Remote control is convenient, but a garage door is a moving physical barrier and a security boundary. A command without reliable position feedback is not enough.
Automationplanned
Garage door automation, with boring safety first
Exploring relay control and state sensing for a roller door without publishing a blueprint for defeating the physical security around it.
Use suitable isolated control hardware, independent open and closed state sensing, conservative automation rules and explicit failure handling. Keep regulated electrical and door-safety work with appropriate specialists.
This project is in design. No installation or successful operational result is claimed yet; hardware suitability, obstruction safety and trustworthy state feedback must be resolved first.
Abstract architecture / sensitive detail removed
01 Authorised request
02 Safety conditions
03 Isolated relay
04 Door controller
05 Independent state feedback
State before remote control
The important signal is not “the relay fired.” It is whether the door is securely closed, clearly open or in an unexpected state. Independent sensing makes that distinction visible without disclosing placement or physical security details.
Safety boundary
Any implementation must preserve the door manufacturer’s safety mechanisms and use hardware appropriate to the controller. This is an engineering design note, not installation guidance for mains wiring or security systems.
Notes to future me
What this project is teaching me.
- Never infer physical position solely from the last command.
- Convenience must not quietly weaken a security boundary.
- Some failure modes need a person, not another automation.
This page explains design intent and lessons without publishing credentials, private addressing, access paths, device identifiers or a complete security topology.