An 8x8 LED matrix in red.

For the D1 mini ESP8266 and ESP32, go here:

Facts

8X8 LED Matrix (A panel)
Data and clock lines are fixed and cannot be set via solder bridges

Description	Name	GPIO
Tact	CLK	14
Data	DIN	D7

Schematic

Compatibility

D1 Type	Compatible	Reason if not
D1 mini	Yes
D1 mini Pro	Yes	Untested
D1 mini Lite	Yes	Untested
D1 32	Yes	Possibly D5 and D7 define problems
S2 mini	Yes	Untested
C3	Yes	Untested

Compatibility with D1 boards

Areas of application

Display of simple information
Demos like smileys

Views

Programming

Libraries

I used the library from the D1 help page and copied the .h and .cpp files into the project directory.

https://github.com/wemos/WEMOS_Matrix_LED_Shield_Arduino_Library

Arduino ESP32 Library V2.0.2

Arduino ESP8266 Library V3.0.2

Test programme

I once wrote my own program, but there are also two available on the manufacturer's help page.

Problems

Pins D7 and D5 unknown

When compiling for the D1 ESP32, I encountered the problem that the ports for D were not defined. I quickly defined these in the header file of the Wemos library.

Conclusion

Nice toy and easy introduction to LED matrices.

Other Shields

More ESPs

Sources

Sources for the Shield

Manufacturer's website

Sources for the boards