SONOFF Zigbee Dongle Max PoE – “ASH stopped / Adapter disconnected” (device still reachable but Zigbee2MQTT doesn’t auto-reconnect)

[Tanjohnson99]

Hello,

We are using the new SONOFF Zigbee Dongle Max PoE (EFR32MG24 + ESP32 bridge, released September 2025).
It works fine most of the time, but several times per day Zigbee2MQTT loses connection to the coordinator and shows:

ash: ======== ASH stopped ========
ezsp: ======== EZSP stopped ========
Adapter disconnected
bridge/state → offline

The dongle itself stays fully reachable on the network:

• ✅ Ping OK
• ✅ TCP port 6638 open
• ✅ PoE power stable (3.4 W on UDM Pro / UniFi Switch PoE)

However, Zigbee2MQTT does not reconnect automatically — we must restart the add-on manually each time.

---

Setup

Hardware

• SONOFF Zigbee Dongle Max PoE (EFR32MG24 + ESP32 bridge, dual 5 dBi antennas)
• UniFi UDM Pro + UniFi Switch PoE (802.3af, stable 3.4 W)
• Connection: Ethernet (PoE)

Software

• Zigbee2MQTT 2.6.2 (Home Assistant add-on, not Docker)
• Mosquitto (core-mosquitto : 1883)

---

Current configuration.yaml

  base_topic: zigbee2mqtt
  server: mqtt://core-mosquitto:1883
  user: mqtt
  password: MY PASS
  include_device_information: true
  maximum_packet_size: 268435456
serial:
  rtscts: false
  port: tcp://10.0.0.32:6638
  adapter: ember
  baudrate: 115200
advanced:
  log_level: info
  channel: 20
  pan_id: 13791
  ext_pan_id:
    - 139
    - 102
    - 89
    - 72
    - 36
    - 111
    - 42
    - 168
  network_key:
    - 202
    - 189
    - 87
    - 198
    - 162
    - 227
    - 100
    - 223
    - 161
    - 118
    - 17
    - 161
    - 87
    - 118
    - 233
    - 213
  transmit_power: 17
  last_seen: ISO_8601
frontend:
  enabled: true
  port: 8099
homeassistant:
  enabled: true

Question

Is this behavior known with the new Dongle Max PoE (EZSP over TCP)?
Are there recommended options or firmware updates to make the TCP/EZSP connection stable and allow automatic reconnection when this happens?

Thanks for your help.