Read_Sensor

void setup() {
Serial.begin(9600);
  Serial1.begin(9600);
}
// int i = 0;
int C02H;
int C02L;

int formaldehydeH;
int formaldehydeL;

int TVOCH;
int TVOCL;

int PM25H;
int PM25L;

int PM10H;
int PM10L;

int TempH;
int TempL;

int HumdH;
int HumdL;
int myval;

String combineTwoIntIntoOneString(byte value1,byte value2){
    String string1 = String(value1);
    String string2 = String(value2);
    String string3;
    string3 = string1 + "," + string2;
    //Serial.println(string1);
    //Serial.println(string2);
    //Serial.println(string3);
    String y;
    //char *endptr;
    y = string3;
    // Serial.println(x / 10, 2);
  return  y;
}
int combineTwoHexIntoOneInt(byte value1,byte value2){
    String string1 = String(value1, HEX);
    String string2 = String(value2, HEX);
    String string3;
    long int li1;
    long int li2;
    long int y;
    char *endptr;
    li1 = strtol(string1.c_str(), &endptr, 16);
    li2 = strtol(string2.c_str(), &endptr, 16);
    //string3 = string4 + string2;


    y = (li1*256)+li2;
    // Serial.println(x / 10, 2);
  return y;
}
void parseDataStream(byte X, int i) {
  if (i == 2) {
    C02H = X;
  }
  if (i == 3) {
    C02L = X;
    // Serial.print("C02 HEX Value:  ");
    // Serial.print(C02H, HEX);
    // Serial.print(" ");
    // Serial.println(C02L, HEX);
    Serial.print("C02          :  ");
    Serial.println(combineTwoHexIntoOneInt(C02H,C02L));
  }
  if (i == 4) {
    formaldehydeH = X;
  }
  if (i == 5) {
    formaldehydeL = X;
    // Serial.print("FormaldehydeH HEX Value:  ");
    // Serial.print(formaldehydeH, HEX);
    // Serial.print(" ");
    // Serial.println(formaldehydeL, HEX);
    Serial.print("Formaldehyde :  ");
    // Serial.println(formaldehydeH * 256 + formaldehydeL);
    Serial.println(combineTwoHexIntoOneInt(formaldehydeH,formaldehydeL));

    
  }
  if (i == 6) {
    TVOCH = X;
  }
  if (i == 7) {
    TVOCL = X;
    // Serial.print("TVOC HEX Value:  ");
    // Serial.print(TVOCH, HEX);
    // Serial.print(" ");
    // Serial.println(TVOCL, HEX);
    Serial.print("TVOC         :  ");
    // Serial.println(TVOCH * 256 + TVOCL);
    Serial.println(combineTwoHexIntoOneInt(TVOCH,TVOCL));

  }
  if (i == 8) {
    PM25H = X;
  }
  if (i == 9) {
    PM25L = X;
    // Serial.print("PM2.5 HEX Value:  ");
    // Serial.print(PM25H, HEX);
    // Serial.print(" ");
    // Serial.println(PM25L, HEX);
    Serial.print("PM2.5        :  ");
    // Serial.println(PM25H * 256 + PM25L);
    Serial.println(combineTwoHexIntoOneInt(PM25H,PM25L));

  }
  if (i == 10) {
    PM10H = X;
  }
  if (i == 11) {
    PM10L = X;
    // Serial.print("PM10 HEX Value:  ");
    // Serial.print(PM10H, HEX);
    // Serial.print(" ");
    // Serial.println(PM10L, HEX);
    Serial.print("PM10         :  ");
    // Serial.println(PM10H * 256 + PM10L);
    Serial.println(combineTwoHexIntoOneInt(PM10H,PM10L));

  }

  if (i == 12) {
    TempH = X;
  }
  if (i == 13) {
    TempL = X;
    //Serial.print("temph");
    //Serial.println(TempH);
    //Serial.print("templ");
    //Serial.println(TempL);
    // Serial.print("Temperature HEX Value:  ");
    // Serial.print(TempH, HEX);
    // Serial.print(" ");
    // Serial.println(TempL, HEX);
    Serial.print("Temperature  :  ");
    // Serial.println((TempH * 256 + TempL));
    Serial.println(combineTwoIntIntoOneString(TempH,TempL));
    
    //For Negative Values, a bit buggy tho
    // Serial.println((TempH << 8) | TempL);


  }

  if (i == 14) {
    HumdH = X;
  }
  if (i == 15) {
    HumdL = X;
    // Serial.print("Humidity HEX Value:  ");
    // Serial.print(HumdH, HEX);
    // Serial.print(" ");
    // Serial.println(HumdL, HEX);
    Serial.print("Humidity     :  ");
    // Serial.println((HumdH+ HumdL));
    Serial.println(combineTwoIntIntoOneString(HumdH,HumdL));

  }
}

void loop() {

  for (int k = 0; k < 17; k++) {
    while (!Serial1.available())
      ;  // wait for a character
    int incomingByte = Serial1.read();
    // Serial.print(incomingByte,HEX);
    // Serial.print(' ');
    parseDataStream(incomingByte, k);
  }
  Serial.println();
}