RTLS Positioning (RTLS Page)

The RTLS Page in the GrowSpace mobile app estimates the smartphone’s current position in real time based on the coordinates of installed Anchors. Using trilateration, the device's location is displayed on a 2D grid within the indoor space.

---

Before You Start

Item	Description
Number of Anchors	You need to install at least 3 Anchors
Anchor Distance	Recommended spacing: 6–8 meters between Anchors
Coordinate Input	Enter the X, Y, Z coordinates of each Anchor in advance
Smartphone	A device that supports UWB (e.g., iPhone 11+, Galaxy S21+ and later)

Some Galaxy S24+ models and certain iPhone models may have limited feature support. Actual measurement results may vary depending on the device manufacturer or test environment.

---

Screen Layout

Section	Description
UWB Device Positioning	Set grid size (vertical and horizontal) based on Anchor positions
Grid Display (Position View)	Shows user location as “My Position” and Anchors as BLE names (e.g., FGU-000x)
Real-time Distance Info	Displays real-time distance (in meters) from each Anchor
Buttons	Start or stop location check, control measurement

All distances are shown in meters (m), and the origin point is at the top-left (0,0) of the grid.

---

Usage Instructions

• Enter Anchor Coordinates

  • Go to the BLE Scan page and enter the (X, Y) coordinates for each device based on its actual position.

  • Coordinates are based on meters (m), and the origin point of the space is (0,0).

  • Press the [Save] button to complete the registration.

The coordinates you enter won’t appear again on the BLE Scan screen, but they are saved internally and applied to RTLS calculations. Accurate coordinates have a significant impact on positioning accuracy. Please use actual measured values.

• Set Grid Size

  • Go to the RTLS Page and set the width and height of the space (in meters).

  • Example: If width = 4 m and height = 3 m → the grid is generated as 4 × 3.

• Start Positioning

  • Tap the Start Location Check button. Positioning begins based on the distance from nearby Anchors.

  • Your position will appear as a dot in the center of the grid and will update in real time as you move.

Example Setup

Device Name	X (m)	Y (m)
FGU-0001	0.0	0.0
FGU-0002	4.0	0.0
FGU-0004	0.0	3.0
FGU-0006	4.0	3.0

→ As shown above, place 4 Anchors in a rectangular layout. If the grid size is set to 4×3, the device location will be calculated and displayed accordingly.

---

Test Tips

• If real-time location appears unstable or incorrect, check the following:

  • Less than 3 Anchors connected

  • Z coordinate is missing or incorrect

  • Obstacles or metal interference in the area

• Set the number of grid cells (vertical × horizontal) based on the space size. (e.g., 3×4, 5×5)