Hello all, I'm having a bit of trouble with the App Lab. I've been really trying to get the built-in Matrix on the Uno Q to write text, but the traditional way for the Arduino Uno R4 Wifi (Using ArduinoGraphics) isn't in the Sketch libraries. Is there an alternative for this?
this basic matrix demo compiles and works on my Q..
I did have to add the ArduinoGraphics library to the sketch inside of App Lab.
Looked through the included demo's in App Lab don't see one that prints text to the matrix..
good luck.. ~q
Hi @ts_king528.
I'm not sure I understand what you mean by this. Did you install the ArduinoGraphics library via the "Add Sketch Library" dialog in Arduino App Lab?:
https://docs.arduino.cc/software/app-lab/apps/develop-apps/#add-sketch-libraries
Was that recently, or some time ago?
I ask because it is true that the ArduinoGraphics library was not listed in the "Add Sketch Library" dialog some months ago, which meant it could only be used by manually editing the build profile in the sketch project file of the App (sketch/sketch.yaml). However, the problem with the metadata has since been fixed:
And that fix was released 2026-03-24:
Ever since that time, the ArduinoGraphics library should be listed in the "Add Sketch Library" dialog:
And so can be used in the sketch components of Apps via the standard approach.
Ah, I see. When you wrote "add the ArduinoGraphics library to the sketch inside of App Lab.", you meant adding an #include directive for the library to the sketch code.
That is indeed required. Additionally, the #include directive must be located before the #include directive for Arduino_LED_Matrix.h.
no, actually I did have to click "add sketch library" button, then search up the lib and add it..
i first tried compiling was half expecting it to work as I see the lib depends on it but it failed and complained..
I am running on a custom core, current main tag as of a few days ago..
It does compile and work..
I also tried <> for the include without the lib manually added..
~q
Yes, this is mandatory.