This article details the design of a secure control interface that uses the Zigbee protocol to control a Marantec garage door opener. We will see how to flash an E18 module (CC2530) using a SmartRF04 programmer to create a galvanically isolated actuator (ILS relay). The unique aspect lies in the software integration: the use of a Garmin Fenix 8 watch via a Home Assistant server. A comprehensive project combining hardware, software, and modern home automation.