Avrdude: ser_open(): can't open device "\.\COM3":

Development Tools Uploading
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...and i have a similar problem with my R3 nano clone.
Also tried other bootloader. Can't change port because IDE does not detect a Arduino board. Only the standard blinking sketch with blinking L led but no connection to upload (and yes pc detects a device).
Sketch uses 2034 bytes (6%) of program storage space. Maximum is 30720 bytes.
Global variables use 188 bytes (9%) of dynamic memory, leaving 1860 bytes for local variables. Maximum is 2048 bytes.
avrdude: ser_open(): can't open device "\.\COM3": Het systeem kan het opgegeven bestand niet vinden.

Failed uploading: uploading error: exit status 1

I also have a normal size R3 and this one works perfect.

thx!

Sketches not uploading on Arduino Nano :(
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Your question has been split from an existing topic. Please do not hijack topics; especially if the error is different.

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There's a hint already there.

Here we go, shooting blindly in the forest hoping to hit a deer.

Now we're getting somewhere. You still believe in the bootloader being at fault, if you even can't upload anything?

You likely have a driver issue. What serial chip is present on your Nano clone?

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Now if i stick the Nano in the pc via usb no more blinking L led.
But: pc and IDE see there is a device connected but IDE can't upload sketch (sorry don't have pc with me to show error).
I removed the ch340 driver (i should be this one because the board is with the ch340 usb chip) ans installed the (older) friver from the Sparkfun website. No succes

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What does device manager say about it, when you plug it in? (A refresh of the view might be necessary)

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Device manager sees the 'ch340' device without errors

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Can this COM port be selected in the IDE too?

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Although i can set the right com port now (and select nano in IDE) the tx and rx led's don't start flickering when the IDE starts uploading sketch to board (it just keeps uploading without result).
I'll try some other stuff i read i could remedy the problem but i'm not at home now.
-removing ch340 driver without re install and plugging nano in so new driver get's installed automaticly
-try other USB cable
-plug board in to other usb port
-...
-buying a Sparkfun or Seeed Nano board :enraged_face:

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Never heard of anyone having success with the latest driver.

If Windows finds and detect, I don't think this is causing your problem.

You can always try, but see above. Using another computer would be more interesting.

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after using multiple COM ports (sometimes end up with thirty or forty COM ports) I find I have to uninstall the COM ports to make a device work

  1. open Device manager and expand Ports COM & LPT)

  2. click View > Show Hidden Devices – you get list such as

    image
    image296×239 31.5 KB

  3. right click on each COM port - click Uninstall Device – click Uninstall button

  4. when complete plug in your device and hopefully the COM port should appear

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Finaly solved.
Bit suspicious because the standard installed blink sketch did not work anymore (bootloader bricked?).
First tried other usb ports (and erasing).
Then other usb cable.
Then uninstalling and re-installing the ch340 driver (this time the widows/microsoft version) and aha...IDE recognizes port AND nano board automatically.
but...still won't upload sketch.
Then grabbed my uno and used it again as programmer and...voila, bootloader re-installed So this time it works. Cause???
Then tried uploading sketch in nano with success!
thx everybody! ...everything points at a faulty bootloader but it's a mystery why re-loading the bootloader did not work yesterday.

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