Gravity: Factory Calibrated Laser Quantitative Methane Sensor for Research (Lab-Grade CH4 Data + No Code Excel Export) แท้จาก DFRobot

 /*!
* @file get conncentration.ino
* @brief get ch4 conncentration
* @copyright Copyright (c) 2025 DFRobot Co.Ltd (http://www.dfrobot.com)
* @license The MIT License (MIT)
* @author ZhixinLiu(zhixin.liu@dfrobot.com)
* @version V1.0.0
* @date 2025-04-24
* @url https://github.com/DFRobot/DFRobot_MHZ9041A
*/

#include "DFRobot_MHZ9041A.h"

#define I2C_COMMUNICATION //use I2C for communication, but use the serial port for communication if the line of codes were masked

#ifdef I2C_COMMUNICATION
DFRobot_MHZ9041A_I2C ch4(&Wire ,0x34);
#else
/* -----------------------------------------------------------------------------------------------------
* | Sensor | Connect line | Leonardo/Mega2560/M0 | UNO | ESP8266 | ESP32 | microbit | m0 |
* | VCC |=============>| VCC | VCC | VCC | VCC | X | vcc |
* | GND |=============>| GND | GND | GND | GND | X | gnd |
* | RX |=============>| Serial1 TX1 | 5 | 5/D6 | D2 | X | tx1 |
* | TX |=============>| Serial1 RX1 | 4 | 4/D7 | D3 | X | rx1 |
* ----------------------------------------------------------------------------------------------------*/
/* Baud rate cannot be changed */
#if defined(ARDUINO_AVR_UNO) || defined(ESP8266)
SoftwareSerial mySerial(4, 5);
DFRobot_MHZ9041A_UART ch4(&mySerial, 115200);
#elif defined(ESP32)
DFRobot_MHZ9041A_UART ch4(&Serial1, 115200 ,/*rx*/D2 ,/*tx*/D3);
#else
DFRobot_MHZ9041A_UART ch4(&Serial1, 115200);
#endif
#endif

void setup()
{
Serial.begin(115200);
while(!ch4.begin()){
Serial.println("NO Deivces !");
delay(1000);
} Serial.println("Device connected !");

//ch4.reset();
ch4.setMode(ePassivityMode); // set Passivity mode
}

void loop()
{
float ch4Concentration = ch4.getCH4Concentration(); // get CH4 concentration
float temperature = ch4.getTemperature(); // get temperature
eFaultCode_t errorCode = ch4.getErrorMsg(); // get error code
String sourceData = ch4.getSourceData(); // get source data
Serial.print("CH4 Concentration: ");
Serial.print(ch4Concentration, 2); // print CH4 concentration
Serial.println("%LEL");
Serial.print("Temperature: ");
Serial.print(temperature, 2); // print temperature
Serial.println("C");
Serial.print("Error Code: ");
Serial.println(errorCode); // print error code
Serial.print("Source Data: ");
Serial.println(sourceData); // print source data
Serial.println("===================================");
delay(20);
}

/**
* @enum eFaultCode_t
* @brief Types of sensor fault codes
*/
typedef enum {
eSensorNormal = 0x00, // 00 Sensor operating normally
eTempControlError = 0x01, // 01 Temperature control error
eAmbientTempError = 0x02, // 02 Ambient temperature error
eAmbientAndTempControlError = 0x03, // 03 Ambient temperature error & temperature control error
eLaserSignalWeak = 0x04, // 04 Weak laser signal
eAmbientAndSignalWeakError = 0x06, // 06 Ambient temperature error & weak laser signal
eLaserSignalError = 0x10, // 16 Laser signal error
eAmbientAndSignalError = 0x12, // 18 Ambient temperature error & laser signal error
} eFaultCode_t;

/**
* @enum eModuleMode_t
* @brief sensor work mode
*/
typedef enum {
ePassivityMode = 0x00,
eActiveMode = 0x01,
} eWorkMode_t;

/**
* @fn setMode
* @brief Set the working mode
* @param mode Working mode
* @note 0x00: Active mode, 0x01: Passive mode
* @return null
*/
void setMode(eWorkMode_t mode);

/**
* @fn getSourceData
* @brief Get raw sensor data
* @return Raw data string, up to 43 bytes in length
*/
String getSourceData(void);

/**
* @fn getCH4Concentration
* @brief Get methane (CH4) concentration
* @return CH4 concentration value, two decimal places, the second digit is always 0, unit: %LEL
*/
float getCH4Concentration(void);

/**
* @fn getTemperature
* @brief Get ambient temperature
* @return Temperature in degrees Celsius
*/
float getTemperature(void);

/**
* @fn getErrorMsg
* @brief Get error code information
* @return Error code
*/
eFaultCode_t getErrorMsg(void);

/**
* @fn getActiveData
* @brief Get raw data in active reporting mode
* @return Raw data string in active mode
*/
String getActiveData(void);

/**
* @fn reset
* @brief Reset the onboard methane sensor; hold the reset pin low for 2 seconds to complete the reset
* @return null
*/
void reset(void);

/**
* @fn setDeviceID
* @brief Set the module address,range 0x03~0x7F
* @return Returns 1 if successful, otherwise returns 0
*/
bool setDeviceID(uint8_t id);

/**
* @fn getDeviceID
* @brief Get the module address
* @return Module address
*/
uint8_t getDeviceID(void);