PLX-DAQ version 2 - now with 64 bit support! (and further new features)

Using Arduino Interfacing w/ Software on the Computer
296

Try using just the one println and see if it helps.

oid loop() {
  milli_time = millis();
  voltTC = 5.000 * analogRead(A0) / 1024.000;
  voltTH = 5.000 * analogRead(A1) / 1024.000;
  voltpH = 5.000 * analogRead(A2) / 1024.000;
  Serial.print("DATA,TIME,");
  Serial.print(milli_time);
  Serial.print(",");
  Serial.print(voltTC);
  Serial.print(",");
  Serial.print(voltTH);
  Serial.print(",");
  Serial.println(voltpH);  //last serial command uses println
  
    
  delay(1000);