Base Mode

RoboDot starts up in base mode by default. It will automatically search for and set an estimated base position if "auto survey" is enabled in the settings page.

Setting a base point - Absolute Positioning

Use a known base position or a Fixed VRS solution when your measurements must match an external coordinate reference. Confirm the datum and height reference before entering coordinates.

1. Manual Entry:
   • Enter coordinates in Status Page, Set Position Field
   • Format: DD.dddd or DD MM SS using
     • Use negative latitude for south and negative longitude for west
     • To convert from state plane to degrees, use NOAA's NCAT tool.
   • Enter pole height
     • Distance from the ground to the bottom of RoboDot
   • Select "Set as Entered"
2. With a VRS Solution:

Automatic Method

https://youtu.be/Laq7GVW0X1w

- Configure hotspot and VRS credentials
- Enable: Connect on Boot (Wi-Fi)
- Enable: Auto Connect (VRS)
- Enable: Auto Survey
- Restart device with
    - Have a Wi-Fi Hotspot active

Manual Method

- Place RoboDot

Via Web UI
-     Connect to Wi-Fi and VRS in the Web UI Settings
-     Verify Fixed solution status
-     Use Position > Average from GPS
Via Screen UI
-     In the GNSS Screen press Survey

- Device disconnects from VRS when complete

Setting a base point- Relative Positioning

1. Manual
   1. Click "Average from GPS" in Status Page, Set Position Field
   2. Position quality depends on the fix quality at hand
2. Automatic
   1. Enable "Auto Survey" in Web UI Settings

Releasing

If the base has moved, or to enable a new base position after the base has been surveyed in, use the Set Position form on the Web UI status page select "Release Position".

Alternatively press "Release" in the GNSS touch screen.

Sending corrections

RoboDot can send RTCM3 corrections to rovers in these ways:

1. Over the WIFI network NTRIP caster
2. Over Lora radio if installed and enabled in the settings page
3. Over the USB to serial port.

RTCM message format — MSM4 / MSM7

The base sends MSM4 by default to keep correction traffic smaller. If your rover requires MSM7, select Settings → Advanced → RTCM Messages and check the rover’s supported format.

• MSM7 messages are roughly 1.6× the size of MSM4 — relevant on LoRa links and slow hotspots.
• The local caster's mount point name follows the selection (RTCM3_MSM4 or RTCM3_MSM7), so connected rovers can see at a glance what is being served.

Using and Saving Known Points

Save known base points to reuse their coordinates on later visits.

Saving Methods

1. Open Reference Points in the web UI.
2. Use Save Current Position, copy a job point, or enter known coordinates and ground height.
3. Enter an identifier and use Save Reference Point when entering coordinates manually. Confirm the point appears in the list.

Using Saved Positions

1. Place RoboDot at location
2. Open Reference Points
3. Select desired position by identifier
4. Enter pole height (distance from ground to RoboDot bottom)
5. Click Set as Base

NTRIP connections

When a Client/Rover/Drone connects to RoboDot for RTCM3 corrections.

Setup:

1. Connect the rover to the RoboDot's Wi-Fi or to the network that RoboDot is on.
2. Connect the rover to the NTRIP Caster with the following criteria:

• Host: As displayed on the RoboDot Touch screen.
• Port: 10000
• Mount Point: Arbitrary — the caster's source table advertises RTCM3_MSM4 or RTCM3_MSM7 matching the RTCM Messages setting
• User: Arbitrary
• Password: Arbitrary

RoboDot connects to internet server/caster (VRS)

In Settings, configure the Wi-Fi and VRS profiles. Connect to the hotspot, then to VRS. Enable the corresponding boot options if you want those connections on startup.

LoRa Radio

With LoRa enabled, the base transmits corrections to RoboDot rovers and repeaters on the same channel. Keep antennas attached and maintain clear line of sight where possible.

Data Output

In Base mode, RoboDot outputs RTCM3 over USB serial without additional output configuration.