Hello there.
Every time I send an uplink in my TTN gateway with DR6 - SF7BW250 - I receive a MAC command with payload 0350FF0001
03 is ADR command. Next byte 50 binary: 01010000 means that the MSB nibble is 0101 decimal value 5, so DR5 aka SF7BW125.
Using SF7BW250 I realized that it’s used only on one frequency: 868.3. Not so useful. Twice the speed but 8 times less channels - 4 time more collisions than SF7BW125 in 8 channels.
So DR6 is not welcome in LoRaWAN? Better to use it in special cases? Same goes with FSK?