ESP8266 Roller Blinds case

Case for ESP8266 controlled motorized roller blinds. Blinds can be controlled with web page or with Home Assistant via MQTT.
Video of three roller blinds controlled simultanously via Home Assistant: https://www.youtube.com/watch?v=Hl1eF2ebRR0

Purpose of this project was to build reliable, quite cheap and easy to build motorized blinds. The blinds feature a limit switch for automatic calibration, preventing glitches even during power outages. To avoid dealing with batteries, I chose a 12V input voltage since 1A and 2A switching power supplies are highly affordable and widely available. To maximize energy efficiency, the hardware and software are optimized so that three daisy-chained curtains draw less than 1W combined while idling on a single 2A power supply.

First I tried to run blinds without gearbox so that motor was attached directly to roller blinds. It was working fine, but when power was turned off, then the curtain would lower itself because there wasn't enought braking versu