Sketch uses 444 bytes (1%) of program storage space. Maximum is 30720 bytes. Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes. "C:\Users\debji\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/bin/avrdude" "-CC:\U…

Without additional information I would assume that there is no Arduino connected to COM7.

im having the same problem but im so very sure that i connected to the right port!! its stressing me out..it wasnt the arduino's problem because i tested on my lecturer's laptop and they worked fine..so smtg is wrong with my laptop somehow??idk

Have you seen/read this recent discussion: [image] Im using arduino nano but im facing error like cannot set com state Classic Nano how to resolve this i tried two different board and also two different cables avrdude: ser_open(): can't set com-state for "\.\COM5" It…

I'll share some instructions you can follow for uninstalling and reinstalling the CH340 device. Other users experiencing this "can't set com-state" error reported doing so fixed the problem, as mentioned by markd833. Close Arduino IDE if it is running. Connect the Arduino board to your computer wi…

I had same problem with arduino nano. When I try to upload I get (ser_open(): can't set com-state for "\.\COM3" ) error message. I can upload same code to Arduino uno with same configuration. Your instruction perfectly solve my problem. Thank you very much :smiling_face_with_three_hearts:

Great. Can tell us which windows version you are using?

I got this issue with clone Arduno Nano board after updating to Windows 11 and Arduino IDE 2.2.0. This problem seems to appear on CH340 based clone boards. Steps to fix. Download CH341PAR.exe. https://www.wch.cn/downloads/CH341PAR_EXE.html Plug in Nano. Open Device manager and find the "USB-SERI…

I tried these steps but I am still getting the same error "avrdude: ser_open(): can't set com-state for "\.\COM7" Failed uploading: uploading error: exit status 1"

Hi @tanuhc . Other affected users have reported that doing a "roll back" to an older version of the driver was an effective workaround. You can give that a try. I'll provide instructions: Open this tutorial from SparkFun in your browser: https://learn.sparkfun.com/tutorials/how-to-install-ch340-d…

Hello, I can't click on "Roll back driver", it's greyed out. I updated windows to see if that would fix it, but no luck. Please help, thank you!

Avrdude: ser_open(): can't set com-state for "\\.\COM7"

Development Tools Uploading

markd833 May 23, 2023, 3:57pm 4

Have you seen/read this recent discussion:

It seems that reinstalling the driver for your particular Serial-USB chip might help resolve the issue.

Topic		Replies	Views
Avrdude: ser_open(): can't set com-state for "\\.\COM7" Uploading	11	2169	July 21, 2023
Avrdude: ser_open(): can't set com-state for "\\.\COM5" IDE 1.x	21	11470	December 3, 2023
Avrdude: ser_open(): can't set com-state for "\\.\COM5" - Possible solution Uploading	11	443	September 15, 2025
Avrdude: ser_open(): can't set com-state for "\\.\COM3" Failed uploading: uploading error: exit status 1 IDE 2.x	37	29650	March 26, 2024
Problem upload code: avrdude: ser_open(): can't set com-state for "\\.\COM3" Uploading	7	597	June 2, 2024

Avrdude: ser_open(): can't set com-state for "\\.\COM7"

Related topics