Zigbee2MQTT Event Entities vs Legacy Action Sensor Explained
Zigbee2MQTT 2.0 switched off the sensor.*_action entity your button automations used. Here's what replaced it, and which local path to rebuild on.
~/archive $ ls -la
Archive
mqtt
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Zigbee2MQTT Retain vs state.json: What Survives a Restart
Separate MQTT retain, state.json cache and availability when Home Assistant, Zigbee2MQTT or the broker restarts. Includes current replay behavior and checks.
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Zigbee2MQTT Multi-Endpoint Devices: Why switch_l1, switch_l2
Zigbee2MQTT names multi-gang switch entities switch_l1, switch_l2, or switch_left. What an endpoint is, why naming varies, and how to map each gang.
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Zigbee2MQTT MQTT Topics Explained: set, get, Availability
Map Zigbee2MQTT state, SET/GET, availability and bridge topics. Check supported properties, retained data and advanced.output formats for your MQTT clients.
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Zigbee2MQTT Rename Device: What Breaks in Home Assistant
Renaming a Zigbee2MQTT device changes its MQTT topic instantly but not its Home Assistant entity IDs. What breaks, what doesn't, and how to rename safely.
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Zigbee2MQTT database.db Corrupted or Wiped: What to Do
Zigbee2MQTT lost every device after a restart, or database.db is 0 bytes? What the file stores, why it happens, and how to recover before re-pairing.
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Zigbee2MQTT Debounce vs Throttle: Fixing Duplicate Updates
Zigbee2MQTT has five per-device options for noisy state updates. What debounce, throttle, and the filter options each do, and which one fits your device.
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Zigbee2MQTT permit_join: The Security Risk After 2.0
Zigbee2MQTT 2.0 removed permanent permit_join. What the 254-second join window still exposes, and how a device passlist controls membership locally.
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Zigbee2MQTT last_seen Not Updating? What It Actually Tracks
Understand Zigbee2MQTT's last_seen timestamp, distinguish communication from fresh sensor reports, and build a Home Assistant communication-age alert.
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Zigbee2MQTT “Failed to Interview”: Why Pairing Gets Stuck
Troubleshoot Zigbee2MQTT interview failures by checking the failed discovery stage, reset state, battery, interference and model-specific pairing instructions.