buf_1[cnt_1] = byte_rcvd;

cnt_1++;


if (byte_rcvd == 0xA)       //Sensor has sent 0xA (/r)

{ unsigned char *ptr = buf_1;

  //debug_buf(ptr, sizeof(buf_1));

  eval_SensorCO2(ptr, cnt_1); // sizeof(buf_1));

  //Reset Buffer

  memset(buf_2, 0, sizeof(buf_1));

  cnt_1 = 0;

  continue;

}

buf_2[cnt_2] = byte_rcvd;

cnt_2++;




if (byte_rcvd == 0xAB)       //Sensor has sent AB (EoM)

{ unsigned char *ptr = buf_2;

  //debug_buf(ptr, sizeof(buf_2));

  eval_SensorNOVA(ptr, sizeof(buf_2));

  //Reset Buffer

  memset(buf_2, 0, sizeof(buf_2));

  cnt_2 = 0;

  snd_cmd("Z");     //Trigger the CO2 sensor to send latest measurement

  continue;
}

return;

return;

uint16_t  ppm = (buf[7] - 0x30) + 10 * (buf[6] - 0x30) + 100 * (buf[5] - 0x30) + 1000 * (buf[4] - 0x30) + 10000 * (buf[3] - 0x30); //0x30 is the offset for the ASCII code (i.e.        "0" = ASCII (48) = ASCII (0x30) )

Wire.beginTransmission(10);

Wire.write(ppm);

Wire.endTransmission();

return;

unsigned char = Wire.read(); // receive byte as a character

// Serial.print(c);

{

  uint16_t ppm = Wire.read();

  Serial.print("Last CO2 Reading:");

  Serial.print(ppm);

  Serial.print(" ppm");

  Serial.print("nn");


  uint16_t PM25 = Wire.read();

  Serial.print("PM2.5: ");

  Serial.print(PM25);

  Serial.print(" ug/m3n");

  uint16_t PM100 = Wire.read();

  Serial.print("PM10: ");

  Serial.print(PM100);

  Serial.print(" ug/m3n");




}