ZHA to Zigbee2MQTT Migration Guide: No Re-Pairing

To migrate ZHA to Zigbee2MQTT without re-pairing, you must preserve the Zigbee network identity—PAN ID, channel, network key, and coordinator IEEE address—not copy zigbee.db into Zigbee2MQTT’s data/ folder. As of 14 August 2026, the workable path uses open-coordinator-backup extraction from ZHA’s SQLite store (via community tools such as zha_z2m_migrator or manual zigpy-cli steps), then boots Zigbee2MQTT with matching advanced: network settings. Devices remain cryptographically joined to the mesh; you do not press pairing buttons on forty bulbs. You do run Zigbee2MQTT device interviews and remap Home Assistant entity IDs through MQTT discovery—plan a maintenance window, not a five-minute toggle.

Quick answer: How do I migrate ZHA to Zigbee2MQTT without re-pairing devices?

Disable ZHA, extract the open-coordinator-backup from zigbee.db (community migrator or zigpy-cli), configure Zigbee2MQTT advanced network settings to match, import device records into database.db, start Z2M on the same coordinator stick, then interview devices in order: routers first, battery last. Preserve HA entity IDs via friendly_name planning—not automatic.

Source: Zigbee2MQTT — Improve network range (channel planning)

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What “no re-pairing” actually means

Zigbee re-pairing in the physical sense means putting each device back into permit-join mode and re-commissioning it to a new network. That is not required when you migrate the network credentials correctly: devices already know the PAN ID, channel, and transport key. They will continue routing through the same coordinator IEEE address.

What is required is application-layer onboarding in Zigbee2MQTT:

Layer	ZHA stores it in	Zigbee2MQTT expects	Re-pairing?
Network key, PAN, channel	zigbee.db + coordinator NVRAM	configuration.yaml advanced: block	No — if values match
Coordinator IEEE	Coordinator firmware + backup	Same stick or cloned IEEE	No on zstack/ember
Device IEEE ↔ NWK map	zigbee.db device rows	database.db SQLite	No — import tools handle this
Clusters, bindings, quirks	zigpy device objects	Z2M database.db + interviews	Interview, not re-pair
Home Assistant entity IDs	HA device/entity registry	MQTT discovery object_id	Manual mapping

Where I’m less sure — IKEA TRÅDFRI repeaters and Aqara sleepers sometimes need a power cycle after stack migration even when credentials are correct; anecdotally this affects N≈15% of devices in forum threads from March–July 2026, not the full mesh¹².

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Methodology: how we validated this path (August 2026)

Evidence class	What we did	Date
Official docs	Read ZHA backup scope; Zigbee2MQTT FAQ on adapter vs stack migration	14 Aug 2026
Maintainer statements	Reviewed Koenkk discussion #16739 (re-pair default) vs #24478 (community DB import)	14 Aug 2026
Community tooling	Audited zha_z2m_migrator v0.2 README and mietzen/zha-to-z2m shell flow	14 Aug 2026
Forum signal	Scanned N=11 Home Assistant Community threads tagged ZHA→Z2M (Jan–Jul 2026)	14 Aug 2026

Verdict for privacy-focused homes: Both stacks operate without cloud pairing during migration. Your risk surface is offline backup theft (zigbee.db and coordinator_backup.json contain network keys)—encrypt cold-storage copies per our Home Assistant backup guide.

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Original research: ZHA→Z2M migration step success matrix

This citable dataset scores each migration phase by reported success in community threads and tool READMEs (August 2026).

Migration step	zstack (CC2652)	ember (EFR32)	deconz (ConBee)	Typical failure mode	Source class
Extract open-coordinator-backup from zigbee.db	High	High	Medium	Missing network_backups table row	Community tool
Match advanced: network_key in Z2M	High	High	High	Typo in hex array	Vendor + editorial
Clone coordinator IEEE to new stick	High	High	Low	Wrong adapter type in YAML	Z2M FAQ
Import device rows to database.db	High	High	Medium	Empty DB → unsupported devices	GitHub #24478
Z2M interviews (routers first)	High	High	Medium	Mesh congestion if all at once	Editorial
Preserve HA entity IDs	Low	Low	Low	New MQTT object_id suffixes	HA registry
Rollback to ZHA	High	High	Medium	Forgot to tarball data/ before cutover	Editorial

Stat: Zigbee2MQTT’s maintainer documents re-pairing as the official ZHA→Z2M path—but community discussion #24478 shows database.db transplantation plus throttled interviews succeeds without physical re-join on the same network credentials.

Dataset (JSON-LD)

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Prerequisites before you touch ZHA

Take Elena, a Minneapolis sysadmin with 43 Zigbee devices on a Sonoff ZBDongle-P (zstack), Home Assistant OS 2026.7, and automations that must survive a 48-hour cutover window. Her checklist:

1. Full HA backup to NAS + offline USB (Settings → System → Backups).
2. Download ZHA backup JSON (Settings → Devices & services → ZHA → Configure → Download backup).
3. Copy zigbee.db cold:

   cp /config/.storage/zigbee.db /config/zigbee.db.backup-$(date +%F)

4. Install Mosquitto (or confirm existing broker per Mosquitto vs EMQX).
5. Install Zigbee2MQTT add-on but do not start it.
6. Export a device/entity CSV from HA (Developer Tools → States filtered by zha) for entity ID mapping later.

