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Project #29 - DFRobot - MEMS CH4 - Mk25

Fermion: MEMS Methane CH4 Gas Detection Sensor

IntermediateFull instructions provided1 hour51
Project #29 - DFRobot - MEMS CH4 - Mk25

Things used in this project

Hardware components

DFRobot FireBeetle 2 ESP32-C6
×1
DFRobot Fermion: MEMS Methane CH4 Gas Detection Sensor
×1
DFRobot Fermion: MEMS VOC Gas Detection Sensor
×1
DFRobot Fermion: SHTC3 Temperature and Humidity Sensor
×1
DFRobot Fermion: 2.0" 320x240 IPS TFT LCD
×1
SparkFun MicroSD 1 GB
×1
DFRobot GDL Line 10 CM
×1
SparkFun Lithium Ion Battery - 1000mAh
×1
SparkFun USB-A to USB-C Cable - 1m
×1

Software apps and online services

Arduino IDE
Arduino IDE

Story

Read more

Schematics

FireBeetle 2 ESP32-C6

Code

DL2408Mk02p.ino

Arduino
/****** Don Luc Electronics © ******
Software Version Information
Project #29 - DFRobot - MEMS CH4 - Mk25
29-25
DL2408Mk02p.ino
DL2408Mk02
1 x FireBeetle 2 ESP32-C6
1 x Fermion: MEMS Methane CH4 Gas Detection Sensor
1 x Fermion: MEMS VOC Gas Detection Sensor
1 x Fermion: SHTC3 Temperature and Humidity Sensor
1 x Fermion: 2.0" 320x240 IPS TFT LCD
1 x MicroSD 2 GB
1 x GDL Line 10 CM
1 x 1 x Lithium Ion Battery - 1000mAh
1 x USB 3.1 Cable A to C
*/

// 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>
// Arduino
#include <Arduino.h>
// Wire
#include <Wire.h>
// SHTC3 Temperature and Humidity Sensor
#include "SHTSensor.h"
// SD Card
#include "FS.h"
#include "SD.h"
#include "SPI.h"

// MEMS CH4 Gas
int iSensorCH4 = 3;
int iSensorValueCH4 = 0;
int y = 0;

// MEMS VOC Gas
int iSensorVOC = 2;
int iSensorValueVOC = 0;
int x = 0;

// MicroSD Card
const int chipSelect = 18;
String zzzzzz = "";

// SHTC3 Temperature and Humidity Sensor
SHTSensor sht;
// Temperature
float T;
// Humidity
float H;

// Defined ESP32
#define TFT_DC 8
#define TFT_CS 1
#define TFT_RST 14

/*dc=*/ /*cs=*/ /*rst=*/
// DFRobot Display 240x320
DFRobot_ST7789_240x320_HW_SPI screen(TFT_DC, TFT_CS, TFT_RST);

// LED Green
int iLEDGreen = 15;

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

// Software Version Information
String sver = "29-25";

void loop() {

  // MEMS CH4 Gas
  isCH4();
  
  // MEMS VOC Gas
  isVOC();
  
  // SHTC3 Temperature and Humidity Sensor
  isSHTC3();

  // DFRobot Display 240x320 - Temperature and Humidity, VOC, CH4
  isDisplayTH();

  // MicroSD Card
  isSD();

  // Delay 5 Second
  delay( 5000 );

}

getCH4.ino

Arduino
// MEMS CH4 Gas
// is CH4
void isCH4(){

  // MEMS CH4 Gas
  y = analogRead( iSensorCH4 );
  iSensorValueCH4 = map(y, 1, 4095, 1, 10000);
  
}

getDisplay.ino

Arduino
// DFRobot Display 240x320
// DFRobot Display 240x320 - UID
void isDisplayUID() {

    // DFRobot Display 240x320
    // 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 Mono 9pt
    screen.setFont(&FreeMono9pt7b);
    // TextSize => 1.5
    screen.setTextSize(1.5);
    // DFRobot Display
    screen.setCursor(0, 30);
    screen.println("DFRobot Display");
    // Don Luc Electronics
    screen.setCursor(0, 60);
    screen.println("Don Luc Electronics");
    // 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 );

}
// DFRobot Display 240x320 - Temperature and Humidity, VOC, CH4
void isDisplayTH() {
  
    // DFRobot Display 240x320
    // 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 Mono 9pt
    screen.setFont(&FreeMono9pt7b);
    // TextSize => 1.5
    screen.setTextSize(1.5);
    // Don Luc Electronics
    screen.setCursor(0, 30);
    screen.println("Don Luc Electronics");
    // Version
    screen.setCursor(0, 60);
    screen.println( sver );
    // Temperature
    screen.setCursor(0, 90);
    screen.println( "Temp: " );
    screen.setCursor(60, 90);
    screen.println( T );
    screen.setCursor(130, 90);
    screen.println("Celsius");
    // Humidity
    screen.setCursor(0, 120);
    screen.println("Humi: ");
    screen.setCursor(60, 120);
    screen.println( H );
    screen.setCursor(130, 120);
    screen.println("% RH");
    // MEMS VOC Gas
    screen.setCursor(0, 150);
    screen.println( "VOC: " );
    screen.setCursor(60, 150);
    screen.println( iSensorValueVOC );
    screen.setCursor(130, 150);
    screen.println("ppm");
    // MEMS CH4 Gas
    screen.setCursor(0, 180);
    screen.println( "CH4: " );
    screen.setCursor(60, 180);
    screen.println( iSensorValueCH4 );
    screen.setCursor(130, 180);
    screen.println("ppm");

