Bryan Bates / Mbed 2 deprecated Lab4_4180

MQ-7 Gas Sensor demo

Dependencies:   mbed

Dependents:   GloboMet

MQ7.h

Committer:
bryanbates
Date:
2016-10-31
Revision:
1:6f35304675ae
Parent:
0:ff650029fdf8

File content as of revision 1:6f35304675ae:


#ifndef MQ7_H
#define MQ7_H

#include "mbed.h"

// Interface to control an MQ-7 (Carbon Monoxide) sensor 

class MQ7 {
public:

    /** Create interfaces with gas sensor module
     *
     * @param alr A DigitalIn, alarm output to microcontroller
     * @param hsw A PwmOut, heat switch input from microcontroller, active low
     */
    MQ7(PinName alr, PinName hsw) : _alr(alr), _hsw(hsw){}
    
    int getAlarm(){
        return _alr.read();
    }
    
    void setHeat(float voltage){
        _hsw.write(voltage);
    }
     

protected:
    DigitalIn _alr;
    PwmOut _hsw;

};

#endif