API for the MQ5 Gas Sensor. More...

Detailed Description

ID: mq5
Name: MQ5 Natural Gas and Liquefied Petroleum Gas (LPG) Sensor
Category: gaseous
Manufacturer: seeed
Connection: analog
Link: http://wiki.seeed.cc/Grove-Gas_Sensor-MQ5/
Kit: eak

The MQ5 Gas Sensor module is useful for gas leakage detection (in home and industry). It can detect LPG, natural gas, town gas, and so on. It is highly sensitive and has a detection range of 300-10,000 ppm.

int
main(int argc, char** argv)
{
    upm::MQ5 sensor(0);
    signal(SIGINT, sig_handler);
    thresholdContext ctx;
    ctx.averageReading = 0;
    ctx.runningAverage = 0;
    ctx.averagedOver = 2;
    while (!is_running) {
        int len = sensor.getSampledWindow(2, 128, buffer);
        if (len) {
            int thresh = sensor.findThreshold(&ctx, 30, buffer, len);
            sensor.printGraph(&ctx, 7);
            if (thresh) {
                // do something ....
            }
        }
    }
    std::cout << "exiting application" << std::endl;
    return 0;
}

Public Member Functions
	MQ5 (int gasPin)

	~MQ5 ()

std::string	name ()

Public Member Functions inherited from Gas
	Gas (int gasPin)

virtual	~Gas ()

virtual int	getSampledWindow (unsigned int freqMS, int numberOfSamples, uint16_t *buffer)

virtual int	findThreshold (thresholdContext ctx, unsigned int threshold, uint16_t buffer, int len)

virtual int	getSampledData (thresholdContext *ctx)

virtual int	getSample ()

virtual void	printGraph (thresholdContext *ctx, uint8_t resolution)