Flat Skylight Control

The flat skylight control board was developed as a replacement for an existing controller that consumed too much power for solar applications. The board manages opening and closing flat skylights via the motors and suits both mains-powered and battery-driven installations — with one uniform design for simple assembly and inventory management.

The hardware is built around an STM32 microcontroller with a 12 V input, internal boost to 24 V for the motors and separate low-voltage rails for logic and RF. Up to three motors can be driven in parallel. A rain sensor automatically closes the skylight when it rains, while battery monitoring prevents deep discharge. Per motor channel, a current sensor detects overload, blockages and skew.

Operation is possible via 433 MHz remote control, local panel buttons or fully automatic safety logic. After inactivity the board enters a deep sleep state with low power draw. DIP switches configure the number of motors and the sensitivity of current monitoring. Buzzer and status LED provide immediate feedback during operation and fault conditions.

IMeTech delivered the full trajectory: from specification and PCB design to firmware, production files and handover including datasheet and installation guide. The result is a compact, energy-efficient controller that works reliably in the field and is straightforward to install and maintain.