The 8x13 blue LED matrix is also an example of using PWM to implement gray-level images. The LEDs are connected in a row/column layout in the form of a tree – the first row has one LED pair, the ...
You can get a long way just using the matrix library, but there is another library, ArduinoGraphics, that has additional functions that make the LED matrix really useful. However, at the time of ...
M5Stack's new Core Matrix packs 256 LEDs, Wi-Fi 6, motion sensing, and an ESP32-C61 into a tiny $30 IoT development kit.