HEPTA-Sat Training 2019 / Mbed 2 deprecated Lab7-sample_AIR-QUALITYsensor

Grove Air quality sensor program

Dependencies:   Grove_Air_Quality_Sensor_Library mbed

Connection

VDD → 3.3V or 5V (supply voltage)

GND → GND

SIG → p15 (mbed)

NC → Non connection

main.cpp@2:225383599b95, 2019-11-06 (annotated)

Committer:
HeptaSatTraining2019
Date:
Wed Nov 06 18:32:23 2019 +0000
Revision:
2:225383599b95
Parent:
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#include"mbed.h"





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#include"Air_Quality.h"





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AirQuality airqualitysensor;





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int current_quality = -1;





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PinName analogPin = p15;





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// Interrupt Handler





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void AirQualityInterrupt()





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{





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    AnalogIn sensor(analogPin);





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    airqualitysensor.last_vol = airqualitysensor.first_vol;





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    airqualitysensor.first_vol = sensor.read()*1000;





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    airqualitysensor.timer_index = 1;





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}





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// Main loop





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int main()





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{





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    airqualitysensor.init(analogPin, AirQualityInterrupt);





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    while(1) {





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        current_quality=airqualitysensor.slope();





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        if (current_quality >= 0) { // if a valid data returned.





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            if (current_quality == 0)





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                printf("High pollution! Force signal active\n\r");





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            else if (current_quality == 1)





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                printf("High pollution!\n\r");





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            else if (current_quality == 2)





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                printf("Low pollution!\n\r");





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            else if (current_quality == 3)





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                printf("Fresh air\n\r");





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        }





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    }





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}