Home/ Questions/What should I do when facing the error: avrdude: ser_open(): can't open device "\\.\com3": the system cannot find the file specified.
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elveralowe
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Asked: 2022-06-19T16:39:31+00:00 In:

What should I do when facing the error: avrdude: ser_open(): can’t open device “\\.\com3”: the system cannot find the file specified.

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Hello everyone. I’m having a hard time with: avrdude: ser_open(): can’t open device “\\.\com3”: the system cannot find the file specified, but I’m not sure how to fix it.

avrdude: Version 6.3, compiled on Jan 17 2017 at 12:00:53
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch

System wide configuration file is "C:\\\\Program Files (x86)\\\\Arduino\\\\hardware\\\\tools\\\\avr/etc/avrdude.conf"

Using Port : COM1
Using Programmer : arduino
An error occurred while uploading the sketch
Overriding Baud Rate : 57600
avrdude: ser_open(): can't open device "\\\\\\\\.\\\\COM1": The system cannot find the file specified.

avrdude done.Thank you.
Is there anyone who can help me figure out how to fix this problem? Please write below. Thanks!
avrdude: ser_open(): can't open device
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1 Answer

  1. Best Answer
    Expert

    The cause:

    I’ve discovered the root of your problem after hours of investigation. Errors in programs can be caused by three things:

    1. Because you disabled the section – “show verbose output during compilation”, you’re seeing this Arduino problem.

    2. Arduino do not upload and show the error: “ser_open(): can’t open device.COM1”. The kind of this error is arduino port error.

    3. You haven’t made any decisions about the board’s configuration.

    Solution:

    You must select a board name as well as a port number.

    Go to tool section top menu -> select a name for the bulletin board “which mention on your board”, and the port sections will be highlighted automatically. Select one of them and check building and uploading the code; you should observe successful results.

    You may notice this successful text in your compiler after you’ve uploaded your blinking code.  

    avrdude: Version 6.3, compiled on Jan 17 2017 at 12:00:53
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch

System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf"

Using Port : COM3
Using Programmer : arduino
Overriding Baud Rate : 115200
AVR Part : ATmega328P
Chip Erase delay : 9000 us
PAGEL : PD7
BS2 : PC2
RESET disposition : dedicated
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :

Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
eeprom 65 20 4 0 no 1024 4 0 3600 3600 0xff 0xff
flash 65 6 128 0 yes 32768 128 256 4500 4500 0xff 0xff
lfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
efuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
lock 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00

Programmer Type : Arduino
Description : Arduino
Hardware Version: 3
Firmware Version: 4.4
Vtarget : 0.3 V
Varef : 0.3 V
Oscillator : 28.800 kHz
SCK period : 3.3 us

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x1e950f (probably m328p)
avrdude: reading input file "C:\Users\TECHMA~1\AppData\Local\Temp\arduino_build_321343/Blink.ino.hex"
avrdude: writing flash (948 bytes):

Writing | ################################################## | 100% 0.16s

avrdude: 948 bytes of flash written
avrdude: verifying flash memory against C:\Users\TECHMA~1\AppData\Local\Temp\arduino_build_321343/Blink.ino.hex:
avrdude: load data flash data from input file C:\Users\TECHMA~1\AppData\Local\Temp\arduino_build_321343/Blink.ino.hex:
avrdude: input file C:\Users\TECHMA~1\AppData\Local\Temp\arduino_build_321343/Blink.ino.hex contains 948 bytes
avrdude: reading on-chip flash data:

Reading | ################################################## | 100% 0.13s

avrdude: verifying ...
avrdude: 948 bytes of flash verified

avrdude done. Thank you.

    Check the led blinking code after you’ve configured these options.

    

    

    // the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(LED_BUILTIN, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW
delay(5000); // wait for a second
}
    

    

    If you follow my advice, you should be somewhat be able to solve your problem quickly. Best of luck!!!
    
						
    
						
    
												
    
												
    
								
      
			
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