Hello There!

I have a problem with Fermion: MEMS Gas Sensor - MiCS-2714, trying to make Hydrogen Detector System and when I use sample code from DFRobot I always have 0.0PPM (getGasPPM). I'am producing hydrogen with electrolyzer method directly to sensor so there should be atleast 1ppm of Hydrogen.

Please check my code:

Ofcourse everything is connected as it should be.

EDIT:

Im using the newer Arduino board Wifi R4.

/*!

* @file getGasPPM.ino

* @brief Reading Gas concentration, A concentration of one part per million (PPM).

* @n When using IIC device, select I2C address,

* @n the dialing switch A0, A1 (MICS_ADDRESS_0 is [0 0]), (MICS_ADDRESS_1 is [1 0])

* @n (MICS_ADDRESS_2 is [0 1]), (MICS_ADDRESS_3 is [1 1]).

* @n When using the Breakout version, connect the adcPin and PowerPin

* @copyright Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)

* @license The MIT License (MIT)

* @author ZhixinLiu(zhixin.liu@dfrobot.com)

* @version V1.2

* @date 2021-06-18

* @url https://github.com/DFRobot/DFRobot_MICS

*/

#include "DFRobot_MICS.h"

#define CALIBRATION_TIME 3 // Default calibration time is three minutes

// When using I2C communication, use the following program to construct an object by DFRobot_MICS_I2C

/**

* select i2c device address

* MICS_ADDRESS_0 0x75

* MICS_ADDRESS_1 0x76

* MICS_ADDRESS_2 0x77

* MICS_ADDRESS_3 0x78

*/

//#define MICS_I2C_ADDRESS MICS_ADDRESS_0

//DFRobot_MICS_I2C mics(&Wire, MICS_I2C_ADDRESS);

// When using the Breakout version, use the following program to construct an object from DFRobot_MICS_ADC

/**

* adcPin is A0~A5

* powerPin is General IO

*/

#define ADC_PIN A0

#define POWER_PIN 10

DFRobot_MICS_ADC mics(/*adcPin*/ADC_PIN, /*powerPin*/POWER_PIN);

void setup()

{

Serial.begin(115200);

while(!Serial);

while(!mics.begin()){

Serial.println("NO Deivces !");

delay(1000);

} Serial.println("Device connected successfully !");

/**

* Gets the power mode of the sensor

* The sensor is in sleep mode when power is on,so it needs to wake up the sensor.

* The data obtained in sleep mode is wrong

*/

uint8_t mode = mics.getPowerState();

if(mode == SLEEP_MODE){

mics.wakeUpMode();

Serial.println("wake up sensor success!");

}else{

Serial.println("The sensor is wake up mode");

}

/**

* Do not touch the sensor probe when preheating the sensor.

* Place the sensor in clean air.

* The default calibration time is 3 minutes.

*/

while(!mics.warmUpTime(CALIBRATION_TIME)){

Serial.println("Please wait until the warm-up time is over!");

delay(1000);

}

}

void loop()

{

/**

* Gas type:

* MICS-4514 You can get all gas concentration

* MICS-5524 You can get the concentration of CH4, C2H5OH, H2, NH3, CO

* MICS-2714 You can get the concentration of NO2

* CO = 0x01 (Carbon Monoxide) (1 - 1000)PPM

* CH4 = 0x02 (Methane) (1000 - 25000)PPM

* C2H5OH = 0x03 (Ethanol) (10 - 500)PPM

* H2 = 0x06 (Hydrogen) (1 - 1000)PPM

* NH3 = 0x08 (Ammonia) (1 - 500)PPM

* NO2 = 0x0A (Nitrogen Dioxide) (0.1 - 10)PPM

*/

float gasdata = mics.getGasData(H2);

Serial.print(gasdata,1);

Serial.println(" PPM");

delay(1000);

//mics.sleepMode();

}