Thanks for your reaction!!!
I am going to experiment with it and post proceedings later!

@mfalkvidd

Somebody has to make that mistake again!
This time it was me!

Thanks.

@mfalkvidd

I did some tests.
I put a byte counter I a loop without delay.
The nano was able to publish every fourth number. So the network is functioning but for not a very high speed requirement.

I did the same with a MQTT client on a Wemos D1 mini module. The difference in speed was dramatic. No gaps between numbers and much faster.

Because of the envisioned use for controlling a model railroad track layout I decided to go for the higher performance of the Wemos with all negative consequences as far s complexity of decoder composition is concerned.

Thanks for the support!