Hi everyone! (this is my first post! 
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I am running Zigbee/ZHA using the ‘Sonoff Zigbee 3.0 USB Dongle Plus V2’ with NCP firmware 7.3.1.0 build 176. I am experiencing some issues with devices dropping off and have already investigated other measures for improving network performance. Hence I would like to update the Dongle-E to the latest firmware.
I have a secondary Dongle-E unit which I would like to prepare with the latest firmware before swapping it with the ‘production’ unit.
Question 1: What would be the process for replacing the currently running Dongle-E with the secondary one, once updated? Will either of the options ‘DOWNLOAD BACKUP’ or ‘MIGRATE RADIO’ in the Zigbee ‘Network Settings’ page be required? Or can the sticks simply be exchanged while the HA unit is powered down?
Question 2: What are the considerations in choosing between firmware versions provided directly by itead (link - latest fw 7.4.4) vs. darkxst’s (link - latest fw 7.4.5)?
Question 3: Will the update necessitate any changes to the driver setting for EZSP vs Ember, or is this only needed when running z2m?
Question 4: The latest Home Assistant Update (2025.4) includes update functionality for HA Yellow Zigbee/Thread unit and HA ZBT-1 directly through Home Assistant. Considering that ZBT-1 and Sonoff Dongle-E share the same chip (EFR32MG21), will a similar update function be implemented for the Sonoff Dongle-E at some point?
Side Note: I did come across this related topic for updating the Dongle-E firmware in place, however it does not fully apply to my situation with the two Dongle-E sticks.
Thank you very much for your support!
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