feat(zigbee2mqtt): Zigbee2MQTT 2.14.1 on esh-docker-vm, replacing HA's ZHA
Requested by ha-dev; approved by Prime in this session. Radio: SLZB-MR1U chip 0 (EFR32MG21, EmberZNet 8.0.2) at tcp://10.0.90.10:6638, adapter ember. A fresh network was formed on channel 25, PAN 0xCFF4. The broker is reached as mosquitto user zigbee2mqtt, with HA discovery on homeassistant/. The frontend on :8099 is token-protected. State and the network key stay host-only in /opt/docker/data/zigbee2mqtt (root 0700, restic). The repo carries only compose, .env.example and the README. configuration.yaml refers to the secrets as !secret.yaml, and those references survived Z2M's v4->v5 settings migration.
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# zigbee2mqtt
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The **house Zigbee stack** on esh-docker-vm, replacing Home Assistant's ZHA. It was
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requested by ha-dev and approved by Prime on 2026-09-27. It started greenfield: the
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Zigbee network had no devices, so nothing was migrated.
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|---|---|
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| **Frontend** | `http://10.0.50.45:8099`, protected by an auth token (vault `esh-docker-vm/zigbee2mqtt-frontend-token`) |
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| **Image** | `koenkk/zigbee2mqtt:2.14.1@sha256:fef0de76…` (`.env` `IMAGE`, digest-pinned) |
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| **Radio** | SLZB-MR1U `10.0.90.10` (VLAN 90), chip 0 = EFR32MG21 / EmberZNet 8.0.2, `tcp://10.0.90.10:6638`, adapter `ember`. Chip 1 (CC2652P7, :6639) is unused. |
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| **Network** | channel 25, PAN ID **0xCFF4** (53236), extended PAN ID `0xd0cbe1735919b497`, coordinator IEEE `0x187a3efffe99a487`. Formed fresh on 2026-09-27 (the EFR32 left the abandoned ZHA network: channel 25, PAN 0xF09F). |
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| **MQTT** | `mqtt://mosquitto:1883` over `traefik-net`, as broker user `zigbee2mqtt` (vault `esh-docker-vm/zigbee2mqtt-mqtt-password`). Base topic `zigbee2mqtt`, HA discovery on `homeassistant/`. |
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| **State** | `/opt/docker/data/zigbee2mqtt` (root 0700): `configuration.yaml`, `secret.yaml`, `coordinator_backup.json`, `database.db`. Backed up by the host's restic (`/opt/docker`). |
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## ⚠ The network key
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`secret.yaml` holds the Zigbee **network key**, which encrypts the whole mesh. The same
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key is in the vault as `esh-docker-vm/zigbee2mqtt-network-key`. If it is lost, every
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device must be re-paired. It must never be in git. That is why this repo holds only
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`compose.yaml`, `.env.example` and this README; the data dir is host-only and
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`deploy-stack.sh` never touches it. `configuration.yaml` refers to the secrets as
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`'!secret.yaml <key>'`.
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## Notes
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- **One client per radio socket.** HA's ZHA must stay disabled or deleted while Z2M
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owns 6638.
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- **Configured by IP.** Containers here cannot resolve `*.internal`. The SLZB's mDNS
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TXT record advertises `radio_type znp` for 6638, which is wrong: 6638 speaks EZSP/Ember.
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- **Pairing is timed.** Z2M 2.x has no `permit_join` setting. Joining is opened from
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the frontend or over MQTT, and closes on a timer.
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- The broker user was added with `mosquitto_passwd` + `SIGHUP`; the password file's
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owner and mode are unchanged (1883, 0600). The broker still has
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`allow_anonymous true`, a pre-existing setting that is not this stack's to change.
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## Acceptance (2026-09-27, first start at 1240)
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- Z2M 2.14.1 on EmberZNet 8.0.2 (EZSP 14). herdsman reported "Adapter network does not match
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config. Leaving network...", found no backup, and formed a new network on channel 25:
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PAN 0xCFF4. It wrote `coordinator_backup.json`.
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- `zigbee2mqtt/bridge/state` = `{"state":"online"}`, and the bridge's 8 HA discovery configs are
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retained under `homeassistant/+/1221051039810110150109113116116_0x187a3efffe99a487/…`. Whether
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the device shows up in HA is ha-dev's to confirm.
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- On startup Z2M migrated the settings to `version: 5`. All three `!secret.yaml` references
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survived the rewrite, so no key is in plaintext in `configuration.yaml`. The pre-migration file
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is kept as `configuration_backup_v4.yaml`.
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- Frontend: HTTP 200. The websocket accepts the vault token, and closes with `4401 Unauthorized`
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on a wrong token or no token.
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- Broker: the new user is accepted, a wrong password is refused, and the reload disconnected no
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one. Afterwards 3 clients were connected (HA, the `denspots` Tasmota, Z2M). The Tasmotas
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`consoletree`, `fireplacetree` and `mantlelights` show LWT `Offline`, but they have not connected
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at any point in the broker's current log (back to 2026-09-09), so that predates this change.
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## Deploy
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```bash
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scripts/deploy-stack.sh esh-docker-vm zigbee2mqtt --compose
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# on the host, first time only:
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# /opt/docker/compose/zigbee2mqtt is lkraven:docker 2755, so infra-ops cannot `cp` into it
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cd /opt/docker/compose/zigbee2mqtt && sudo -n install -o lkraven -g docker -m 644 .env.example .env \
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&& docker compose config -q && docker compose up -d
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```
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To upgrade, change `IMAGE` in the host `.env` to a new `tag@digest`, then run
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`docker compose up -d`. Read the release notes first: an adapter or firmware change can
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require re-pairing.
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