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Reyax RSS8833 Software Manual

Gnss module
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1-Jan-2020 56312E34
RYS8830
RSS8833
GNSS Module Software Guide

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  • Page 1 1-Jan-2020 56312E34 RYS8830 RSS8833 GNSS Module Software Guide...
  • Page 2 Port Number: This depends on your PC system. Baud rate: 115200 Data: 8bit Stop: 1bit Parity: None Flow control: None Read Timeout(sec): Unlimited RtsEnable: False DtrEnable: False Line feed code receive： LF transmit： CR+LF Copyright © 2020, REYAX TECHNOLOGY CO., LTD.
  • Page 3 @GNS 0x** (Set search mode) 01 : GPS 02 : GLONASS 03 : GPS+GLONASS @GCD (Cold start) Please change the operation mode in IDLE mode. And after changing operation mode, please execute Cold start. Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 4: Table Of Contents

    Positioning stop ..............................13 Warm start ................................13 TCXO offset setting ..............................14 GPS test end ................................... 14 Time setting ................................14 GPS test result output ............................15 GPS test start ................................15 Copyright © 2020, REYAX TECHNOLOGY CO., LTD.
  • Page 5 RMC: Recommended Minimum Specific GNSS Data ..................24 VTG: Course Over Ground & Ground Speed ....................... 25 ZDA: Time & Date................................ 26 Operation states ................... Operation modes ..................Normal mode ..................................28 Low power mode ................................. 30 Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 6: Automatic Backup Data Save On/Off

    Please take account to the life of the flash memory when using this function. Argument: Field Description Control automatic backup data save function. arg 1 0: OFF (default value). 1: ON. Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 7: Output Sentence Select

    The receiver position, ephemeris, almanac, TCXO offset and other information required for hot start are included in the backup data, and by saving the backup data in the flash memory using this command, hot start can be initiated when the system is booted from Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 8: Backup Data Clear

    [FER] Done This command is used to erase the program on the flash memory. The RYS8830 re-start after this command issued in special mode. This command must be issued at “Idle” mode. Argument: None Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 9: Gps Almanac Data Acquisition

    (binary data) to the host controller. The GPS ephemeris data size is 3072 bytes. In addition, the data which is actually transferred has the header and footer added. This command must be issued at “Idle” mode. Argument: None Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 10: Gps Ephemeris Data Injection

    The satellite systems used for positioning are set on a bit by bit basis (0: arg 1 system not used, 1: system used). bit 0 : GPS bit 1 : GLONASS bit 2 : SBAS bit 3 : QZSS L1-CA (Default value: 0x01) Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 11: Receiver Position Setting (Ellipsoidal Coordinates)

    RYS8830 prior to hot start using this command. (This is not necessary if the position is backed up in the flash memory.) Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 12: Pps Output Setting

    GPS L1 frequency is acquired. When getting TCXO frequency offset, this value must be multiplied by (-1 * Nominal frequency of TCXO) / 1575420000. When the TCXO offset has not been calculated, the text “INVALID” returns. Argument: None Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 13: Operation Mode Setting

    // (The pattern of a sleep time of 5 seconds and the // positioning operation of 5 seconds is repeated.) @GSOP 2 30000 0<CR><LF> // Low power mode, positioning cycle of 30 seconds Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 14: Hot Start For Position Accuracy

    @GSW This command is used to start positioning using a warm start. When the conditions for the warm start have not been met, positioning is started automatically using a cold start. Argument: None Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 15: Tcxo Offset Setting

    RYS8830 prior to hot start using this command. Argument: Field Description arg 1 This specifies the UTC time (year) using an integer. arg 2 This specifies the UTC time (month) using an integer. Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 16: Gps Test Result Output

    Reserved． Always specify “0” for this. arg 3 Reserved． Always specify “0” for this. arg 4 Reserved． Always specify “0” for this. Examples of commands: @GTS 1 0 0 0<CR><LF> // The test is started using satellite no.1. Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 17: Positioning Algorithm Setting

