https://vdparts.de/20240926-lcd-optrex-DMC40457-40x4-char-with-led-backlight-new-other/detail-index.html
optrex lcd DMC40457 40x4 char DMC 40457 HD44780 controller LED backlight
programmable controllers and related modules - programmierbare steuerungen und zusaetzliche Module
controller ledoptrexlcdchar