Module Entrées/Sorties analogiques STR-3221-R1

DIN-rail stair lighting controller for Home Assistant and ESPHome. Thirty-two low-side MOSFET channels rated 1.5 A each drive one 12 or 24 V LED step per channel, each individually dimmable with 8-bit brightness on Modbus holding registers 400-431, and two presence-sensor inputs detect direction of travel. Modbus RTU slave on RS-485, configured over USB-C from a browser. The step sequence is written on the controller.