My 2 new Arduini Nano ESP32 will not connect

Official Hardware Nano Family Nano ESP32
1

I have just bought 2 new original Arduino Nano ESP32s. When I connect them to my MacBook (or Windows Laptop), they are not recognised.
I have both ESP32 boards loaded via the boards manager.
I have unplugged/plugged many times, I have restarted my computers as well as the IDE various times.
The boards LEDs flash: yellow/green then yellow/red then blue .
Any ideas guys??

4

Go to here Nano-esp 32

Then click on the getting started button. This will tell you what to do.

Then go back to that page for lots more information, schematics pinout and such.

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5

Thanks, did that

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Also, interestingly, when I logon to the Arduino Cloud and try to connect a new device, it cannot find these boards.

7

Hi @herriki. 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).

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And what happened when you tried to load and compile a sketch? I tried Examples->ESP->chipID

This would not work with my old Mac Book running macOS Mojave V 10.14.6. I found a thread saying that it needed at least V10.15.x, so I switched to my iMac running macOS Sonoma V 14.2

After changing the board definition to ESP Arduino (Arduino) it would compile although it being slow. This showed no errors so I uploaded it. It showed it had uploaded the code.

However, I needed to open the serial monitor window to see the results so I clicked on the magnifying glass and it reported:-
"Board at /dev/cu/usbmodem24201 is not available"

So I then went to the menu Tools->Port and selected the port that said (Arduino Nano ESP32) and then it worked printing out the chip ID every three seconds.

I did all this using the Arduino 1.8.19 IDE.

9

Thanks guys.
I seem to have some success this morning.
I used the second port on my MacBook and hey presto it recognised the new boards.

Strangly, after loading the blink sketch, I went back to the first port and it then worked as well.

Weird!

I now have a second problem (which I will post in another section) my Arduino Lab will not load.

10

It's not a Mac problem or an IDE problem, the board has dual processors and you have to 'put it in the right mode' When I got mine I saw that in the docs and had no issues.