Hey everyone! I wanted to share my recent success in integrating RGB LED lights with SmartThings to create automated scenes. This project has been a lot of fun, and I’m excited to walk through my journey in case anyone else is looking to do something similar. The Goal: I wanted my RGB LED lights to automatically change colors based on specific events. For example, when the doorbell rings, the lights should flash between red and blue, and when it’s cold outside, they should display deep blue, gradually transitioning to red as the temperature warms up. The Setup: I started with RGB LED floodlights and strips that I modified to accept MQTT commands. This involved soldering an ESP8266 module onto each unit and setting up a simple circuit to handle the MQTT communication. It was a bit of a DIY project, but it was worth it for the customization. The Challenge: The main hurdle was figuring out how to automate the color changes without manually adjusting each light. I knew SmartThings could handle this with rules, but I wasn’t sure how to translate the color changes into executable commands. The Solution: After some research, I discovered that SmartThings allows users to create custom rules using the Rule Machine. I decided to use the built-in color picker widget for manual adjustments but needed a way to automate the process. Here’s what I did: 1. MQTT Integration: I configured my ESP8266 modules to publish and subscribe to MQTT topics related to the lights. 2. SmartThings Rules: I created rules in SmartThings that trigger when specific events occur (e.g., doorbell press, temperature changes). 3. Color Logic: For temperature-based color changes, I used a simple algorithm that maps temperature values to RGB colors. For example: - Deep blue (0000FF) for temperatures below 32°F. - Gradual transition to red (FF0000) as temperatures rise above 68°F. 4. Testing: I tested each rule individually to ensure they worked as expected before combining them into a cohesive system. The Results: It’s amazing how seamless everything works now! When the doorbell rings, the lights flash red and blue, creating a fun and festive atmosphere. The temperature-based color changes are smooth and provide a visual indication of the outdoor conditions without needing to check a sensor. Tips for Others: - Start Small: Begin with one light or a simple rule to get comfortable with the setup. - Use MQTT: MQTT is incredibly versatile for IoT projects and makes integrating different devices much easier. - Experiment with Algorithms: Don’t be afraid to tweak your color transition logic to match your preferences. This project has not only enhanced my home automation setup but also given me a deeper appreciation for the flexibility of SmartThings. I’m already brainstorming new ways to expand this system, like adding sound effects or integrating with other smart devices. If anyone has questions or wants more details on any part of this setup, feel free to ask! I’d love to help others achieve similar results.