Controller for Velleman MML24XX LED message boards and MMLXXX/RC IR remotes. The Velleman MML24R is probabily manufactured by Ampuls (AM03128-H11)
This project was made to control a Velleman/Amplus MML24R/AM03128-H11 emulating its IR remote.
You can read keys from the original IR remote, send keys to the message board, send text with
.println() and so on.