Arduino Leonardo Clone USB Port Not Detected

Development Tools IDE 1.x
1

Hi, I am trying to use an Arduino Leonardo clone for my simulation rig. I am trying to upload firmware to it, however my computer can't detect the device. Here are the things I have tried so far:

-Reinstalling IDE and all drivers

-Changing the cable I was using

-Burning a fresh bootloader using another arduino board

-Pressing the reset button twice (double reset)

-Switching computers to see if Windows 11 is the problem

-Manually adding legacy devices and selecting Arduino Leonardo

-Holding down reset button while plugging

After all these steps I am still unable to get any connection. Can you please help me fix this issue?

2

If your double tap the reset, does the on-board LED pulsate (fade in/out). If yes bootloader is OK.

Further check device manager. If it does not show anything, you're probably using a charge-only cable instead of a data/sync cable; yes, I know that you changed it, possibly for another charge-only cable :wink:

3

I am sure that the cable I am using is a data cable because I am using the same cable to run my 3D printer over klipper so no problems with the cable I am sure of it and after the double tap reset the led blinks. I have checked device manager and it still does not show anything.

4

I have even tried using a data only cable with the power line blocked and supplied power from another arduino using the 5 volt and gnd pins and the only port that appeared was the port of the clone arduino uno which is using an external usb chip (ch340)

5

'Leonardo' / clone and CH340.
I don't see those lines meshing.
Does it show up as anything in Device Manager?

6

You did not tell us about the LED fading in/out aftrt double tap reset.

Additional question: does Windows device manager show the board after a double tap reset? This should be while the LED is fading in/out.

7

The ch340 device is because there is another Arduino clone device (UNO) plugged into the computer what I was trying to say is that I have even tried giving power to the leonardo board by another arduino and used a data only usb cable to see if there was a problem with the power lines of the micro usb connector of the board.

8

Absolutely nothing not even a problematic device with a yellow error triangle (I think this is the case with most leonardo problems on the internet)

9

Still don't know if the LED fades in/out.

Did it ever work?

Check all the soldering on the board?

10

I have answered that question in the first reply. Yes it does blink.

11

Blinking and fading is not the same :wink:

Sounds like a bad board. As said, scrutinise all connections, especially around the USB.

12

It does fade in and out after double tap on reset and it blinks after a while. I have checked all solders and there is no visible problem there might be a problem with the solders underneath the Atmega32u4 and I don't have the tools to reball them I think the best option is to return. I think this is a faulty board and I will return it. I will update this topic after a replacement.

13

My replacement board arrived. It works flawlessly the solution was to get a new board.

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