Serial Port not available

Using Arduino IDE 1.x
1

Hello everyone,
I use an Apple MacBook (M1), unfortunately, I updated Ventura 13.6 and the serial port is no longer recognized... It worked without problem before this update. Any idea for a solution?

THANKS

2

Hi @lesd33. Please try this troubleshooting procedure and then report your results in a reply on this forum thread:

:exclamation: This procedure is not intended to solve the problem. The purpose is to gather more information.

  1. Unplug the USB cable of your Arduino board from your computer if it is currently connected.
  2. Click the Apple logo on the left side of the menu bar at the top of the screen ("Apple menu").
  3. Select "System Settings..." from the menu.
  4. A "System Settings" window will open. Click "General" in the menu on the left side of the window.
    ⓘ You may need to scroll the menu down to see "General".
  5. Click "About" on the panel at the right side of the "System Settings" window.
  6. The "About" panel will open. Click the "System Report..." button at the bottom of the panel.
  7. The "System Information" window will now open. Select Hardware > USB from the tree on the left side of the window.
  8. Take note of the contents of the "USB Device Tree" panel of the "System Information" window.
  9. Connect the Arduino board to your computer with a USB cable.
  10. Select File > Refresh Information from the menu bar.

Do you see any new device appear in the "USB Device Tree" panel of the "System Information" window after doing the last step?

3

Hi,

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I had already done all these manipulations. I also reinstalled CR340. The serial port is not displayed. I read a procedure that does not work (for me) with the latest Apple Update.
https://discussions.apple.com/thread/254867571

Regards

4

Am I correct to interpret your reply as indicating that you did not see any new device appear in the "USB Device Tree " panel of the "System Information " window after doing the last step?

This information is valuable because if the device doesn't appear there it tells us the problem of the missing port is at the operating system level. That means we can exclude Arduino IDE as the source of the problem (since in that case we would still see the device in the macOS System Information).

Do you mean you installed a driver for the CH340 chip? macOS should support the CH340 by default so no driver installation should be necessary (and this is also my personal experience). I remember even seeing some reports from users (though years ago) that installing a CH340 driver actually caused the macOS to no longer recognize the port of their CH340 Arduino board. So you might try uninstalling that thing you installed if possible to see if that might fix the problem.

Does your Arduino board have a CH340 USB chip?

5

" Am I correct to interpret your reply as indicating that you did not see any new device appear in the "USB Device Tree " panel of the "System Information " window after doing the last step?" --> YES

I uninstalled, nothing changed...
I use a real arduino UNO-R3, I don't know
In any case, I was programming without any serial port issues before this update... strange :thinking:

6

OK. This board does not use a CH340 USB chip so it is certain you don't need to install the CH340 driver. You don't need to install any driver at all on macOS to get a serial port from the real Arduino UNO R3 board.

I also updated my macOS machine to Ventura 13.6 yesterday. I checked and the serial port of my real UNO R3 board is recognized in the "USB Device Tree " panel of the "System Information " window as expected. So it isn't some universal problem in macOS 13.6.

Make sure the USB cable is completely plugged into both the Arduino board and the PC.

If that doesn't help, you may have a damaged/defective or charge-only USB cable. Try a different cable.

Either of the above can result in the power connections being made (and thus LEDs lit on the board), but no data connections (and thus no port for the board).

1 Like
7

What version of the IDE are you using?

Have you tried to connect some device other than your Arduino to the USB port to make sure it is detected? If possible with the same cable (such as a printer)

8

Hi all,

I tried with several different cables (printer) and several USB hubs, without success. So I went to my son's gaming PC and everything works perfectly. So I'm going to program on PC and try again later on my Mac laptop.
In any case, thank you for your help, I will keep you informed when the connection works again.

Regards
Lesd33

9

Sorry I spoke too soon.
The On LED on the Arduino lights up well on PC but the Arduino does not communicate with USB. So I'm going to order another arduino uno because I guess there is a problem with mine. I will keep you informed

10

I have managed to damage the serial interface of more than one Arduino.

Usually an Arduino with a damaged serial port can still be programmed and used using a second Arduino via ICSP.

Don't throw away the old one!

11

I just received the Arduino Uno 4 Wifi today !
Everything works perfectly.

Many thanks you for your help.

Lesd33

Is there is a procedure for using (downloading) ICSP ?

12

This article was written well before Arduino 4 came out, which I am no familiar with.

It should help, though.
http://www.gammon.com.au/bootloader

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