Thanks.
This is not the final product, just a proof of concept.
So ASR6501 has not to be the final ChipSet we are going to use.
I will switch to TTI when the registering error disappears.
We have many others LoraWan Modules as final candidates, but if you can recommend one it will be much appreciated.
Others seen are AI_RA07, AI_RA08, Murata CMWX1ZZABZ, MURATA 1SJ, RFM6501, SEEEDUINO LoRa-E5.