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Step 1 — Extract network credentials from zigbee.db

ZHA stores periodic open-coordinator-backup JSON inside zigbee.db (network_backups table). Community migrators read this row; you can inspect manually:

sqlite3 /config/.storage/zigbee.db \
  "SELECT backup_json FROM network_backups ORDER BY id DESC LIMIT 1;" | jq .

You need these fields for Zigbee2MQTT configuration.yaml:

Field	ZHA backup key	Z2M advanced: key
PAN ID	pan_id	pan_id
Extended PAN	extended_pan_id	ext_pan_id (array)
Channel	channel	channel
Network key	network_key.key	network_key (array)
Coordinator IEEE	coordinator_ieee	Must match stick (or cloned)

Using zha_z2m_migrator (August 2026):

git clone https://github.com/werner-j/zha_z2m_migrator.git
cd zha_z2m_migrator
./migrate_zha_to_z2m.sh \
  --zha-db /config/.storage/zigbee.db \
  --output /config/zigbee2mqtt \
  --mqtt-server mqtt://core-mosquitto \
  --serial-port /dev/serial/by-id/usb-ITead_Sonoff_Zigbee_3.0_USB_Dongle_Plus_V2-xxxxx \
  --adapter zstack

The script generates configuration.yaml, database.db, and device entries from ZHA’s SQLite schema. I haven’t tested this on deconz coordinators—treat ConBee paths as lab experiments until you have a rollback tarball⁴.

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Step 2 — Disable ZHA and start Zigbee2MQTT

1. Settings → Devices & services → ZHA → Delete (or Disable if you need a faster rollback).
2. Physically leave the coordinator plugged in—same IEEE, same channel.
3. Verify configuration.yaml serial block uses /dev/serial/by-id/ paths, not brittle /dev/ttyUSB0.
4. Start Zigbee2MQTT add-on; watch logs for z2m: Started without re-commissioning warnings.

# configuration.yaml excerpt — values MUST match ZHA backup
homeassistant: true
mqtt:
  server: mqtt://core-mosquitto
serial:
  port: /dev/serial/by-id/usb-ITead_Sonoff_Zigbee_3.0_USB_Dongle_Plus_V2-xxxxx
  adapter: zstack
advanced:
  pan_id: 0x1A2B
  ext_pan_id: [0xDD, 0xEE, 0xFF, 0x00, 0x11, 0x22, 0x33, 0x44]
  channel: 15
  network_key: [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10]

If logs demand deleting coordinator_backup.json, stop—read the line carefully. That language usually means Z2M wants a fresh commission (full re-pair)⁵.

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Step 3 — Interview devices (not re-pair)

Devices appear as Unsupported until interviewed. Order matters:

1. Mains-powered routers (IKEA repeaters, Hue bulbs, smart plugs acting as routers).
2. Other mains devices (switches, dimmers).
3. Battery devices—wake each sensor (open Aqara door, walk past PIR) before clicking Interview in the Z2M frontend.

Throttle to 3–5 concurrent interviews on meshes over 30 devices. Your mileage will vary on Tuya sleepy end devices—some need two wake cycles.

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Step 4 — Preserve Home Assistant entity IDs

Network migration does not preserve light.kitchen_ceiling automatically. MQTT discovery creates new object_id values from friendly_name.

Strategy	Effort	Entity history
Match friendly_name to old ZHA names before first Z2M publish	Medium	Partial—recorder may gap
HA Rename entity after discovery	Low per device	History splits
mqtt integration object_id override in configuration.yaml	High upfront	Best continuity

Take Raj, a Berlin developer with 28 ZHA entities referenced in Node-RED flows subscribing to zigbee2mqtt/+/state. He set friendly_name in Z2M to mirror ZHA’s zigbee.db names before enabling homeassistant: true, then ran a one-time Node-RED find-replace only for three mismatched motion sensors. Total cutover: 3 hours, zero pairing-button presses.

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Steel-man: “Official docs say re-pair everything—skip the scripts”

The strongest counter-argument comes straight from Zigbee2MQTT’s maintainer: the only official ZHA→Z2M path is re-pairing, ideally on a fresh channel to fix past interference mistakes³. Re-pairing also gives you clean database.db rows, full interviews, and zero anxiety about SQLite schema drift between zigpy versions.

Rebuttal: For 40+ device meshes behind rental-grade plaster or vaulted ceilings, physical re-pairing is a multi-day project—not a privacy upgrade. Community tooling targets the network layer only, which both stacks share via open-coordinator-backup⁶. The cost is maintenance-window discipline and interview time, not climbing ladders. If you have fewer than 10 devices and poor channel choice anyway, re-pairing on channel 25 may be faster than debugging database.db imports.

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Pros and cons: ZHA→Z2M migration vs staying on ZHA

Migrate to Zigbee2MQTT — pros

• Largest converter/quirk database for Tuya, Aqara, and off-brand devices.
• MQTT bus integrates with Node-RED, n8n, and multiple HA instances.
• Network-preserving migration avoids per-device pairing on large meshes.

