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2020, REYAX TECHNOLOGY CO., LTD.

RYS8830 RYS8833

`GNSS Module Software Guide

NMEA sentence specifications

This section describes the specifications of NMEA sentences. RYS8830 outputs NMEA0183 compliant

sentences, IMES sentences and proprietary sentences whose talker ID is “$PS”.

GGA : Global Positioning System Fix Data

Format:$--GGA,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x,xx,x.x,x.x,M,x.x,M,x.x,xxxx*hh

<CR><LF>

Field

Format

Description

Header

Talker ID

Sentence ID

GGA

UTC of position

hhmmss.ss

hh [hour] mm [min] ss.ss [sec]

Latitude

llll.ll

dd [degree] mm.mmmm [min]

Latitude

–

N/S

N : North latitude, S : South latitude

Longitude

yyyyy.yy

ddd [degree] mm.mmmm [min]

Longitude

–

E/W

E : East longitude, W : West longitude

Quality indicator

：

Fix not available

：

Fix valid

：

Fix valid, Differential GPS

6 : Dead reckoning

Number of satellites in use

HDOP

x.x

Altitude (mean-sea-level),
meters

x.x,M

[m]

Geoidal separation, meters

x.x,M

[m]

Age of DGPS data

x.x

NULL

Differential reference station
ID

xxxx

NULL

Checksum

*hh

Termination

Содержание RSS8833

Страница 1: ...RYS8830 RSS8833 1 Jan 2020 56312E34 GNSS Module Software Guide...

Страница 2: ...merSetup exe Please open a dialog window by selecting Setup S Serial Port S Then you should put following parameter on the window Port Number This depends on your PC system Baud rate 115200 Data 8bit...

Страница 3: ...IDLE mode GSTP Command input procedure In the case of use communication terminal software other than a GNSS monitor positioning operation will be started if a command is inputted below It is required...

Страница 4: ...tion 8 10 Cold start 8 11 GPS ephemeris data acquisition 8 12 GPS ephemeris data injection 9 13 Positioning use satellite setting 9 14 Receiver position setting ellipsoidal coordinates 10 15 Receiver...

Страница 5: ...17 33 Sleep 18 34 Firmware revision number acquisition 18 35 Wake up 18 NMEA sentence specifications 19 1 GGA Global Positioning System Fix Data 19 2 GLL Geographic Position Latitude Longitude 20 3 GN...

Страница 6: ...ata save ON OFF Syntax Response ABUP arg 1 ABUP Done This command is used to control the automatic backup data save function When 1 is specified for the argument the backup data contents are saved in...

Страница 7: ...ut NMEA sentence bit0 GGA bit1 GLL bit2 GSA bit3 GSV bit4 GNS bit5 RMC bit6 VTG bit7 ZDA bit8 Reserved bit9 Reserved bit10 Reserved bit11 Reserved bit12 Reserved bit13 Reserved bit14 Reserved bit15 Re...

Страница 8: ...sure that the Done response is received at the original baud rate When the command has failed the original baud rate is not changed In the default status the baud rate is set to 115200 bps Argument Fi...

Страница 9: ...YS8830 Transmit the GPS almanac data binary data following the Ready response from the RYS8830 The GPS almanac data size is 2048 bytes In addition the data which is actually required has the header an...

Страница 10: ...3 Positioning use satellite setting Syntax Response GNS GNS Done This command is used to select the satellite systems to be used for positioning The satellite systems are assigned to the bits of the a...

Страница 11: ...conds of the receiver using an integer arg 4 This specifies the longitude degrees of the receiver using an integer arg 5 This specifies the longitude minutes of the receiver using an integer arg 6 Thi...

Страница 12: ...S arg 1 GPPS Done This command is used to control 1PPS output When 1PPS output is enabled timing pulse is output in 1 sec period from 1PPS output port after clock information being received from GNSS...

Страница 13: ...p time must be kept certainly set the parameters so that the operation time may be 1 minute or more When the Low power mode is used set the positioning cycle to the value over 30sec Argument Field Des...

