Ubuntu – No ttyACM0 for Arduino Nano on Ubuntu. How to attach it

arduinoarmmodprobeserial portusb

On my Firefly-RK3399 (arm arch) I have installed their official ubuntu image for the board. I also installed Arduino IDE and when I connect my Arduino UNO then all fine, I can flash it and I see in my serialports (Arduino IDE):

/dev/ttyACM0

However, when I do this with the Arduino Nano…nothing. Arduino IDE does not see it and I can not flash it.

I already saw a lot of forum posts today. I tried all out but unfortunately nothing worked for me so far.

When I run:

dmesg -w

then I plug in Arduino UNO, then Arduino NANO…then I get the following at the end of the console:

[ 1915.205439] usb 1-1.4: new full-speed USB device number 8 using
ehci-platform [ 1915.294646] usb 1-1.4: New USB device found,
idVendor=2341, idProduct=0043 [ 1915.294663] usb 1-1.4: New USB device
strings: Mfr=1, Product=2, SerialNumber=220 [ 1915.294671] usb 1-1.4:
Manufacturer: Arduino (www.arduino.cc) [ 1915.294678] usb 1-1.4:
SerialNumber: 85435333131351104190 [ 1915.296502] cdc_acm 1-1.4:1.0:
ttyACM0: USB ACM device

[ 1934.279563] usb 3-1: new full-speed USB device number 2 using
xhci-hcd [ 1934.393985] usb 3-1: New USB device found, idVendor=1a86,
idProduct=7523 [ 1934.394001] usb 3-1: New USB device strings: Mfr=0,
Product=2, SerialNumber=0 [ 1934.394009] usb 3-1: Product:
USB2.0-Serial

So the Arduino Nano does not get attached to any ttyACM*

How can I do this?

Best Answer

I was able to find the Nano with the CH340 chip (or CH340G, the Amazon item wasn't clear) on Ubuntu 18.04 just by installing the Arduino IDE (1.8.x) and giving myself permissions to the port with:

sudo usermod -a -G dialout <my linux username>    

Then I was able to see the /dev/ttyUSB0 port in the Arduino IDE (it isn't ttyACM0 like in the documentation). You can find out what port it is by unplugging your Nano, then running:

ls -l /dev/tty*    

Then plug your Nano back in and run it again and compare the list. The new device should be at the bottom of the second list.
I was able to upload a sketch by changing the processor from ATmega328p to the Old Bootloader.