    The GLONASS almanac data size is 576 bytes. In addition, the data which is actually transferred has the header and footer added. This command must be issued at “Idle” mode. Argument: None Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 18: Glonass Almanac Data Injection

    RYS8830. The GLONASS ephemeris data size is 1152 bytes. In addition, the data which is actually required has the header and footer added. This command must be issued at “Idle” mode. Argument: None Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 19: Sleep

    When this command has been issued in the Sleep state, the command reply message is not output until the transfer to the Idle state is completed. Repeatedly issue this command until the command reply message is output. Argument: None Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 20: Nmea Sentence Specifications

    2：Fix valid, Differential GPS 6 : Dead reckoning Number of satellites in use HDOP Altitude (mean-sea-level), x.x,M meters Geoidal separation, meters x.x,M Age of DGPS data NULL Differential reference station xxxx NULL Checksum Termination <CR><LF> Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 21: Gll : Geographic Position - Latitude / Longitude

    A : Data valid, V : Data not valid Positioning system Mode Indicator : Mode Indicator A : Autonomous mode D : Differential mode E : Dead reckoning mode N : Data not valid Checksum Termination <CR><LF> Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 22: Gns: Gnss Fix Data

    E : Dead reckoning mode N : Data not valid Number of satellites in use HDOP Altitude (mean-sea-level) x.x,M Geoidal separation, meters x.x,M Age of DGPS data Differential reference station xxxx NULL Checksum Termination <CR><LF> Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 23: Gsa: Gnss Dop And Active Satellites

    2D / 3D Mode A : Automatically switch 2D / 3D Mode 1 : Fix not available, 2 : 2D, 3 : 3D Used satellite #1 Used satellite #12 PDOP HDOP VDOP Checksum Termination <CR><LF> Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 24: Gsv: Gnss Satellites In View

    [dB-Hz] (NULL at no acquisition) Satellite ID Elevation [degree] Azimuth [degree] SNR (C/N) [dB-Hz] (NULL at no acquisition) Satellite ID Elevation [degree] Azimuth [degree] SNR (C/N) [dB-Hz] (NULL at no acquisition) Checksum Termination <CR><LF> Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 25: Rmc: Recommended Minimum Specific Gnss Data

    Magnetic variation – E/W E : East, W : West A : Autonomous mode Mode Indicator D : Differential mode E : Dead reckoning mode N : Data not valid Checksum Termination <CR><LF> Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 26: Vtg: Course Over Ground & Ground Speed

    Speed over ground x.x,N [knot] Speed over ground x.x,K [km/h] A : Autonomous mode Mode Indicator D : Differential mode E : Dead reckoning mode N : Data not valid Checksum Termination <CR><LF> Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 27: Zda: Time & Date

    QZ : Using only QZS for positioning GN : Using combined satellite systems for positioning Sentence ID hhmmss.ss hh [hour] mm [min] ss.ss [sec] Month Year xxxx Local zone hours NULL Local zone minutes NULL Checksum Termination <CR><LF> Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 28: Operation States

    Transitions from one state to another can be initiated by issuing commands from the host controller. When GPS has started positioning and the Low Power mode has been selected as the operation mode, the receiver state is being selected automatically to minimize the power consumption. Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 29: Operation Modes

    The RYS8830 works continuously with all GPS circuits activated and outputs NMEA sentences with the specified period by @GSOP as shown in Fig. NMEA sentence is output immediately after the first fix, then NMEA sentence is output with the specified period again from that point. Copyright © 2020, REYAX TECHNOLOGY CO., LTD.
  • Page 30 RYS8830 also continues to work at the Exec state until position fixed. On the other hand, when the operating time is equal or more than 60sec, the RYS8830 works by alternating between Sleep and Exec in the specified period as shown in Fig Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

  • Page 31: Low Power Mode

    When the position is fixed and the condition of receiving signals reaches a certain level, the RYS8830 transits to the intermittent operation from next period as shown in Fig. Taiwan: sales@reyax.com China: sales@reyax.com.cn http://reyax.com Copyright © 2020, REYAX TECHNOLOGY CO., LTD.

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Rys8830

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