   int val=Wire.read();
   switch (val) {
     case 1:
-      Serial.println("Success");
+      //Serial.println("Success");
       break;
     case 2:
-      Serial.println("Failed");
+      //Serial.println("Failed");
       return String("Failed");
       break;
     case 254:
-      Serial.println("Pending");
+      //Serial.println("Pending");
       break;
     case 255:
-      Serial.println("No Data");
+      //Serial.println("No Data");
       break;
     default:
-      Serial.printlnf("Invalid response %d",val);
+      //Serial.printlnf("Invalid response %d",val);
       return String("Failed");
   }
 

  String orp_data = executeRequest(ORP_ADDRESS,"R");
  //Serial.print("ORP:");
  //Serial.println(orp_data);
  if (isdigit(orp_data[0])) {
    float current = String(orp_data).toFloat();
    if(orp == 0)
      orp = current;
    else
      orp = (orp + current) / 2;


int switchcalibrationmode(String arg) {
  calibrationmode = !calibrationmode;
  if(calibrationmode) {
    digitalWrite(CALIBRATION_LED, HIGH);
    nextSleepTime = millis() + SAMPLE_INTERVAL;
  } else {
    digitalWrite(CALIBRATION_LED, LOW);
    nextSleepTime = millis() + WAKE_INTERVAL;
  }
  return 0;
}

int switchtemponly(String arg) {
  temponly = !temponly;
  return 0;
}

int calibrate_ph(String arg) {