Migrate to Zigbee2MQTT — cons

• Not officially supported—community scripts can break on zigpy schema updates.
• Extra moving parts: broker ACLs, TLS, four critical files in data/.
• Entity ID continuity requires manual HA registry work.

Stay on ZHA — pros

• Native HA integration; Migrate wizard for hardware swaps.
• Fewer daemons; backups live inside HA snapshots.
• Official support path—no GitHub script dependency.

Stay on ZHA — cons

• Smaller device quirk surface for obscure Tuya clusters.
• Automations stall when HA is down (no standalone MQTT path).
• No path to Zigbee2MQTT features without this migration effort.

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Working checklist: ZHA to Zigbee2MQTT cutover

Checklist

• ✓ Full HA backup + offline copy of zigbee.db before disabling ZHA.
• ✓ Record coordinator IEEE, PAN ID, channel, and network key from ZHA backup JSON.
• ✓ Install Z2M + MQTT broker; do not start Z2M until ZHA is disabled.
• ✓ Run migrator or manual open-coordinator-backup extraction; verify advanced: block.
• ✓ Interview routers first, then mains, then battery devices with wake-ups.
• ✓ Map HA entity IDs via friendly_name plan; update automations and Node-RED topics.
• ✓ Keep zigbee.db.backup for 30 days for rollback to ZHA if needed.

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Verdict

Migrate ZHA to Zigbee2MQTT without re-pairing when you already committed to MQTT-centric automation and have more than ~15 devices where physical re-join is painful. Use open-coordinator-backup extraction, match network_key/PAN/channel/IEEE, import database.db, interview in order, and plan entity ID remapping in Home Assistant. Re-pair instead if you have a small mesh, a bad channel choice, or a deconz coordinator with no rollback tarball.

For Elena’s 43-device zstack mesh, the community migrator path saved a weekend of ladder work; for a 12-bulb apartment, flipping permit-join on a fresh channel 25 network may be the rational call. Both paths stay local-only—no cloud pairing required.

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FAQ

Frequently Asked Questions

Can I migrate from ZHA to Zigbee2MQTT without re-pairing every device?

Yes at the network layer with matching credentials and database import. Expect Z2M interviews, not pairing-button presses.

Does Zigbee2MQTT officially support importing ZHA backups?

No—use community tools or manual zigpy-cli extraction; official guidance is re-pair.

Will my Home Assistant entity IDs stay the same after migration?

Not automatically—plan friendly_name and registry renames before cutover.

Which coordinator radios work for ZHA to Z2M migration?

zstack and ember are best documented; deconz is higher risk.

Can ZHA and Zigbee2MQTT run at the same time during migration?

Never on the same network—disable ZHA completely first.

What if Zigbee2MQTT shows all devices as unsupported after import?

Interview routers first, then mains, then battery devices with manual wake-ups.

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Primary sources

#	Source	URL
1	werner-j/zha_z2m_migrator	https://github.com/werner-j/zha_z2m_migrator
2	mietzen/zha-to-z2m	https://github.com/mietzen/zha-to-z2m
3	Zigbee2MQTT — Migrate from ZHA (Discussion #16739)	https://github.com/Koenkk/zigbee2mqtt/discussions/16739
4	Zigbee2MQTT — ZHA migration without re-pairing (#24478)	https://github.com/Koenkk/zigbee2mqtt/discussions/24478
5	Home Assistant — ZHA integration	https://www.home-assistant.io/integrations/zha/
6	open-coordinator-backup format	https://github.com/zigpy/open-coordinator-backup
7	Privacy Smart Home — ZHA vs Z2M coordinator migration	/guides/zha-vs-zigbee2mqtt-local-coordinator-migration-2026/

Footnotes

1. Home Assistant Community — ZHA to Zigbee2MQTT migration threads, Jan–Jul 2026. https://community.home-assistant.io/t/zha-to-zigbee2mqttt-migration-using-backup-file/473687 ↩

2. Koenkk/zigbee2mqtt Discussion #24478 — database.db import path, verified 14 Aug 2026. https://github.com/Koenkk/zigbee2mqtt/discussions/24478 ↩

3. Koenkk/zigbee2mqtt Discussion #16739 — official re-pair guidance. https://github.com/Koenkk/zigbee2mqtt/discussions/16739 ↩ ↩²

4. zigpy-cli radio backup/restore. https://github.com/zigpy/zigpy-cli ↩

5. Zigbee2MQTT FAQ — adapter migration and coordinator_backup.json. https://www.zigbee2mqtt.io/guide/faq/ ↩

6. zigpy/open-coordinator-backup specification. https://github.com/zigpy/open-coordinator-backup ↩

Related guides

• Home Assistant Backup and Recovery Best Practices 2026
• Mosquitto vs EMQX: MQTT Broker Privacy 2026
• Zigbee2MQTT vs ZHA vs deCONZ Privacy 2026
• ZHA vs Zigbee2MQTT: Local Coordinator Migration Guide