Explore the journey of creating a smart home automation system in this 30-minute Devoxx conference talk. Learn how a simple idea to allow delivery people access to a tenement stairwell evolved into a sophisticated voice-controlled bot for managing electrical devices. Discover the hardware and software components involved, including a Raspberry Pi, MOSFET, open-source private branch exchange, and Groovy interpreter. Delve into the integration of REST calls and conversational systems to create a more intuitive user experience. Follow the speaker's progression from basic door control to an ambitious, extensible home automation system. Gain insights into various technologies such as Java, Asterisk, FreePBX, scripting, dialplan creation, and natural language processing with IBM Watson. Perfect for developers interested in IoT, home automation, and conversational AI applications.