Just got a new WIndows 11 Pro PC (a Dell XPS). No COM ports are available when I go to select the board and port. How do add one? I realize there is no physical serial port - that somehow a USB port is acting as one. THank you.
Welcome to the forum
Which Arduino board are you using ?
Does Windows recognise it when it is plugged in ?
Have you installed the drivers for the board ?
Also are you sure you have a data cable and not just a charging cable?
You do know that the board has to be plugged in before you can see the port, right?
if you run the Windows Device Manager it will display connected COM ports
as you unplug/plug the Arduino USB cable the device should disappear/appear
This way:
Less expensive options are available but FTDI is a standard and CP2102 is another:
Amazon.com: HiLetgo CP2102 USB 2.0 to TTL Module Serial Converter Adapter Module USB to TTL Downloader with Jumper Wires : Electronics
Update - I see a Com port but still have a problem.
In Device Manager, under Ports (COM & LPT) I see the Arduino Uno (COM7) port. However, there is an yellow triangle with exclamation point triangle icon next to it. Its properties Device status: This device cannot start. (Code 10). The specified request is not a valid operation for the target device.
It is the usbser.sys driver version 10.0.22621. When I try to update, the message is "The best drivers for your device are already installed."
I am using an Arduino Uno. I do know that the cable must be plugged in before using and that I choose the board and the port first.
This is the Error :
avrdude: ser_open(): can't open device "\.\COM7": The system cannot find the file specified.
Failed uploading: uploading error: exit status 1
I've done this before on my previous computer. This is a new computer. Thank you.
when I had similar problems I cleared the COM ports from the device manager
- unplug Arduino USB cabless etc
- start device manager
- click View>Show hidden devices
- Click on Ports (COM & LPT) to get a list of ports
5.right click on each COM device in turn > click uninstal device > click uninstal
hopefully when you now plug in the UNO the COM port should now appear without the yellow triangle
Clone, or genuine?
Thnaks. I followed these directions. When I plug in the UNO the COM port does not appear. I manually add it. My old machine had a USB port (type A I think). My new on only has Thunderbold/C. Using Arduino IDE 2.03. I am getting this error.
"C:\Users\xer09\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/bin/avrdude" "-CC:\Users\xer09\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf" -v -V -patmega328p -carduino "-PCOM3" -b115200 -D "-Uflash:w:C:\Users\xer09\AppData\Local\Temp\arduino-sketch-DD84C5DF37E6989D920E3AD43A80D368/blank.ino.ino.hex:i"
avrdude: Version 6.3-20190619
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "C:\Users\xer09\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf"
Using Port : COM3
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: ser_open(): can't open device "\.\COM3": The system cannot find the file specified.
avrdude done. Thank you.
Failed uploading: uploading error: exit status 1
Clone devices sometimes have unsupported USB to serial adapters. Please answer the question.
I am running Windows 10 - in the device manager all the UNOs I have show the following device driver details
are you sure it is a UNO? could you give a link to the original board details
Good question. It is a Keyestudio version of the UNO. I think I've resolved the issue. The short story is that I updated the CP2102 USB to UART Bridge Controller driver using this:
The long story is that I tried a different UNO (Elegoo Uno R3). And it worked and 'created' a different COM port. I could upload a sketch to the Elegoo but not the Keyestudio. I noticed the CP2102 USB to UART Bridge Controller also displayed a caution icon. So I updated that and the problem has resolved. Thank you for your help.
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