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    Configuring GNSS and Location Reports

    RX Series routers are equipped with location tracking, enabling you to track the movements of a vehicle or other devices that move. The router relays the information of its location as well as other data for use with tracking applications.

    Common uses for location reporting include:

    • Driver navigation: The router provides real-time location data via the serial or Ethernet port to a local application, including applications that provide mapping and navigation support.
    • Computer-Aided Dispatch/Automatic Vehicle Location (CAD/AVL): The router provides real-time location data to the server that tracks the location and other variables of the vehicle or asset.

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    Supported Location Report Protocols

    • National Marine Electronics Association (NMEA®): NMEA is an ASCII protocol used by many location tracking applications.

    • Trimble® ASCII Interface Protocol (TAIP): TAIP is a digital communication interface based on printable ASCII characters over a serial data link. TAIP was designed specifically for vehicle tracking applications but has become common in a number of other applications, such as data terminals and portable computers, because of its ease of use.

    Hardware Requirements

    Ensure that a GNSS antenna is connected to the router. See the RX55 Hardware Guide for installation and antenna connection instructions. For compatible antennas sold by Sierra Wireless, see our website.

    After starting up the router, check the GNSS LED to confirm GNSS operation. The GNSS LED will be red while searching for a fix. After getting a fix, it is yellow (Dead Reckoning is enabled but not calibrated) or green (Dead Reckoning is calibrated or disabled). Dead Reckoning enhances vehicle tracking when satellite GNSS service is impeded or unreliable.

    See this page for full LED information.

    GNSS is the evolution of GPS. GPS uses only a single constellation of satellites, while GNSS uses signalling from up to 4 constellations to provide a more reliable and accurate location fix.

    Enabling Location

    Under Services > Location > General, ensure that GNSS ENABLE is On.

    GNSS is enabled by default, and begins working when the router is powered on with a GNSS antenna connected. GNSS status is reported under GNSS STATE, and can include the following status messages:

    • Starting
    • Device Unavailable
    • Waiting For New Fix
    • Location Fix Acquired

    For fine tuning GNSS, you can configure the settings listed below:

    SETTING DESCRIPTION RANGE DEFAULT
    GNSS ANTENNA BIAS Optimize the router for the type of connected GNSS antenna

    On (required for active GNSS antenna)

    Off (compatible only for passive GNSS antenna)

    		 On

    Configuring Location Reports

    Under Location > Reporting:

    • Enter the TAIP ID (used for TAIP reports; not required for NMEA). This can be any four-character alphanumeric string as per the TAIP standard.
    • Select the NMEA DEVICE ID (PROPRIETARY SENTENCE) (used for NMEA reports; not required for TAIP). Allows use of the router Serial Number or Custom ID (1 to 50 characters) in local IP NMEA reports to identify a device/vehicle. Including the device ID is especially useful when your devices have dynamic IP addresses.
      • After selecting Custom ID, you must enter the ID in the CUSTOM ID field.

    Local Reporting

    Local reports are sent via UDP to an IP address on the LAN. For Local Reporting, configure the following:

    • Service: UDP Broadcast or UDP Multicast. UDP Multicast needs a Destination IPv4 address.
    • Destination IPv4 Address (Multicast Only): To send the location report(s) to a local LAN client, enter the address here. If there is more than one local client, it is advisable to set up a DHCP reservation or set a static IP address on the client.
    • Destination Ports: Enter the port on which the CAD/AVL application is configured to receive data (65278 is the default). The port should be available from your CAD/AVL administrator or application documentation.
    • Destination LAN Segments: Enter the LAN bridges (network segments) for multiple clients. If you have multiple clients that require the location reports, you can send reports to each client on a particular LAN bridge (network segment).
    • Reporting Interval: Sets how frequently (in seconds; 5 seconds by default) the location report is sent to the LAN or IPv4 destination.

    • Report Type: Select the report type (or protocol, as described above).

      • NMEA
      • TAIP PV report: TAIP location report that contains PV (Position/Velocity Solution) messages
      • TAIP CP report: TAIP location report that contains CP (Compact Position Solution) messages
      • TAIP LN report: TAIP location report that contains a long navigation message
      • TAIP TM report: TAIP location report that contains the time and date

    • Sentences: If the report type is NMEA, you can select the desired combination of GGA, GSA, RMC, VTG, and GSV sentences, along with the Proprietary Device ID. Some typical sentences are below.