Страница 14: ...d is used to start positioning using a hot start The TTFF is prioritized until first fix TTFF is about 1s shorter than GSP but the position accuracy is somewhat worse than GSP There is no difference w...

Страница 15: ...ples of commands GTCX 250 CR LF TCXO offset 250Hz GTCX 100 CR LF TCXO offset 100Hz 24 GPS test end Syntax Response GTE GTE Done This command is used to end the GPS test When the test is ended using th...

Страница 16: ...nd is issued and then issue the command The CN level and Doppler frequency are returned as the test results Argument None 27 GPS test start Syntax Response GTS arg 1 arg 2 arg 3 arg 4 GTS Done This co...

Страница 17: ...ging the receiver by thehand bit 1 reserved always specify 0 for this bit 2 reserved always specify 0 for this bit 3 reserved always specify 0 for this bit 4 reserved always specify 0 for this bit 5 r...

Страница 18: ...acquire the GLONASS ephemeris data which has been received by RYS8830 When the command is received the RYS8830 transmits the GLONASS ephemeris data binary data to the host controller The GLONASS ephe...

Страница 19: ...n Reboot Argument Field Description arg 1 This selects whether to transfer to the Sleep state or Deep Sleep state 0 Transfer to Sleep 0 1 Transfer to Sleep 1 2 Transfer to Sleep 2 34 Firmware revision...

Страница 20: ...Field Format Description Header Talker ID GP Sentence ID GGA UTC of position hhmmss ss hh hour mm min ss ss sec Latitude llll ll dd degree mm mmmm min Latitude N S a N North latitude S South latitude...

Страница 21: ...S for positioning GN Using combined satellite systems for positioning Sentence ID GLL Latitude llll ll dd degree mm mmmm min Latitude N S a N North latitude S South latitude Longitude yyyyy yy ddd deg...

Страница 22: ...UTC of position hhmmss ss hh hour mm min ss ss sec Latitude llll ll dd degree mm mmmm min Latitude N S a N North latitude S South latitude Longitude yyyyy yy ddd degree mm mmmm min Longitude E W a E...

Страница 23: ...output on the line of GPS SVIDs are over 193 Format GSA a x xx xx xx xx xx xx xx xx xx xx xx xx x x x x x x hh CR LF Field Format Description Header Talker ID GP Using only GPS for positioning GL Usi...

Страница 24: ...Total number of sentences x Sentence number x Total number of satellites in view xx SV1 Satellite ID xx Elevation xx degree Azimuth xxx degree SNR C N xx dB Hz NULL at no acquisition SV2 Satellite ID...

Страница 25: ...for positioning Sentence ID RMC UTC of position fix hhmmss ss hh hour mm min ss ss sec Status A A Data valid V Data not valid Latitude llll ll dd degree mm mmmm min Latitude N S a N North latitude S S...

Страница 26: ...ly GPS for positioning GL Using only GLONASS for positioning QZ Using only QZS for positioning GN Using combined satellite systems for positioning Sentence ID VTG Course over ground True x x T degrees...

Страница 27: ...rmat Description Header Talker ID GP Using only GPS for positioning GL Using only GLONASS for positioning QZ Using only QZS for positioning GN Using combined satellite systems for positioning Sentence...

Страница 28: ...et value etc are stored are retained so the conditions required for hot start are retained After wakeup the program is rebooted Sleep 2 In this state the power of all the blocks except for the real ti...

Страница 29: ...time with each positioning cycle and the positioning operation is performed continuously for the remaining time of the positioning cycle Low Power In this mode the positioning operation is performed a...

Страница 30: ...the rest of the time When the time subtracting sleep time from positioning cycle that is operating time is under 60sec the RYS8830 continues to work at the Exec state until position fixed as shown in...

Страница 31: ...certain level the RYS8830 transits to the intermittent operation from next positioning cycle to achieve low power consumption The RYS8830 works by alternating between Sleep the positioning cycle 15se...

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