Hi @francisp.
I clearly have missed the right wording (trying to at least).
The USB Dongle is on my server and is the main integration - I was just looking for a way to extend the range and bought the Sonoff Zigbee Bridge.
If I should get away with the CC2531 altogether it is fine - and I can just use the bridge when flashed.
I will read through your link.
THANKS!
Update: I see the Bridge has caused some issues especially when the Wifi is not strong