I’ve always been fascinated by the potential of home automation to integrate with emergency response systems. As a volunteer firefighter, I wanted to find a way to enhance my home’s preparedness for emergencies. After some research and experimentation, I developed a system that alerts me visually when a fire or EMS call is paged to my station. Here’s how I did it and how you might adapt it for your needs.—### The ChallengeVolunteer first responders often receive alerts via pager tones. These tones are transmitted over specific radio frequencies, and while effective, they lack visual cues, especially during the night. I wanted a system that would flash my smart lights whenever a call is received, ensuring I never miss an alert.—### The SolutionI combined Home Assistant with a Raspberry Pi, RTL-SDR dongle, and some Python scripting to detect the specific tones used by my department. Once detected, the system triggers a webhook in Home Assistant, which then activates my lights.#### Key Components- Home Assistant: For automation and integration.- Raspberry Pi 4: To run the detection script.- RTL-SDR Dongle: To capture radio signals.- Python Script: Uses the Goertzel algorithm to detect specific tones.#### How It Works1. The RTL-SDR listens to the frequency used by my department.2. The Python script detects the two specific tones that indicate a call.3. Upon detection, it sends a signal to Home Assistant via a webhook.4. Home Assistant triggers my lights to flash, ensuring I’m alerted even at night.—### Benefits- Reliability: Works even during power or internet outages (if paired with a generator).- Customization: You can adjust the script to match your department’s tones.- Integration: Seamlessly integrates with existing smart home setups.—### Tips for Success1. Test Thoroughly: Adjust the tone detection thresholds to minimize false positives.2. Location Matters: Ensure your RTL-SDR antenna has a clear view of the sky for optimal signal reception.3. Backup Power: Consider adding a UPS to keep your Raspberry Pi running during power outages.—### Looking AheadThis project has been a game-changer for me. I’m now exploring ways to expand it, such as adding voice alerts or integrating with my phone’s notifications. The possibilities with Home Assistant and custom scripts are truly endless!If you’re interested in similar projects or have questions about my setup, feel free to reach out. I’d love to hear about your experiences with emergency alert integration or other creative uses of home automation!