Integrating Echo Sub with Fire TV and Enhancing Home Automation

I recently upgraded my home theater setup with a 75" Omni QLED Fire TV and the Fire TV soundbar. While everything works smoothly, I’m curious about enhancing the audio experience by adding an Echo Sub. I’ve heard great things about its bass performance, but I’m unsure if it’s compatible with my current setup. I’ve also considered using a Bluetooth subwoofer from another brand, but I want to ensure seamless integration with my Fire TV. Has anyone successfully paired an Echo Sub with their Fire TV setup? Any tips or experiences would be invaluable!

On another note, I’ve been exploring ways to automate my home more effectively. I recently set up a system where my car’s block heater starts based on the weather forecast. The idea is to activate it 30 minutes before the forecasted low temperature, adjusting by five minutes for each degree below freezing. However, I’m struggling with the syntax to set this up in my automation script. Specifically, I need help converting the temperature value into a precise time adjustment. If anyone has experience with similar automations or can guide me on the correct syntax, I’d be extremely grateful!

Looking forward to hearing from the community and learning from your experiences!