     messageString = messageString + String(temp2C, 2);
   }
   messageString = messageString + " V:";
-  messageString = messageString + String(vIn, 2);
+  messageString = messageString + String(vcc, DEC);
   messageString = messageString + "\n";
 
   // Prepare and send message

int messageId = 0;
float temp1C = -127.00; //-127.00 is the error temp
float temp2C = -127.00; //-127.00 is the error temp
float vIn = 0.00;

// watchdog interrupt
ISR(WDT_vect) {
  wdt_disable();  // disable watchdog
}

void myWatchdogEnable(const byte interval) {  
  MCUSR = 0;                          // reset various flags
  WDTCSR |= 0b00011000;               // see docs, set WDCE, WDE
  WDTCSR =  0b01000000 | interval;    // set WDIE, and appropriate delay

  wdt_reset();
  set_sleep_mode (SLEEP_MODE_PWR_DOWN);  
  sleep_mode();            // now goes to Sleep and waits for the interrupt
}

void setup() {

  digitalWrite(LED_PIN_TX, HIGH); 
  delay(1000);
  digitalWrite(LED_PIN_TX, LOW);
  
}
