gasMonitor_x8.ino

/*
betlog - 2019-07-19--17-18-27
*/


String S1title="MQ-2 Smoke";
String S2title="MQ-3 Alcohol";
String S3title="MQ-4 Methane";
String S4title="MQ-5 Propane";
String S5title="MQ-6 LPG";
String S6title="MQ-7 CO2";
String S7title="MQ-8 Hydrogen";
String S8title="MQ-135 Air Quality";

int titleRedisplayThresh=20;

int const S1 = A0;
int const S2 = A1;
int const S3 = A2;
int const S4 = A3;
int const S5 = A4;
int const S6 = A5;
int const S7 = A6;
int const S8 = A7;
//-----------------------
int titleRedisplay=1;
float S1now;
float S2now;
float S3now;
float S4now;
float S5now;
float S6now;
float S7now;
float S8now;
float S1prior;
float S2prior;
float S3prior;
float S4prior;
float S5prior;
float S6prior;
float S7prior;
float S8prior;

void setup() {
    Serial.begin(115200);
    pinMode (S1, INPUT);
    pinMode (S2, INPUT);
    pinMode (S3, INPUT);
    pinMode (S4, INPUT);
    pinMode (S5, INPUT);
    pinMode (S6, INPUT);
    pinMode (S7, INPUT);
    pinMode (S8, INPUT);
}

void loop() {

    delay(2000);
    String S1symbol;
    String S2symbol;
    String S3symbol;
    String S4symbol;
    String S5symbol;
    String S6symbol;
    String S7symbol;
    String S8symbol;

    S1now=analogRead(S1)/1024.000;
    if (S1now == S1prior) {
        S1symbol="";
    } else {
        if (S1now > S1prior) {
            S1symbol="+";
        } else {
            if (S1now < S1prior) {
                S1symbol="-";
            }
        }
    }
    S1prior=S1now;

    S2now=analogRead(S2)/1024.0;
    if (S2now == S2prior) {
        S2symbol="";
    } else {
        if (S2now > S2prior) {
            S2symbol="+";
        } else {
            if (S2now < S2prior) {
                S2symbol="-";
            }
        }
    }
    S2prior=S2now;

    S3now=analogRead(S3)/1024.0;
    if (S3now == S3prior) {
        S3symbol="";
    } else {
        if (S3now > S3prior) {
            S3symbol="+";
        } else {
            if (S3now < S3prior) {
                S3symbol="-";
            }
        }
    }
    S3prior=S3now;

    S4now=analogRead(S4)/1024.0;
     if (S4now == S4prior) {
        S4symbol="";
    } else {
        if (S4now > S4prior) {
            S4symbol="+";
        } else {
            if (S4now < S4prior) {
                S4symbol="-";
            }
        }
    }
    S4prior=S4now;

    S5now=analogRead(S5)/1024.0;
    if (S5now == S5prior) {
        S5symbol="";
    } else {
        if (S5now > S5prior) {
            S5symbol="+";
        } else {
            if (S5now < S5prior) {
                S5symbol="-";
            }
        }
    }
    S5prior=S5now;

    S6now=analogRead(S6)/1024.0;
    if (S6now == S6prior) {
        S6symbol="";
    } else {
        if (S6now > S6prior) {
            S6symbol="+";
        } else {
            if (S6now < S6prior) {
                S6symbol="-";
            }
        }
    }
    S6prior=S6now;

    S7now=analogRead(S7)/1024.0;
    if (S7now == S7prior) {
        S7symbol="";
    } else {
        if (S7now > S7prior) {
            S7symbol="+";
        } else {
            if (S7now < S7prior) {
                S7symbol="-";
            }
        }
    }
    S7prior=S7now;

    S8now=analogRead(S8)/1024.0;
    if (S8now == S8prior) {
        S8symbol="";
    } else {
        if (S8now > S8prior) {
            S8symbol="+";
        } else {
            if (S8now < S8prior) {
                S8symbol="-";
            }
        }
    }
    S8prior=S8now;

    if (titleRedisplay == 1) {
        Serial.println(S1title + "\t" + S2title + "\t" + S3title + "\t" + S4title + "\t" + S5title + "\t\t" + S6title + "\t\t" + S7title + "\t" + S8title );
    } else {
        if (titleRedisplay == titleRedisplayThresh) {
            titleRedisplay=0;
        }
    }
    titleRedisplay++;


    Serial.print(S1now, 3);
    Serial.print(" ");
    Serial.print(S1symbol);
    Serial.print("\t\t");

    Serial.print(S2now, 3);
    Serial.print(" ");
    Serial.print(S2symbol);
    Serial.print("\t\t");

    Serial.print(S3now, 3);
    Serial.print(" ");
    Serial.print(S3symbol);
    Serial.print("\t\t");

    Serial.print(S4now, 3);
    Serial.print(" ");
    Serial.print(S4symbol);
    Serial.print("\t\t");

    Serial.print(S5now, 3);
    Serial.print(" ");
    Serial.print(S5symbol);
    Serial.print("\t\t");

    Serial.print(S6now, 3);
    Serial.print(" ");
    Serial.print(S6symbol);
    Serial.print("\t\t");

    Serial.print(S7now, 3);
    Serial.print(" ");
    Serial.print(S7symbol);
    Serial.print("\t\t");

    Serial.print(S8now, 3);
    Serial.print(" ");
    Serial.print(S8symbol);
    Serial.print("\t\t");


    Serial.println("");
}