It appears the v33 LBT firmware does not support frequencies below 915 MHz.
LBT is not required for LoRaWAN use in EU868, LoRaWAN uses duty-cycle.
See lines 125-140. The minimum lbt frequency is pulled from the FPGA firmware. A new FPGA firmware may be needed to support LBT for these frequencies.
https://github.com/Lora-net/lora_gateway/blob/master/libloragw/src/loragw_lbt.c
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This reply was modified 1 hour, 4 minutes ago by
Jason Reiss.
