User manual MODULESTEK MG-ST01SP

[. . . ] 7 3. 1 MG-ST01SP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BOARD CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPLICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCHEMATICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 www. modulestek. com 3 No. 208, Jhengkang 1st St. , Taoyuan City, Taoyuan County 330, Taiwan TEL:+886-3-3311143 FAX:+886-3-3316751 Key Modules For Your Success 1. TIntr oductionT 1. 1. [. . . ] Schematics www. modulestek. com 9 No. 208, Jhengkang 1st St. , Taoyuan City, Taoyuan County 330, Taiwan TEL:+886-3-3311143 FAX:+886-3-3316751 Key Modules For Your Success Appendix A: GENERAL NMEA FORMAT The general NMEA format consists of an ASCII string commencing with a `$' character and terminating with a <CR><LF> sequence. NMEA standard messages commence with `GP' then a 3-letter message identifier. The message header is followed by a comma delimited list of fields optionally terminated with a checksum consisting of an asterisk `*' and a 2 digit hex value representing the checksum. There is no comma preceding the checksum field. When present, the checksum is calculated as a bitwise exclusive of the characters between the `$' and `*'. As an ASCII representation, the number of digits in each number will vary depending on the number and precision, hence the record length will vary. Certain fields may be omitted if they are not used, in which case the field position is reserved using commas to ensure correct interpretation of subsequent fields. The tables below indicate the maximum and minimum widths of the fields to allow for buffer size allocation. www. modulestek. com 10 No. 208, Jhengkang 1st St. , Taoyuan City, Taoyuan County 330, Taiwan TEL:+886-3-3311143 FAX:+886-3-3316751 Key Modules For Your Success $GPGGA This message transfers global positioning system fix data. The $GPGGA message structure is shown below: Field Message ID UTC Time Latitude N/S Indicator Longitude E/W indicator Position Fix Indictor Satellites Used HDOP MSL Altitude Units Geoid Separation Units Age of Differential Corrections Diff Reference Corrections Checksum Message terminator *xx <CR> <LF> (0) 3 2 3 2 2 digits. Char int 1 (0) 1 1 5 M Stands for "meters". Age in seconds Blank (Null) fields when DGPS is not used. Int Float Float Char Int 2 1. 1 1. 1 1 (0) 1 2 3. 1 5. 1 1 4 Int 1 1 0: Fix not available or invalid. Number of satellites used to calculate fix. Altitude above mean seal level M Stands for "meters". Format $GPGGA hhmmss. sss float char float Char Min chars 6 2, 2, 2. 3 3, 2. 4 1 3, 2. 4 1 6 2, 2, 2. 3 3, 2. 4 1 3, 2. 4 1 Max chars Notes GGA protocol header. N=north or S=south Degree * 100 + minutes. E=east or W=west www. modulestek. com 11 No. 208, Jhengkang 1st St. , Taoyuan City, Taoyuan County 330, Taiwan TEL:+886-3-3311143 FAX:+886-3-3316751 Key Modules For Your Success $GPGLL This message transfers Geographic position, Latitude, Longitude, and time. The $GPGLL message structure is shown below: Field Message ID Latitude N/S Indicator Longitude E/W indicator UTC Time Status Format $GPGLL Float Char Float Character hhmmss. sss Char Min chars 6 1, 2. 1 1 1, 2. 1 1 1, 2, 2. 1 1 6 3, 2. 4 1 3, 2. 4 1 2, 2, 2. 3 1 Max chars Notes GLL protocol header. Mode Indicator Checksum Message terminator Char *xx <CR><LF> 1 (0) 3 2 1 3 2 A Autonomous 2 digits. ASCII 13, ASCII 10. www. modulestek. com 12 No. 208, Jhengkang 1st St. , Taoyuan City, Taoyuan County 330, Taiwan TEL:+886-3-3311143 FAX:+886-3-3316751 Key Modules For Your Success $GPGSA This message transfers DOP and active satellites information. The $GPGSA message structure is shown below: Field Message ID Mode Format $GPGSA Char Min chars 6 1 6 1 Max chars Notes GSA protocol header. M Manual, forced to operate in selected mode. [. . . ] Signal to noise ration in dBHz, null if the sv is not in tracking. Checksum Message terminator *xx <CR> <LF> (0) 3 2 3 2 2 digits. ASCII 13, ASCII 10. www. modulestek. com 14 No. 208, Jhengkang 1st St. , Taoyuan City, Taoyuan County 330, Taiwan TEL:+886-3-3311143 FAX:+886-3-3316751 Key Modules For Your Success $GPRMC This message transfers recommended minimum specific GNSS data. The $GPRMC message format is shown below. [. . . ]