Arduino IDE doesn't see my arduino nano

Projects General Guidance
1

Hi, I need your help! I have 2 Arduino Nano Every boards. I connected NRF24 module to the first board, uploaded my sketch and everything worked fine:

photo_2025-04-28_21-09-45
photo_2025-04-28_21-09-45958×1280 111 KB

But for some reason, Arduino IDE doesn't see my second board even if I use the same port:

photo_2025-04-28_21-09-37
photo_2025-04-28_21-09-37958×1280 125 KB

When I switched back to the first board - everything worked fine again.
Also I noticed that these two orange lights are turned on on the second board:

photo_2025-04-28_21-09-42
photo_2025-04-28_21-09-421280×958 120 KB

and I don't know if that means anything but I left my second arduino board plugged into my laptop for about an hour and when I tried to touch it it was extremely hot.

Is there something wrong with Arduino module itself? Thank you in advance!

2

No, there's probably something wrong with your connections, but without a schematic, we won't be able to tell.

3

I moved your topic to an appropriate forum category @pastt0r.

In the future, when creating a topic please take some time to pick the forum category that best suits the subject of your topic. There is an "About the _____ category" topic at the top of each category that explains its purpose.

This is an important part of responsible forum usage, as explained in the "How to get the best out of this forum" guide. The guide contains a lot of other useful information. Please read it.

Thanks in advance for your cooperation.

4

second board to 9V battery:
VIN-> toggle switch -> 9V
GND -> GND

second board to NRF24:
GND -> GND
3.3V -> VCC
D9 -> CE
D10 -> CSN
D13 -> SCK
D11 -> MOSI
D12 -> MISO

5

disconnected battery and switch but nothing has changed

6

You can't run 2 Arduinos boards in one IDE window. Try opening a second IDE window for the second Arduino Nano.

7

I tried it but nothing changed.

8

I noticed that the second board starts getting hot soonly after I connect it to the laptop

9

It sounds like a bad card. Where did You buy it?

10

Did You make sure they use different USB ports?

11
  1. What did get extremely hot?
  2. Did you test the board before you soldered the wires to it?
  3. Make sure that you don't have caused any shorts with the soldering.

Disconnect everything except for USB and check.

1 Like
12

Your board is probably dead by now .

As said , You should try connecting just the bare board via USB . It will probably be on a different port .
If it got hot then there is a fault or a previous fault has damaged it .

When starting project Always test the bare board first will a simple sketch , then you will know if it works ok.
Most destroyed Arduino are caused by wiring errors or short.
Your board is probably dead by now .

As said , You should try connecting just the bare board via USB . It will probably be on a different port .
If it got hot then there is a fault or a previous fault has damaged it .

A good tip : When starting project Always test the bare board first with a simple sketch , then you will know if it works ok.
Try and stick with wiring using the same colour scheme - you have black as 0v from the battery then colours change - easy to then destroy a board with the wrong connection.
Most destroyed Arduino are caused by wiring errors or shorts