}

getEEPROM.ino

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

getSD.ino

Arduino
// MicroSD Card
// MicroSD Setup
void isSetupSD() {

    // MicroSD Card
    pinMode( chipSelect , OUTPUT );
    if(!SD.begin( chipSelect )){
        ;  
        return;
    }
    
    uint8_t cardType = SD.cardType();

    // CARD NONE
    if(cardType == CARD_NONE){
        ; 
        return;
    }

    // SD Card Type
    if(cardType == CARD_MMC){
        ; 
    } else if(cardType == CARD_SD){
        ; 
    } else if(cardType == CARD_SDHC){
        ; 
    } else {
        ; 
    } 

    // Size
    uint64_t cardSize = SD.cardSize() / (1024 * 1024);
 
}
// MicroSD Card
void isSD() {

  zzzzzz = "";

  //DFR|EEPROM Unique ID|Version|
  //Temperature C|% RH|VOC|CH4|*\r
  zzzzzz = "DFR|" + uid + "|" + sver + "|"
  + String( T ) + "|" + String( H ) + "|"
  + String( iSensorValueVOC ) + "|" + String( iSensorValueCH4 ) + "|*\r";

  // msg + 1
  char msg[zzzzzz.length() + 1];

  zzzzzz.toCharArray(msg, zzzzzz.length() + 1);

  // Append File
  appendFile(SD, "/dfrdata.txt", msg );
  
}
// List Dir
void listDir(fs::FS &fs, const char * dirname, uint8_t levels){
    
    // List Dir
    dirname;
    
    File root = fs.open(dirname);
    
    if(!root){
        return;
    }
    
    if(!root.isDirectory()){
        return;
    }

    File file = root.openNextFile();
    
    while(file){
        if(file.isDirectory()){
            file.name();
            if(levels){
                listDir(fs, file.name(), levels -1);
            }
        } else {
            file.name();
            file.size();
        }
        file = root.openNextFile();
    }
    
}
// Write File
void writeFile(fs::FS &fs, const char * path, const char * message){
    
    // Write File
    path;
    
    File file = fs.open(path, FILE_WRITE);
    
    if(!file){
        return;
    }
    
    if(file.print(message)){
        ;  
    } else {
        ;  
    }
    
    file.close();
    
}
// Append File
void appendFile(fs::FS &fs, const char * path, const char * message){
    
    // Append File
    path;
    
    File file = fs.open(path, FILE_APPEND);
    
    if(!file){
        return;
    }
    
    if(file.print(message)){
        ;  
    } else {
        ;  
    }
    
    file.close();
    
}

getSHTC3.ino

Arduino
// SHTC3 Temperature and Humidity Sensor
// SHTC3
void isSHTC3(){

  // SHTC3 Temperature and Humidity Sensor
  if (sht.readSample()) {
     
     // Temperature
     T = sht.getTemperature();
     // Humidity
     H = sht.getHumidity();

  }

}

getVOC.ino

Arduino
// MEMS VOC Gas
// is VOC
void isVOC(){

  // MEMS VOC Gas
  x = analogRead( iSensorVOC );
  iSensorValueVOC = map(x, 1, 4095, 1, 500);
  
}

setup.ino

Arduino
// Setup
void setup()
{
  
  // Give display time to power on
  delay(100);

  // EEPROM Size
  EEPROM.begin(EEPROM_SIZE);
  
  // EEPROM Unique ID
  isUID();
  
  // Delay
  delay( 100 );

  // Wire
  Wire.begin();

  // Delay
  delay( 100 );

  // SHTC3 Temperature and Humidity Sensor
  sht.init();
  // SHT3x
  sht.setAccuracy(SHTSensor::SHT_ACCURACY_MEDIUM);

  // Delay
  delay( 100 );
  
  // DFRobot Display 240x320
  screen.begin();

  // Delay
  delay(100);

  // MicroSD Card
  isSetupSD();

  // Initialize the LED Green
  pinMode(iLEDGreen, OUTPUT);

  // iLEDGreen HIGH
  digitalWrite(iLEDGreen, HIGH );

  // DFRobot Display 240x320 - UID
  // Don Luc Electronics
  // Version
  // EEPROM
  isDisplayUID();

  // Delay 5 Second
  delay( 5000 );

}

Credits

NeoSteamLabs
40 projects • 15 followers
Luc Paquin Microcontrollers, IoT, Robotics Experts https://www.donluc.com https://www.donluc.com/luc https://www.linkedin.com/in/jlucpaquin

Comments

Related channels and tags
  • DFRobot
  • Displays
  • Displays
  • Internet of Things
  • Internet of Things
  • Sensors
  • Sensors
  • SparkFun