R4 WFI UBUNTU: Serial port dropdown menu is greyed-out

Development Tools IDE 1.x
1

Ubuntu 22.04
IDE 2.2.1
UNO R4 WiFi Board

Serial port is greyed-out. My board apparently is not being recognized. Have any of you guys have experienced something similar? How did you solve it?

Thanks

2

even it it would work, you would start with firmware update. so try that.
on the esp32 header wire io 0 to ground, then use esptool to write the firmware.
the bin is here
https://github.com/arduino/uno-r4-wifi-usb-bridge/releases/tag/0.3.0

the command is
esptool.py write_flash 0 UNOR4-WIFI-S3-0.3.0.bin

3

Thanks for the suggestion Juraj. But the board is not detected. The following message appeared:

esptool.py write_flash 0 UNOR4-WIFI-S3-0.3.0-rc1.bin
esptool.py v4.6.2
Found 0 serial ports

A fatal error occurred: Could not connect to an Espressif device on any of the 0 available serial ports.

4

Try different USB cables until one works. Or try different USB ports. With USB hub or without hub. Do any lights on the board turn on when plugged into a USB port?

At the Linux terminal command line run lsusb. With a good cable the R4 WiFi should show up like this.

Bus 001 Device 037: ID 2341:006d Arduino SA UNO R4 WiFi

You should also search this forum for other linux serial issues.

The following will not help until the board shows up in the output of lsusb. arduino-1.8.19-linux64.tar.xz includes a file named arduino-linux-setup.sh. Running this will install udev rules, fix permissions, and remove a troublesome program. This will not help until the board shows up in the output of lsusb.

5

even when io 0 on the esp32 header is wired to ground?

then use common USB troubleshooting.

6

Hi! THe lights and the heart appear when connecting it.. I have tried everything and my board still unshown. I have tried my R3 and everything went ok. lsusb shows nothing with R4 :frowning:
I will try to do the upgrade part in another computer (Maybe with windows)

7

Yeap.. I did the wiring and still nothing. R3 works ok in the same port.

8

and the cable is OK?

9

How many different USB type C cables have you tried with the R4? There are USB cables with power and ground wires but no data wires which will produce the symptoms you describe.

10

You were right... After changing the cable the board what detected... after that I run arduino-linux-setup.sh. and then I updated the firmware.. Now everything runs ok. Thanks!

11

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