Sketch uses 3832 bytes (11%) of program storage space. Maximum is 32256 bytes. Global variables use 89 bytes (4%) of dynamic memory, leaving 1959 bytes for local variables. Maximum is 2048 bytes. C:\Program Files\Arduino\hardware\tools\avr/bin/avrdude -CC:\Program Files\Arduino\hardware\tools\avr/etc/avrdude.conf -v -patmega328p -carduino -PCOM1 -b115200 -D -Uflash:w:C:\Users\user\AppData\Local\Temp\arduino_build_332700/sketch_nov04a.ino.hex:i avrdude: Version 6.3-20171130 Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/ Copyright (c) 2007-2014 Joerg Wunsch System wide configuration file is "C:\Program Files\Arduino\hardware\tools\avr/etc/avrdude.conf" Using Port : COM1 Using Programmer : arduino Overriding Baud Rate : 115200 avrdude: ser_open(): can't open device "\\.\COM1": The system cannot find the file specified. avrdude done. Thank you. Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.