(0, 120);
  screen.println( sver );
  // EEPROM
  screen.setCursor(0, 150);
  screen.println("EEPROM");
  screen.setCursor(0, 180);
  screen.println( uid );

}
// isDisplay HT
void isDisplayHT(){

  // DFRobot Display 320x480
  // Text Display
  // Text Wrap
  screen.setTextWrap(false);
  // Rotation
  screen.setRotation(3);
  // Fill Screen => white
  screen.fillScreen(0xffff);
  // Text Color => blue
  screen.setTextColor(0x001F);
  // Font => Free Sans Bold 12pt
  screen.setFont(&FreeSansBold12pt7b);
  // TextSize => 1.5
  screen.setTextSize(1.5);
  // Tilt Switch
  screen.setCursor(0, 30);
  screen.println("Humidity and Temperature");
  screen.setCursor(0, 70);
  screen.println( sF );
  screen.setCursor(0, 120);
  screen.println("Humidity");
  screen.setCursor(0, 150);
  screen.print( h );
  screen.setCursor(65, 150);
  screen.println( "%RH" );
  screen.setCursor(0, 200);
  screen.println("Temperature");
  screen.setCursor(0, 230);
  screen.print( t );
  screen.setCursor(65, 230);
  screen.println( "C" );

}

getEEPROM.ino

// isUID EEPROM Unique ID
void isUID()
{
  
  // Is Unit ID
  uid = "";
  for (int x = 0; x < 7; x++)
  {
    uid = uid + char(EEPROM.read(x));
  }
  
}

getFlame.ino

// Flame Sensor
// is Tilt
void isFlame(){

  // Flame
  // Check if Flame Sensor
  if(digitalRead( iFlame) == 0 ){   
    
    // Turn LED HIGH
    digitalWrite(iLEDG, HIGH);
    sF = "Fire Detected!!!";

  } 
  else {
    
    // Turn LED LOW
    digitalWrite(iLEDG, LOW);
    sF = "No Fire Detected!!!";
    
  }

}

getHT.ino

// AHT20 Humidity and Temperature Sensor
void isHT(){

  if(aht20.startMeasurementReady(true)){

    // Humidity
    h = aht20.getHumidity_RH();
  
   // Temperature
   t = aht20.getTemperature_C();
   }
  
}

setup.ino

// Setup
void setup()
{
 
  // Delay
  delay( 100 );

   // EEPROM Size
  EEPROM.begin(EEPROM_SIZE);
  
  // EEPROM Unique ID
  isUID();

  // Delay
  delay( 100 );
 
  // DFRobot Display 320x480
  screen.begin();

  // Delay
  delay( 100 );
  
  // Flame Sensor
  // LED Green 
  pinMode(iLEDG, OUTPUT);
  // Flame Sensor
  pinMode(iFlame, INPUT);

  // Delay
  delay( 100 );

  // AHT20 Humidity and Temperature Sensor
  aht20.begin();
  
  // Delay
  delay( 100 );

  // DFRobot Display 320x480 - UID
  // Don Luc Electronics
  // Version
  // EEPROM
  isDisplayUID();

  // Delay 5 Second
  delay( 5000 );

}

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