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Topic: Arduino IDE not connecting serial port for Arduino Uno Rev R3 (Read 7230 times) previous topic - next topic


The computer on my Chrome OS is running the Arduino IDE app and it won't recognize the serial port on both the app and the online editor. Also, when I plug in the USB cable into the Arduino board, the on light turns on and turns off after 2 seconds. Is this normal? Lastly, are there any solutions to this problem?


Hello spencerkim.

Thank you for sharing your issue with the Arduino community.

I would suggest you try the following:

- Try a different USB cable ensuring it is a data cable.
- Make sure the you plug in the cable directly onto a USB port 2.0 (do not use USN hub)
- Try a different computer and check if you obtain the same result
- Perform a loop-back test following these instructions to determine if the serial communication of the board works:

If none of the previous steps solve the problem contact Arduino Technical Support to inspect a possible faulty board.
┗(•ˇ_ˇ•)―→ Member of the Ardunio customer service team
( ━☞´◔‿ゝ◔`)━☞ Contact us through https://bit.ly/2xxu1le

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