I just connected my Arduino Uno to Arduino Cloud but it does not work. I tried changing the usb ports, cables and double pressed the reset button eventough device agent recognizes it it just doesn't work.
You must provide supporting information, other wise, I must assume you did not apply power to your computer because it was not plugged into a power socket... as with the solution to thousands of other tech support issues.
How do you verify you connected your Arduino to the Arduino Cloud?
How do you determine "it does not work."?
Changing ports only changes the Device Manager and then the agent connecting to your hardware. Were these changes successful?
Did you verify your USB cable is for DATA and not just a phone-charging cable?
Have you tried using the Arduino IDE to upload a sketch to the Uno?
Your topic has been moved to a more suitable category on the forum.
Yes, I also tested it on the Arduino IDE but I'm using the same cable that used to work on my Windows PC but right now I'm using Linux Mint. Is it because of a different operating system?
Operating system does not matter.
What errors do you see when you compile the sketch in the Linux system?
What errors do you see when you upload the sketch in the Linux system?
It's just not working on the Cloud Editor, IDE just works fine and the error I see is Unknown Board when I click on it. It says "Could not connect to the board is it used by an another program?" eventough the IDE is never opened
I assume this is the cloud editor. Do you need to register each board with the cloud editor?
Yes, I have to register but the cloud agent can read the chipset and show it on the cloud editor but my Uno is said that its an "unknown board" and I cant get to register the board because it gives an error.
Does registering the Uno require Create Agent to be running? https://docs.arduino.cc/learn/starting-guide/the-arduino-web-editor/
Which UNO are you trying to connect? The UNO Q or the UNO R4 WiFi?
Or perhaps even the UNO R2?
If the Arduino IDE can connect to and upload to the board, then the cloud agent agent should work with it also.