I have a gateway at the edge of range from an RN2903, and have found the gateway can hear uplinks at DR0 (SF10/125kHz), but the RN2903 isn’t receiving the downlinks because they are being sent at DR10(SF7/500). The downlink should be at DR8(SF12/500kHz).
I’ve tried setting RX1DROffset in the config file at every setting from 0 to 15 without success.
Plus, I can’t make sense of the RX1DROffset settings from LorRaWAN 1.0.2 Regional Parameters section 2.2.7 page 16, table 16.
Does [0:3] mean decimal 0 to 3, or 4 bits or what? I tried unsuccessfully to find the code in LoraServer where the downlink datarate is calculated, to hopefully get a hint.
What am I missing?