I have issue with datarate offset when using RX1 window. Everything else is working nicely. I am using LoRa4u II and HeltecV2 boards with LMIC library, both have the same issue.
Thingpark-network uses rx1DrOffset = 2 by default. How to tell that to my boards? Downlinks work nicely in RX2 and in RX1 only when using locked SF12 (because then there is no room for offset).
I can lock my device to SF12 but that is not good practice.
Can someone help me please?