I would like to use with openhab 5.1.0.M2 the Sonoff USB dongle plus-E. After installing the zigbee binding I select in my case COM3 which is not used from another application. Unfortunately I get a communication error and i can not connect. I tried also other com-ports but always the same error. W…

That device uses an Ember chipset. Did you review and follow the Ember specific steps in the add-on docs? ZigBee - Bindings | openHAB In particular Note that there are generally two versions of the Ember NCP firmware in use. One operates at a baud rate of 115200 with RTS/CTS flow control (i.e. har…

Thanks for the replies. I tried to use the recommended port settings but without success. Then I used a python script to check what kind of data I receive from the dongle. With the suggested port settings I only got “non humable” readings. I installed the manufacturer windows driver which is regist…

So, at this point we can now conclude you are using windows OS I am guessing win11 or maybe 10 Either way then you can go on the sonoff website and launch the utility from them and it will read the firmware version and report it if it can read the dongle correctly if that works great you know that …

thanks for your reply. I am using following configuration: win11 OH 5.1.0.M2 (as a service) Sonoff ZBDongle-E with latest firmware 8.0.2 Binding → Ember Coordinator Windows Com → COM3, I use this port in the binding I use the “Reinitialize Controller” in the binding too Same communication error …

[image] Norick: Do u used other different settings? What is different for my install. I use [image] justaoldman: the original firmware 6.10.3.0 I have not had any issues with the above version it is the only one on the sonoff GitHub website that is shown as compatible with openhab base…

Ok I added those line. After restarting OH, flashing the sonoff firmware back to 6.10.3, adding the Ember coordinator with the correct com-port the dongle is used i get this error message: ERROR Logger Class org.openhab.core.io.rest.core.internal.thing.ThingResource Message Exception during…

Hi, As a test can try a few things. stop openhab as a windows service and disable the service in services. reboot the PC logon to the PC with an account that has administrator rights. Launch Openhab with the start.bat in the openhab folder with admin rights. Check if the dongle comes online or sa…

Hello, I followed your steps and also installed the OH5.0.2 but everything without success. I checked many times the comport settings but there is no mistake on that. For some unknown reasons, I always get the “communication error” reported. For me it looks somehow the comport I use for the dongle…

Hi, If you followed the steps for a clean basic OH 5.0.2 and only added the Zigbee binding and nothing else then OH should not be using any other com ports at this point except what you configured for the dongle. This test effectively removes OpenHAB from being the issue. Which points it back to …

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Zigbee with Sonoff USB Dongle Plus-E

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pguima (Luiz) November 19, 2025, 2:45am 3

Have a look at this post. I ran into a issue with the zigbee dongle, might give you an idea to solve your problem.