Another alternative that is simpler and only uses the antenna connection for the 868MHz. It doesnt bother with the GPIO connections as there, I see these having very limited use when the module is used as only for LoRaWAN communications with an additional micro that has this already. I did however add the reset pin as this is an easier way to wakeup the module than trying to send break characters to the module.
I have spare PCBs available, UK only for £1 each plus postage.
Enjoy
Andrew