      • GGA+VTG: NMEA location report that contains fix information, vector track, and speed over ground
      • GGA+VTG+RMC: NMEA location report that contains fix information, vector track, speed over ground, and recommended minimum location data
      • GGA+VTG+RMC+GSA+GSV: NMEA location report that contains fix information, vector track, speed over ground, the recommended minimum location data, overall satellite data, and detailed satellite data

    Remote Reporting

    For Remote Reporting, configure the following REMOTE REPORTING SERVER settings, as applicable:

    • Protocol: TCP or UDP
    • Destination Hostname or IP - IP address or FQDN (fully qualified domain name) of the server where location reports are sent. Example: 192.100.100.100. The IP address can be for a local host or a remote server that is accessed over-the-air or via a VPN tunnel. If an IP with the last octet of 255 is configured (i.e. 192.168.13.255), a report would be broadcast to all IPs on that subnet. When configured to a local host subnet, any connected device would receive the report. Note: If you want to use it as a LAN device, it must have a private IP address. If you want to use a public IP address, use a Local IP report.
    • Destination Port: Destination port on the server where location reports are sent. The destination port can be the same for all servers or you can configure a different destination port for each server. Range: 1–65535 (default for the first server is 22335).
    • Reporting Interval: - Sets how frequently (in seconds; 5 seconds by default) the location report is sent to the IPv4 destination
    • Report Type: Select the report type (or protocol, as described above).
      • NMEA
      • TAIP PV report: TAIP location report that contains position and velocity
      • TAIP CP report: TAIP location report that contains the compact position
      • TAIP LN report: TAIP location report that contains a long navigation message
      • TAIP TM report: TAIP location report that contains the time and date
    • Sentences: For NMEA reports, you can select the desired combination of GGA, GSA, RMC, VTG, and GSV sentences, along with the Proprietary Device ID. Some typical sentences are below.
      • GGA+VTG: NMEA location report that contains fix information, vector track, and speed over ground
      • GGA+VTG+RMC: NMEA location report that contains fix information, vector track, speed over ground, and recommended minimum location data
      • GGA+VTG+RMC+GSA+GSV: NMEA location report that contains fix information, vector track, speed over ground, the recommended minimum location data, overall satellite data, and detailed satellite data

    Forwarding Local Reports to the Serial Port

    It is possible to send reports via the RJ45 Serial port on the router using the default destination local IP address (192.168.1.1) and then setting the Serial port in PAD mode to listen and forward to the serial port. This configuration is useful in cases where local serial forwarding is used for sending reports to laptops in docking stations in a service vehicle.

    The destination local IP address can be modified from default, so it should be checked under Networking > Zones settings > LAN Segments.

    To configure sending local reports to the Serial Port:

    1. Under Location > Reporting > LOCAL REPORTING, configure Local Reporting for UDP Multicast using the destination local IP address, for example 192.168.1.1.

    2. Go to Hardware Interfaces.

    3. Under Serial Interfaces > Configuration, set the MODE for Port 1 to PAD.

    4. Under PAD Settings, configure Port 1 as follows:

      • PAD MODE: UDP
      • LISTEN FOR CONNECTIONS (AUTO-ANSWER): On
      • LISTENING PORT and DESTINATION PORT: Same port configured in Step 1
      • DESTINATION ADDRESS: Same Destination IP Address used in Step 1. For example 192.168.1.1.

      The receiving application may have additional requirements for reducing the BAUD rate or configuring other flow control parameters. Consult the documentation from the application vendor for details.

    5. Click SAVE.

      To confirm operation, open the CAD/AVL listening application on your computer and confirm that messages are being received and understood.

    Sending GPIO State Information

    You can send GPIO status along with device location to an MQTT server using the Telemetry reporting feature, under Telemetry > Custom Reports.

    There are no default GPIO reports.

    To create a report to send GPIO and location information to an MQTT server:

    1. Go to Telemetry > General, turn on SERVICE.

    2. Go to Telemetry > Custom Reports.

    3. Under REPORT TITLE, enter a report name.

    4. Under REPORT MODE, select one of the MQTT options: MQTT or ALMS and MQTT.

    5. Under MQTT TOPIC REPORT NAME, enter a report name. In the below image, the report is named avgpi (AirVantage General Purpose Inputs).

    6. Under REPORT CONTENT, select GPIO ARA from the list.

      GPIO ARA consists of the following data points:

      • atp.glon: GPS longitude (decimal degrees)
      • atp.glat: GPS Latitude (decimal degrees)
      • atp.ghed: GPS Heading (decimal degrees)
      • atp.gpi: GPIO Input Cumulative, which is a binary report of all five GPIO data points:
        • Primary GPIO Input (on power connector) 0th bit: atp.pgpio
        • GPIO Input 2 bit position 1: atp.gpio2
        • GPIO Input 3 bit position 2: atp.gpio3
        • GPIO Input 4 bit position 3: atp.gpio4
        • GPIO Input 5 bit position 4: atp.gpio5
          Example: GPIO Input Cumulative is calculated as follows:
          • Primary GPIO Input: true
          • GPIO Input 2: true
          • GPIO Input 3: false
          • GPIO Input 4: true
          • GPIO Input 5: false
            Therefore GPIOInputCumulative is 01011 which equals hexadecimal 0x0B which equals decimal 11.

    7. To generate a report on state change of one of the GPIO inputs, go to Unconditional Triggers and turn on ENABLE and select the GPIO report under GENERATE THIS REPORT….

    8. Set the AT EVERY SAMPLE OF… to GPIO Input Cumulative.

    9. Click SAVE.

    10. Under Telemetry > MQTT, configure the connection to your MQTT server.

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