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. 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.