Currently I am using a Rasberry Pi4 and for Zigbee HA the Sonoff Plus-E. Now I want to use 2MQTT with the same dongle. Does this work? Or do I need a second dongle (e.g. Sonoff Plus-E) for using 2MQTT and Zigbee HA at the same time?
BR Emilio
No, it does not work. You need 2 dongles to use both ZHA and Zigbee2MQTT.
Bear in mind that you will have two separate networks. You will probably have to move some of your devices onto the new one to make is work, so both of them are going to be less robust than the one you have at the moment.
1 Like
And don’t buy two of the identical models. I did that once, had 2 Zigbee 3.0 USB Dongle Plus P versions, and they were assigned the same serial ID.
I think there were some ID issues with early/first batch Dongle-Ps, but shouldn’t be a problem now.
I have multiple installs with more than one Dongle-P and/or Dongle-E, never seen that as an issue.
1 Like
Bought from the first batch Dongle-P, as they had an introduction price. Definitely the same serial-id, and not like the new ones with Sonoff in them. But they work well anyway 
I use two dongles (both Conbee IIs) to run ZHA and deConz. I do this because I have 14 of color-temperature bulbs in a track light and 24 others in another lamp that have physical wall switchs. When (not if) the wall switch is turned off, the whole Zigbee network goes down for several minutes because it loses too many nodes. This means that most switches/plugs/other items on the network stop working for a while, which drives people nuts. (Think of the evening: you turn off the track lights, then all of a sudden the bedside remote stops working for 5 minutes…)
To solve this I put the switches and plugs on a second Zigbee network (via deConz, but you could use mqtt) and have all my color-temperature bulbs on the ZHA network. That way when (not if) the wall switch is used, all I lose is that some other color-temperature bulbs may not change temperature until the network rebuilds. This has worked really well.
-David