When I try to upload my sketch to Arduino Nano using a USB serial converter, the IDE gives following error:
avrdude: ser_open(): can't open device "\.\COM6": Access is denied.
The Tx and Rx leds on usb-serial converter blink continously but nothing happens on nano.
I already checked the com port, board, programmer and processor.
Could somebody suggest me a solution.
NANO's dont normally need a usb serial convertor.
Is the USB on the NANO broken ?
If so HOW ?
Which CONVERTOR as there are a few variations ?
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It will help you get the very best out of the forum in the future.
- Mention if you are using AI generated code it is important information.
- Your OS and version can be valuable information, please include it along with extra security you are using. Antivirus etc.
- Always list the version of the IDE you are using and the board version if applicable.
- Use quote or CODE tags to add error messages as an attachment NOT a picture.
- How to insert an image into your post. ( Thanks sterretje )
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- Remember that the people trying to help cannot see your problem so give as much information as you can.
- Ensure you have FULLY inserted the USB cables.
- Check you have a COMMON GROUND where required. ( Thanks Perry)
- Where possible use USB 2.0 ports or a USB 2.0 POWERED HUB to rule out USB 3.0 issues.
- Try other computers where possible.
- Try other USB leads where possible.
- You may not have the correct driver installed. CH340/341 or CP2102 or FT232 VCP Drivers - FTDI
- There may be a problem with the board check or remove your wiring first.
- Remove any items connected to pins 0 and 1.
- Close any other serial programs before opening the IDE.
- Ensure you turn off any additional security / antivirus just to test.
- There may be a problem with the PC try RESTARTING it.
- You may be selecting the wrong COM port.
- Avoid cloud/network based installations where possible OR ensure your Network/Cloud software is RUNNING.
- Clear your browsers CACHE.
- Close the IDE before using any other serial programs.
- Preferably install IDE’s as ADMINISTRATOR or your OS equivalent
ARDUINO SPECIFIC BOARDS
- CH340/341 based clones do not report useful information to the “get board info” button.
- NANO (Old Types) some require you to use the OLD BOOTLOADER option.
- NANO (ALL Types) See the specific sections lower in the forum.
- NANO (NEW Types) Install your board CORE’s.
- Unless using EXTERNAL PROGRAMMERS please leave the IDE selection at default “AVRISP mkII”.
- Boards using a MICRO USB connector need a cable that is both DATA and CHARGE. Many are CHARGE ONLY.
CREATE editor install locations.
- On macOs ~/Applications/ArduinoCreateAgent-1.1/ArduinoCreateAgent.app/Contents/MacOS/config.ini
- On Linux ~/ArduinoCreateAgent-1.1/config.ini
- On Windows C:\Users[your user]\AppData\Roaming\ArduinoCreateAgent-1.1
Performing the above actions may help resolve your problem without further help.
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Thanks to all those who helped and added to this list.