Sonoff SNZB-04P Door Sensor: Zigbee2MQTT Setup Guide
Pairing a Sonoff SNZB-04P into Zigbee2MQTT or ZHA without eWeLink: what it exposes, the CR2477 battery question, and why tamper misbehaves on both stacks.
~/archive $ ls -la
Archive
Local Control
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Zigbee2MQTT Discovery Not Working in Home Assistant
Zigbee2MQTT devices showing in the frontend but missing from Home Assistant means MQTT discovery broke, not Zigbee. Here's the real mechanism and fix.
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Zigbee2MQTT Transmit Power: Why It Might Do Nothing
Zigbee2MQTT's transmit_power has per-chip ceilings, a firmware precondition, adapters that reject it outright, and a reason your LQI won't move.
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Zigbee2MQTT Extensions vs External Converters Explained
Zigbee2MQTT extensions change runtime behavior, not device support. Here's how they differ from converters, and how enable_external_js gates both.
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Zigbee2MQTT adapter_concurrent: What It Actually Controls
adapter_concurrent shows up in Zigbee2MQTT's advanced config with no explanation. Here's what the maintainer says it actually does — a command queue depth, not a signal or bandwidth dial — and when raising it is (and isn't) the fix.
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Tuya on an IoT VLAN with Home Assistant: What Breaks
Moving Tuya Wi-Fi devices to an IoT VLAN breaks LocalTuya discovery, not local control. The mechanism, the one firewall rule, and the manual-IP fix.
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Aqara Hub Local API in Home Assistant: Is Telnet Worth It?
AqaraGateway reaches Aqara hub entities HomeKit Controller can't, but it needs telnet access Aqara keeps closing. Here's the real risk, by hub model.
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Tuya Local Key Stopped Working? It’s Not Expiration
Your Tuya local key worked, then stopped. It didn't expire on a timer — here's what actually changes it, and the look-alikes that aren't a key problem.
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Aqara/Xiaomi Region Lock: Does It Affect Zigbee2MQTT?
Bought a CN-market Aqara or Xiaomi device and worried about region lock? Here's what it actually restricts, and whether Zigbee2MQTT pairing works locally.
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Zigbee2MQTT Network Key: Changing It Without Losing Groups/Scenes
Changing the Zigbee2MQTT network key re-pairs every device and drops groups and scenes. The startup error that follows, and how to rebuild them.