Usage of openLRSngDL packet mode
0xf0 [bytes] [data...] [[CRChi] [CRClo]] User data frame to be sent - bytes = 1..48 (or max packet size) - if CRC is enabled CRC16 is required to be present
When packet has been queued for transmission 'ACK' packet is returned
If CRC is enabled and incorrect 'NACK' packet is returned and data discarded.
0xf0 [bytes] [data...] [[CRChi] [CRClo]] User data frame received - bytes = 1..48 - if CRC is enabled CRC16 is appended
0xf0 0x00 [localRSSI] [remoteRSSI] [linkQuality] Idle frame, periodically returned if 'status packet mode is enabled'
0xf0 0xff ACK frame (returned when packet is queued for tx)
0xf0 0xfe NACK frame (returned on CRC failure)