New Nano v3 - can't find com port.

Development Tools IDE 1.x
1

I just got an Arduino Nano v3 off of ebay.
However, when connected to my mac, I am not able to choose com port. Only Bluetooth and iPhone com ports are available.
When plugging in my Uno R3, I can choose the com port just fine.

What could be wrong?

2

I have exactly this problem. I get the same result on my iMac under Lion and on my Apple laptop under Snow Leopard. I also have no problem connecting to Uno R3 boards. The Nano I'm trying to upload to is a v3.1 that I just bought through Amazon. It's the only Nano I've tried. I've tried two USB cables. Same result with both.

Thanks in advance.

Liam

3

The Nano uses an FTDI chip for serial communication. You will need to install the FTDI drivers to communicate with it.
These are not the same drivers that are used by the UNO.

You can get the latest FTDI VCP drivers here: http://www.ftdichip.com/Drivers/VCP.htm

4

Thank you Louis. It works as expected.

Liam

5

Wow - Thanks for the help Louis!

I was having the same problem with a new Nano I just got. I have a MAC and just started with Arduino. I have had good success with the Uno, and bought a Nano to play with. When I couldn't load a sketch I was all over the forums till I found this solution. This solved my problem. Just wanted to thank you two years after your post!

Paul

6

For the next person who is reading this thread and still having trouble connecting to your $3 ebay nano, you may need a different driver for the CH341G Serial/USB Chip.

This worked for me:

7

drosenstein:
For the next person who is reading this thread and still having trouble connecting to your $3 ebay nano, you may need a different driver for the CH341G Serial/USB Chip.

This worked for me:
How To Use Arduino Nano Mini Pro With CH340G On Mac Osx Yosemite

WOW!!! All else failed - your link to the chip driver worked. Thank you for taking the time to post!

8

drosenstein:
For the next person who is reading this thread and still having trouble connecting to your $3 ebay nano, you may need a different driver for the CH341G Serial/USB Chip.

This worked for me:
How To Use Arduino Nano Mini Pro With CH340G On Mac Osx Yosemite

Thank you! This is perfect.

9

I have a Nano clone which I have loaded several different sketches to, using the IDE. I wanted to try the Create Arduino web service as well. So I opened some sketches that had been previously successfully loaded on the Nano clone. In each, I selected the Nano and the ATMEGA328P (Old Bootloader) as required for a lot of clones. This was the same selection I had used in the IDE. However, There was no port to select. It was COM8 in Device Manager and the same as used in the IDE. I also tried with the current ATMEGA328P Bootloader and still had no port to select. I also rebooted the WIN 7 32 PC with no improvement. I also tried updating the CH340 serial driver.

In summary, the board works with the IDE but not the web service.

Any ideas?

10

Driver update is working also for me,

plus I had also to change the Processor from “ATmego328P” to “ATmego328P (Old Bootloader)”

11

The clone Nano board use CH340 chip to communicate with PC which will draw more current than the official board. If the PC can not provide sufficient current to the board, it stop functioning even the correct driver is installed. Put the Nano board onto a Nano shield with additional power connected to the shield. It will solve a lot of debug time because you never know when you are running out of juice as the project getting more complicate in the future,

12

chenry1688:
The clone Nano board use CH340 chip to communicate with PC which will draw more current than the official board. If the PC can not provide sufficient current to the board, it stop functioning even the correct driver is installed. Put the Nano board onto a Nano shield with additional power connected to the shield. It will solve a lot of debug time because you never know when you are running out of juice as the project getting more complicate in the future,

A PC can deliver 500 mA; that should be plenty for a bare Nano regardless of USB-to-TTL converter. I've never had a power issue with my CH340 clones unless I started drawing too much current with external devices from the 5V pin.