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Display

Here the the various icons and different state displays are explained in depth.

Rover​

The basic rover display

A basic rover display

The display on the FPM-T in rover mode will show the following:

  • A142 - Bluetooth MAC address used during pairing to identify the device. This is also printed on the side of the device as part of the Device ID.
  • Battery Gauge - Relative level of battery capacity remaining from 100% (three bars) to nearly exhausted (no bars).
  • Cross Hair - Estimated horizontal positional accuracy of the device in meters. A single cross hair icon indicates a standard 3D fix; a blinking double cross hair icon indicates RTK Float; a solid double cross hair icon indicates an RTK Fix.
  • Satellite Dish - Satellites in view. Used as a general indicator of how well the device is receiving GNSS signals. This varies between 20 to 40 satellites.
  • Spinning Circle - This animated icon indicates the system is running.

A rover with RTK Fix no logging

A rover with RTK Fix and logging

As devices are connected, and corrections are received, the display will indicate additional information:

  • A142 - Bluetooth MAC address used during pairing to identify the device. This is also printed on the side of the device as part of the Device ID.
  • Bluetooth Symbol - A remote device is currently connected to the FPM-T over Bluetooth.
  • Down Arrow - Correction data is detected. This is a good indicator that RTCM is correctly being received.
  • Battery Gauge - Relative level of battery capacity remaining from 100% (three bars) to nearly exhausted (no bars).
  • Double Cross-Hair - Estimated horizontal positional accuracy of the device in meters. A solid double cross hair icon indicates an RTK Fix.
  • Satellite Dish - Satellites in view. Used as a general indicator of how well the device is receiving GNSS signals. This varies between 20 to 40 satellites. A satellite dish with a 'P' indicates PPP reception is enabled.
  • Bluetooth Symbol in Lower Right Corner - Corrections can come from a variety of sources. This icon indicates the corrections being used by the GNSS receiver. In this case, corrections over Bluetooth are being used.
  • Document - This animated icon indicates data is being logged to microSD.

Logging​

All the logging icons that can appear

The possible logging types on the FPM-T

The FPM-T can log various messages to microSD. Different messages can be enabled for different intents. This icon will change indicating the source currently being used.

  • Circle - No microSD card is detected / no logging enabled.
  • Document with Lines - The FPM-T is logging the default set of NMEA messages.
  • Document with C - The FPM-T is logging a custom, user selected set of messages.
  • Document with P - The FPM-T is logging the default set of NMEA and RTCM messages needed for post processing.

See the Message Rate Configuration section for information about how to log different messages.

Correction Source​

All the icons that can appear from correction sources

The possible correction sources on the FPM-T

The FPM-T can receive corrections from a variety of sources. It will use the corrections from the highest prioritized source (see Correction Priorities for more information). This icon will change indicating the source currently being used.

  • Handheld Radio - An external radio is providing corrections.
  • Sideways Half Circles - The ESP-NOW radio is providing corrections.
  • Broadcast Tower - The LoRa radio is providing corrections.
  • Bluetooth - The Bluetooth radio is providing corrections.
  • USB - A USB connection radio is providing corrections.
  • Double Diamond - An NTRIP Client is providing corrections.
  • P Sign - The PPP HAS/B2b system is providing corrections.

Base​

A base xmitting

A base transmitting

  • A142 - Bluetooth MAC address used during pairing to identify the device. This is also printed on the side of the device as part of the Device ID.
  • WiFi Symbol - WiFi is running. This icon will blink while a connection is being attempted and will be solid when WiFi is connected.
  • Fort - Indicates the device is in fixed base mode. A flag icon indicates the device surveyed-in the base.
  • Battery Gauge - Relative level of battery capacity remaining from 100% (three bars) to nearly exhausted (no bars).
  • Xmitting - Indicates the device is successfully transmitting RTCM over the available interfaces. This includes ESP-NOW, TCP, LoRa, and any serial connections, it excludes NTRIP Server.
  • RTCM - A count of RTCM sentences transmitted. Used as a heath indicator: it should generally increase every second.
  • Satellite Dish - Satellites in view. Used as a general indicator of how well the device is receiving GNSS signals. This varies between 20 to 40 satellites.
  • IP Address - Once a device is connected to WiFi, its IP address will be shown. This is helpful when using a TCP Client to connect to the device.
  • Spinning Circle - This animated icon indicates the system is running.

A base casting

A base casting

  • A142 - Bluetooth MAC address used during pairing to identify the device. This is also printed on the side of the device as part of the Device ID.
  • WiFi Symbol - WiFi is running. This icon will blink while a connection is being attempted and will be solid when WiFi is connected.
  • Up Arrow - Correction data is sent. This is a good indicator that RTCM is correctly being uploaded.
  • Fort - Indicates the device is in fixed base mode. A flag icon indicates the device surveyed-in the base.
  • Battery Gauge - Relative level of battery capacity remaining from 100% (three bars) to nearly exhausted (no bars).
  • Casting - Indicates the device is successfully connected to a Caster over WiFi. This is what to expect to see when the NTRIP Server is successfully running.
  • RTCM - A count of RTCM sentences transmitted. Used as a heath indicator: it should generally increase every second.
  • Satellite Dish - Satellites in view. Used as a general indicator of how well the device is receiving GNSS signals. This varies between 20 to 40 satellites.
  • IP Address - Once a device is connected to WiFi, its IP address will be shown. This is helpful when using a TCP Client to connect to the device.
  • Spinning Circle - This animated icon indicates the system is running.

Type​

All the icons that can appear based on Base type

The possible base types on the FPM-T

The FPM-T can enter base mode in Fixed or Survey-In. This icon will change indicating the base type currently being used.

  • Fort - The base is using fixed coordinates.
  • Flag - The base is using surveyed-in coordinates.

Display showing menu system

The display menu system

Pressing either button will open the menu system. Pressing the (Fn) button will move down; pressing the () power button will select the menu item. The menu will timeout and exit if no entry is made.

  • Base - Enter Base mode as it has been configured.
  • BaseCast - Override the base configuration and enter Base Casting mode.
  • BaseAssist - Override the base configuration and enter Base Assist mode.
  • Rover - Enter Rover mode as it has been configured.
  • Config - Enter Configuration mode.

Display showing profiles

Profiles on the display menu

  • E-Pair - Enter ESP-NOW pairing mode.
  • 0_Aplin - Any named profiles will be shown on the menu list. This allows a user to quickly switch entire system configurations for different work sites.
  • Exit - Exit the menu system.

Configuration​

WiFi AP Configuration

A device in Access Point configuration mode

Once a device is put into configuration mode the display will show the SSID being broadcast as well as the IP address. By default, the FPM-T will broadcast an access point called RTK Config ###### with the IP address 192.168.4.1.

WiFi AP Configuration

A device in WiFi configuration mode

If Configure Mode is set to WiFi the FPM-T will attempt to connect to the given WiFi network. If a connection is made, its SSID will be shown along with the IP address that was issued to the FPM-T.