Marco_Benini:
An addendum to my previous post.
I updated to firmware of the Murata chip to version 1.1.5 before testing with TTN.
One of the MKRWAN library examples allow to update the firmware with a pre-compiled version.Firmware Github project "mkrwan1300-fw" can be found here: GitHub - arduino/mkrwan1300-fw
I was able to update the Murata firmware to version 1.1.5, but I was still not able to get it to connect to my network.
My gateway has one dedicated rx channel (right now set to "7"). It sounds like the standard is for 64 channels, but the gateway just does a modulo/7 operation to trim the 64 channels down to 8 (0-8)
Do you know if there is a way to configure the Murata chip to connect only one on channel?