Sometimes you want to cascade several LED dot matrix display modules. If you have LED dot matrix display with the MAX7219 driver, it provides DIN and DOUT pins. These pins are used to cascade our LED dot matrix display.

For instance, we have two 8 x 8 LED dot matrix display modules. The first module is attached to Raspberry Pi as usual. For the second module, connect DIN to DOUT from the first module. The CS and CLK pins from the first module are connected to the CS and CLK pins from the second module.

Please note that if you cascade two 8 x 8 LED dot matrix display modules, the (0, 0) position is located on the second LED dot matrix module. The following is the wiring for two cascaded LED dot matrix modules: