NmeaMessage

Description
Parameter Name	Data Type	Description
message_id	u8 enum	NMEA sentence type. Name Value Description GGA 1 GPS System Fix Data. Source can be the Filter or GNSS1/2 datasets. GLL 2 Geographic Position Lat/Lon. Source can be the Filter or GNSS1/2 datasets. GSV 3 GNSS Satellites in View. Source must be either GNSS1 or GNSS2 datasets. The talker ID must be set to IGNORED. RMC 4 Recommended Minimum Specific GNSS Data. Source can be the Filter or GNSS1/2 datasets. VTG 5 Course over Ground. Source can be the Filter or GNSS1/2 datasets. HDT 6 Heading, True. Source can be the Filter or GNSS1/2 datasets. ZDA 7 Time & Date. Source must be the GNSS1 or GNSS2 datasets. GST 8 Position Error Statistics. Source can be the Filter or GNSS1/2 datasets. MSRA 129 MicroStrain proprietary Euler angles. Source must be the Filter dataset. The talker ID must be set to IGNORED. MSRR 130 MicroStrain proprietary Angular Rate/Acceleration. Source must be the Sensor dataset. The talker ID must be set to IGNORED.
talker_id	u8 enum	NMEA talker ID. Ignored for proprietary sentences. Name Value Description IGNORED 0 Talker ID cannot be changed. GNSS 1 NMEA message will be produced with talker id "GN". GPS 2 NMEA message will be produced with talker id "GP". GALILEO 3 NMEA message will be produced with talker id "GA". GLONASS 4 NMEA message will be produced with talker id "GL".
source_desc_set	u8	Data descriptor set where the data will be sourced. Available options depend on the sentence.
decimation	u16	Decimation from the base rate for source_desc_set. Frequency is limited to 10 Hz or the base rate, whichever is lower. Must be 0 when polling.