Polly po-cket



Introduce .

This application allows users to manage Base stations to collect information about coordinates, travel direction, quality status … of the Rover that are using the service of Base station.

How does it work?

When this function is enabled on ESPrtk.

Rover will get a NMEA (GPGGA) message from the NMEA output of the RTK receiver, the messages are assigned to the Device ID of the Rover and sent to the Base station.

Base station will collect this data and export to TX_UART0 port.

NMEA news begins with the Devive_ID rover message, followed by 1 (or more) messages that NMEA of the Rover.

It is possible that many Rover will send data to Base at the same time.

The number of Rover is unlimited, depending on the processing speed of ESPrtk Base.

MQTT

With Rover:

  • Collect 1 NMEA (GPGGA) message from RX-UART1 port and send it to the MQTT Broker server (then Broker will send that packet to Base).
  • The minimum update cycle is 0.1 second. (10hz)
  • Unlimited number of Rover.

With Basse:

  • Receive NMEA message from the Rover (sent by MQTT Broker) and then export to TX_UART0 port.

NTRIP

With Rover:

  • Collect 1 NMEA (GPGGA) message from RX-UART1 port and send it to the NTRIP Caster server.
  • The minimum update cycle is 0.1 second .(10hz)
  • Unlimited number of Rover.

Plotting GGA sentences ( NTRIP on SNIP)

Any NMEA-183 GGA sentences sent from your clients can be displayed (plotted) on a Google base map using SNIP‘s built-in map functions as well.   This provides a simplistic AVL functionality.  [Aside:  If you require more advanced AVL recording and reporting, or connections to feed to a 3rd party system, please contact us about the Enterprise edition of SNIP.]

Read more:

 

Wifi TCP (offline)

 

With Rover :

  • Collect 1 NMEA messages (GPGGA)  from RX-UART1 port and send to Base station.
  • Minimum update cycle: 0.1 seconds.(10hz)
  • The largest number of Rover: 20.

With Basse:

  • Receive the NMEA message from the Rover and export to TX_UART0 port.

Wifi UDP (offline)

 

 

With Rover:

  • Collect all NMEA messages from RX-UART1 port and send to Base station.
  • Minimum update cycle: 0.1 seconds.(10hz)
  • The largest number of Rover: 1.

With Basse:

  • Receive the NMEA message from the Rover and export to TX_UART0 port.

Example.

The Note.

When this mode is activated, if Base does not receive any NMEA from Rover, Base will report an error. (However Base still continues to send RTCM as usual)

When activated, if Rover does not receive NMEA from the GNSS receiver, Rover will report an error.(However Rover still continues to stream out RTCM as usual)

Please make sure to enable the GPGGA message at the GNSS output.

NMEA messages need to be separated by a delay of at least 100ms in 1 second.