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#DonLucElectronics #DonLuc #CO #AHT20 #Environment #FireBeetle2ESP32E #ESP32 #Display #IoT #Project #Fritzing #Programming #Electronics #Microcontrollers #Consultant
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Gravity: Analog CO Sensor (MQ7)
This is an Arduino Carbon Monoxide Sensor. It uses MQ7 probe to detect Carbon Monoxide (CO) concentrations in the air from 20 to 2000ppm. The sensitivity can be adjusted by the potentiometer. The output is proportional to the density of gas. You can use analog reading to read the data from this sensor.
DL2605Mk02
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: Analog CO Sensor (MQ7)
1 x Gravity: AHT20 Temperature and Humidity Sensor
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
DL2605Mk02p
DL2605Mk02p.ino
/****** Don Luc Electronics © ******
Software Version Information
Project #15: Environment - Carbon Monoxide Sensor MQ7 - Mk39
15-39
DL2605Mk02p.ino
DL2605Mk02
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: Analog CO Sensor (MQ7)
1 x Gravity: AHT20 Temperature and Humidity Sensor
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
*/
// 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>
// MQ7 Carbon Monoxide
int iMQ7 = A0;
int iValMQ7 = 0;
// AHT20 Humidity and Temperature Sensor
DFRobot_AHT20 aht20;
// AHT20 Humidity and Temperature Sensor
float h = 0;
float t = 0;
// 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 = "15-39";
void loop() {
// isMQ7
isMQ7();
// AHT20 Humidity and Temperature Sensor
isHT();
// isDisplay CO
isDisplayCO();
// Delay 1 Second
delay( 1000 );
}
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("Carbon Monoxide");
// 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 CO
void isDisplayCO(){
// 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);
// Vibration Senso
screen.setCursor(0, 30);
screen.println("Carbon Monoxide");
// Humidity
screen.setCursor(0, 70);
screen.println("Humidity");
screen.setCursor(0, 100);
screen.print( h );
screen.setCursor(65, 100);
screen.println( "%RH" );
// Temperature
screen.setCursor(0, 140);
screen.println("Temperature");
screen.setCursor(0, 170);
screen.print( t );
screen.setCursor(65, 170);
screen.println( "C" );
// MQ7 Carbon Monoxide
screen.setCursor(0, 210);
screen.println("MQ7 Carbon Monoxide");
screen.setCursor(0, 240);
screen.print( iValMQ7 );
screen.setCursor(65, 240);
screen.println( "ppm" );
}
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));
}
}
getgetHT.ino
// AHT20 Humidity and Temperature Sensor
void isHT(){
if(aht20.startMeasurementReady(true)){
// Humidity
h = aht20.getHumidity_RH();
// Temperature
t = aht20.getTemperature_C();
}
}
getMQ7.ino
// MQ7 Carbon Monoxide
// isMQ7
void isMQ7(){
iValMQ7 = analogRead( iMQ7 );
}
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 );
// 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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