Hello
Just received the Uno R4 WiFi
Trying to have a play with the LED matrix, the compiler tells me the library isn't loaded.
It's not in the list of included libraries, it's not included in the library updates.
There's no link to it on the programming example page.
There's is no link to the library anywhere that I can find.
Thanks for any points in the right direction.
Cheers
1 Like
I've been there, there is no link to the library.
I've been here and copy pasted the examples, same result and no link to the library!?
Using the Arduino UNO R4 WiFi LED Matrix | Arduino Documentation
I believe that if you have followed the instructions at the link @juraj provided, and have installed the board package for the Arduino Uno R4 Boards, you will find that the Arduino_LED_Matrix library is but one of many board specific libraries that are installed with the R4 board package, all of which will be found under Examples -> Examples for Arduino Uno R4 Wifi. Specifically, the LED matrix library will be found under Examples -> Examples for Arduino Uno R4 Wifi -> Led matrix.
The libraries installed with the R4 core are speicific to the R4 boards, and will only be available when you have selected an R4 board in the IDE. If you are, for example, attempting to compile for an R3 board, the library will not be found, as it is only available for R4 boards.
Solved - Go to to Board Manager and type in 'R4' and install the Ardunio Uno R4 Wifi option.
Nothing like that advised anywhere just advised to download the IDE 2.2.1 !!!
Well down to coding.
That turns out not to be the case.
At the link @juraj gave you, the step right after "Download & Install IDE" was "Install Board Package".
This snag just caught me out, too. An additional sentence to make that perfectly clear would have been ideal in the documentation. It's easy to overlook/forget that the R4 is not an AVR architecture and is thus not truly a revision to the R3 if one takes the R in Rx to mean "revision".
It almost seems more like an update to the Due (Arm Cortex M3) so yeah, I'll chime in that it's a little confusing.
Thank heavens for the forum though!