Hey everyone! I’ve been diving into creating a smart bathroom ventilation system, and I wanted to share my experience and some tips for those who might be interested in setting something similar up. 
The Goal:
I wanted to automate the bathroom fan to turn on when motion is detected, but only if someone is actually in the bathroom for more than a minute. This way, it avoids running unnecessarily when someone just quickly uses the restroom. Additionally, I wanted the fan to stay on for a few minutes after the bathroom is empty to ensure proper ventilation. 
The Setup:
I’m using an Aqara motion sensor and a Shelly relay to control the fan. The motion sensor detects movement, and the Shelly relay switches the fan on and off. The automation is managed through my smart home hub. 
The Challenges:
Initially, I struggled with setting up the right automation rules. I wanted the fan to activate only when motion was detected for more than a minute, but I wasn’t sure how to configure that. After some research and experimentation, I found that setting a delay in the automation rules worked perfectly. 
The Solution:
Here’s how I set it up:
- Motion Detection: The Aqara motion sensor detects movement in the bathroom.
- Delay: If motion is detected for more than a minute, the fan turns on.
- Post-Movement: The fan stays on for an additional 5 minutes after the last detected motion to ensure the room is properly ventilated.
The Outcome:
This system has been working beautifully! It’s energy-efficient and ensures that the bathroom stays fresh without running the fan unnecessarily. Plus, it’s been a great learning experience for me in terms of setting up more complex automations. 
Tips for Others:
- Start simple and gradually add more complex rules as you get comfortable with your system.
- Don’t hesitate to reach out to the community for help. There are so many knowledgeable people who are more than happy to assist!
- Experiment with different delay times to find what works best for your space.
I hope this helps anyone looking to create a similar setup. Let me know if you have any questions or if you’ve tried something like this in your home! 