Use a longer preamble and 32-bit detector for the 100 kbps fixed 6-byte GMSK profile.
Read RX payloads from the RxStartBufferPointer returned by GetRxBufferStatus. The previous subtract-by-length adjustment could read the previous FIFO slot once the continuous RX buffer advanced, causing duplicate and missing packet IDs on the gateway.
Change the fixed 6-byte GMSK helper default to 434.18 MHz so new GMSK traffic does not share the existing 433.10, 433.45, and 433.90 MHz LoRa channels.
Add a fixed 6-byte 100 kbps GMSK profile matching the health-band telemetry packet, plus FSK packet-status helpers for RSSI and error checks. Expose instantaneous RSSI reads for CCA and image calibration for 430-440 MHz GFSK bring-up.
crosstyan