waiting on serial prevents the firmware from starting up on battery power

src/devices/arduino/printable_serial.cpp

@@ -12,7 +12,7 @@ namespace sta
           mutex_{mutex}
     {
         Serial.begin(baud);
-        while (!Serial);
+        //while (!Serial);
     }
 
     void PrintableSerial::print(const char * str, size_t length)