Effortless Sunset Watering Automation with Home Assistant

General
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Home automation has truly transformed my gardening routine! :seedling: I’ve been wanting to optimize my watering schedule to start 117 minutes before sunset, ensuring my plants get the perfect soak without wasting water. Here’s how I cracked it using Home Assistant and Node-RED:

  1. Understanding the Duration: My watering zone entity has a handy attribute data.attributes.Duration set to 117 minutes. This is the key value I needed to work with.

  2. The Challenge: I wanted to automate the watering to start precisely 117 minutes before sunset. While I usually rely on the BigTimer node for scheduling, I realized I needed a more dynamic solution this time.

  3. The Solution: I created a Function node in Node-RED to calculate the sunset time using the built-in sun service. Then, I subtracted 117 minutes from this time to set the watering start time dynamically. This ensures the watering schedule adapts perfectly to seasonal daylight changes.

  4. Implementation: The Function node calculates the desired start time and passes it to the BigTimer node, which handles the scheduling. This setup now runs seamlessly without any manual input!

Why This Matters: Automating such specific tasks not only saves time but also optimizes resource usage. I’m thrilled with how Home Assistant and Node-RED can be tailored to meet even the most specific automation needs.

If anyone has questions or needs help setting up something similar, feel free to reach out! :star2: HomeAutomation #SmartGardening