30 lines
621 B
C++
30 lines
621 B
C++
#include "MQ7.h"
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void MQ7_Init()
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{
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pinMode(digitalMQ7, INPUT);
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pinMode(analogMQ7, INPUT);
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}
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void MQ7_Read(float &sensorVolt, float &RSAir, float &R0, float &sensorValue)
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{
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analogWrite(analogMQ7, 1023);
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delay(60000);
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analogWrite(analogMQ7, (1023/5)*1.4 );
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for(int i = 0; i<100; i++)
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{
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sensorValue = sensorValue + analogRead(analogMQ7);
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delay(90000);
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}
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sensorValue = sensorValue/100.0;
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sensorVolt = sensorValue/1024*5.0;
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RSAir = (5.0-sensorVolt)/sensorVolt;
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R0 = RSAir/(26+(1/3));
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Serial.print("R0 = ");
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Serial.println(R0);
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delay(1000);
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} |