Hi all, I've just recived my Arduino Uno, i plugged it in my Pc (Win 7), and when I try to upload something this is what i get: Binary sketch size: 1026 bytes (of a 32256 byte maximum) avrdude: ser_open(): can't set com-state for "\\.\COM17" I tried to change the COM port but it won't work... Th…

Seems to my that your correct port is COM10, have you tried that? Cheers, Kari

maxidvd: yes of course... Yes of course... "Yes, you have tried" or "Yes of course, I should have tried that and it works"? Cheers, Kari

I tried and it didn't work...:slight_smile:

Ok. Then I must apologise, I cannot help more. Does it work with another computer? If the same problem exists, then your Arduino is probably broken. Oh, I read the first post again, problem lies in your Windows. Drivers are ok? Kari

Without knowing what sofware and virtual com-port drivers are installed in your Windows, it's hard to guess, what is going on. Bluetooth drivers can be one, but it doesn't explain, why COM10 don't work when connected. Kari

Hi, I faced exactly the same troubles on my Arduino UNO, and went through reboot (multiple times...) driver re-installation Arduino application re-installation.... change the micro-controller And finally bought a new Arduino UNO and it worked again immediately. I don't know if we'll find how to…

i am able to fix this problem very easily... just press reset button on arduino and unplug from usb and go to the arduino software installation directory (c:/program files/ arduino) and open drivers folder and open dpinst-amd64 by double clicking on it and just install that if it not runs may be yo…

Upload error: avrdude: ser_open(): can't set com-state for "\\.\COM17"

Development Tools Uploading

system March 11, 2011, 4:33pm 19

yes it works an my asus netbook as i said before
yes, the seems to be ok

Topic		Replies	Views
Upload fails: 'avrdude: ser_open(): can't open device "\.\COM9"' Uploading	18	357	November 16, 2025
Avrdude: ser_open(): can't set com-state for "\\.\COM3" Failed uploading: uploading error: exit status 1 IDE 2.x	39	29355	September 22, 2024
Avrdude: ser_open(): can't set com-state for "\\.\COM5" IDE 1.x	22	11192	May 31, 2024
Port monitor error: command 'open' failed: Invalid serial port. Could not connect to COM serial port Uploading	64	68726	February 4, 2026
Avrdude: ser_open(): can't set com-state for "\\.\COM7" Uploading	20	26504	April 11, 2024

Upload error: avrdude: ser_open(): can't set com-state for "\\.\COM17"

Related topics