Hey everyone, recently I bought 3 Arduino Nano clones to play around, one of them works perfectly but the two others besides coming in a darker blue tone started blinking in the L led the moment I connected them even though I hadn´t written any code yet. I tried uploading the blinking sketch on them but this error message showed up. Sketch uses 934 bytes (3%) 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. avrdude: ser_open(): can't set com-state for "\.\COM6" Failed uploading: uploading error: exit status 1 I've already tried changing the port and the bootloader but nothing has fixed it.

The usual cause and solution for "can't set com-state..." errors can be found here: [image] Avrdude: ser_open(): can't set com-state for "\\.\COM5" Failed uploading: uploading error: exit status 1 Uploading Hi @teaoncup There were some previous reports of this "can't set com-state for ..." error occurring specifically when using boards that have the CH340 USB chip. It seems that a driver upgrade included in a recent Windows update is the cause of this problem. The affected users have found that uninstalling and reinstalling the CH340 device fixed the problem. I'll share the instructions you can follow to do that: Close Arduino IDE if it is running. Connect the Arduino board to your computer wi…

There are two boot loaders, you select them from the tools menu, First select Nano then try it. If it does not work try the old boot loader, that should work. The Nanos should be blinking before you load any code.

@assigned1231The LED blinked before you started uploading and does it still blink. When uploading the blink sketch change one of the times by a noticable amount and you will know if it uploaded for sure. Try a different cable. I have had problems with the Nano's with a USB-C interface. They were very cable sensitive. Just for grins try the UNO as a board.

Sketches not uploading on Arduino Nano :(

Official Hardware Nano Family Classic Nano

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Sketches not uploading on Arduino Nano :(

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