Unknown board reported, which core should I install?

[endorama]

Hello, I have a Arduino Nano 33 IoT, I attach it to the computer and it shows in the board list:

$ arduino-cli board list
Port         Type              Board Name FQBN
/dev/ttyACM1 Serial Port (USB) Unknown

I suspect this is due to a missing core. Core list:

arduino-cli core list
ID           Installed Latest Name                                        
arduino:avr  1.6.23    1.6.23 Arduino AVR Boards                          
arduino:samd 1.6.22    1.6.22 Arduino SAMD Boards (32-bits ARM Cortex-M0+)

I tried searching cores for nano, 33, iot, I installed the core found (arduino:avr) but still the board is unknown.

Which core should I install? How should I know the core to install?

Thank you!

[mastrolinux]

by reading VID and PID we should check in the vid:pid arduino API and propose to install the right core.
The arduino-cli should install at least the serial and the usb discoverer by default. The logic is already here:
https://github.com/arduino/arduino-cli/blob/master/arduino/cores/packagemanager/package_manager.go#L93
@endorama are you sure you attached a board with a proper boot loader?

[endorama]

@endorama are you sure you attached a board with a proper boot loader?

I would say yes, as I was able to flash on it the Blink sketch from Create Editor.

Create Editor does recognise it properly, performing this request:

$ curl 'https://builder.arduino.cc/v3/boards/byVidPid/0x2341/0x8057' -H 'Authorization: Bearer [REDACTED]'
{"architecture":"samd","fqbn":"arduino:samd:nano_33_iot","href":"/v3/boards/arduino:samd:nano_33_iot","id":"nano_33_iot","name":"Arduino NANO 33 IoT","package":"arduino","plan":"create-free"}

[endorama]

Upgrading to the latest samd core fixed this issue. Core index was outaded, so I missed the possible new version.

Use arduino-cli core update-index to get update core list.

After update I discovered a new samd version:

arduino-cli core list
ID           Installed Latest Name                                        
arduino:avr  1.6.23    1.6.23 Arduino AVR Boards                          
arduino:samd 1.6.22    1.8.3  Arduino SAMD Boards (32-bits ARM Cortex-M0+)

Trying to upgrade with arduino-cli core upgrade resulted in issue #273

Single core update did work (arduino-cli core upgrade arduino:samd)

With samd core 1.8.3 the board is properly recognised:

$ arduino-cli board list
Port         Type              Board Name          FQBN                    
/dev/ttyACM0 Serial Port (USB) Arduino NANO 33 IoT arduino:samd:nano_33_iot

Searching for 33 now yield proper result:

$ arduino-cli core search 33
Searching for platforms matching '33'
ID           Version Name                                        
arduino:samd 1.8.3   Arduino SAMD Boards (32-bits ARM Cortex-M0+)

This issue is resolved, but I think we should improve this interaction. Probably a line suggesting to perform update-index may be enough (I did not read the entire getting started in the main README, but went directly for step 4, while this information was in step 3)