I have several Blue Series products (1 - VZM30-SN (Firmware: 0x01100101), 2 - ZVM31-SN (Firmware: 0x04010101) , 2- VZM-36 Firmware: 0x04010101) which continually drop from the Zigbee network after successfully pairing. All of which were new in box before installation and are currently only connected to mains power (Line and Neutral). Trying to flash them to current code fails either immediately or anywhere up to 25% of the firmware upload process. I am using Home Assistant w/ZHA:
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Installation methodHome Assistant OS
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Core2026.8.3
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Supervisor2026.07.5
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Operating System18.2
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Frontend20260729.7
Zigbee Radio is the ZBT-2
There is a working VZM36 which was installed over a year ago with is functioning correctly.
Working:
Connected via Home Assistant Connect ZBT-2
VZM36 - LR Canopy
Firmware: 0x04010102
Zigbee info
Nwk: 0xec9e
Device Type: Router
LQI: 160
RSSI: -60
Last seen: 2026-08-24T16:23:00
Power source: Mains
Quirk: zhaquirks.inovelli.VZM36:(Inovelli / VZM36)
Distance from the Zigbee coordinator does not effect the results.
What can I do to correct the issue?
Thanks!
John