Living Room Smoke Detector

Living Room Smoke Detector

A simple, focused smoke and fire detection system that monitors the living room ALPSTUGA air sensor via the Dirigera hub.

What It Does

• Queries Dirigera directly every 5 minutes (not from database)
• Simple state only - keeps just the latest reading, no history
• Detects danger: PM2.5 > 250 µg/m³ OR CO2 > 2000 ppm
• Continuous alert - plays "Attention! Abnormal smoke level detected" on Mac speaker
• Loops until cleared - keeps playing every 5 seconds until air quality normalizes
• Backup smoke alarm - works alongside your regular smoke detector

Setup

1. Copy Alert Sound (optional)

If you already have the alert sound from the air monitor skill:

cp ~/.openclaw/workspace/skills/living-room-air-monitor/data/smoke_alert_message.mp3 \
   ~/.openclaw/workspace/skills/living-room-smoke-detector/data/alert.mp3

Otherwise it will auto-generate on first run.

2. Cron Setup

Add to crontab to check every 5 minutes:

*/5 * * * * /opt/homebrew/bin/python3 /Users/macmini/.openclaw/workspace/skills/living-room-smoke-detector/scripts/smoke_detector.py >> /tmp/smoke_detector.log 2>&1

Usage

Manual Check

python3 ~/.openclaw/workspace/skills/living-room-smoke-detector/scripts/smoke_detector.py

View Status

# Latest reading
cat ~/.openclaw/workspace/skills/living-room-smoke-detector/data/detector_state.json

# Log
tail -f /tmp/smoke_detector.log

How It Works

1. Cron triggers every 5 minutes
2. Fetches data directly from Dirigera hub
3. Checks thresholds:
   • PM2.5 > 250 µg/m³ (smoke particles)
   • CO2 > 2000 ppm (combustion byproduct)
4. If danger detected:
   • Saves state (alert_active = true)
   • Enters alert loop
   • Plays alert sound every 5 seconds
   • Re-checks sensor between plays
   • Exits loop when air clears
5. If normal: Updates state and exits

State File

data/detector_state.json:

{
  "latest_reading": {
    "pm25": 3,
    "co2": 525,
    "time": "2026-02-25T20:30:00"
  },
  "alert_active": false,
  "last_check": "2026-02-25T20:30:00"
}

Alert Behavior

When danger is detected:

• Mac speaker plays: "Attention! Abnormal smoke level detected"
• Waits 5 seconds
• Checks sensor again
• Repeats until PM2.5 ≤ 250 AND CO2 ≤ 2000
• Press Ctrl+C to stop manually if needed

Files

Dependencies

• Python 3.x
• Dirigera hub access (192.168.1.100)
• Auth token at ~/.openclaw/workspace/.dirigera_token
• macOS afplay (built-in)
• say and ffmpeg (for alert generation)

Differences from Air Monitor Skill

Use both for complete coverage: air monitor for data logging, smoke detector for focused alerting.