This guide explains how to check and set anchor coordinates on a GrowSpace UWB anchor using serial commands.
Accurate coordinate configuration is critical to the accuracy of your UWB indoor positioning system.

(For use in Tera Term or another serial terminal environment)

Applies To

• GrowSpace UWB fixed anchors (GR-ANC-3001, Q1 series)
• Any environment that can send commands over a serial port (e.g., Windows PC + Tera Term)

Purpose

A UWB anchor calculates a tag’s position based on its own installed 3D coordinates (x, y, z).
So it’s important to enter each anchor’s coordinates accurately and be able to check the currently configured values.
This guide focuses on two commands:

• apg: reads the current coordinates
• aps x y z: sets the coordinates

Basic Commands

For the basic commands common to tags, listeners, and anchors, see the link below.

/docs/q1-en/commands-en/

Command Summary

Example:

• aps -2500 3600 1200 → x: -2.5m, y: 3.6m, z: 1.2m

Command Details

✅ apg – Read the anchor’s current coordinates

• Example input

apg
* Example output

apg: x:-2500 y:3600 z:1200 qf:100
* Output fields explained

Use apg to check the coordinates currently set on this anchor.
Always confirm that the installed position is reflected accurately.

✅ aps x y z – Manually set the anchor’s position

• Example input

aps -2500 3600 1200
* Interpretation
* X = -2.5m
* Y = 3.6m
* Z = 1.2m
* Example output

aps: ok

The aps command lets you manually set the x, y, z coordinates, and they are saved immediately upon entry.
No separate save command is needed, so run apg right after to confirm the values were applied correctly.

Notes

• All coordinates must be entered in millimeters (mm), and decimal points are not allowed.
• Example: 2.5m → 2500 / 0.0m → 0
• Negative coordinates are allowed, which is useful when your space’s origin isn’t at (0,0).
• You must also enter a Z coordinate; a value between 1200 and 3000mm is generally recommended.
• After setting an anchor’s coordinates, also confirm whether this device is designated as the reference anchor (Initiator).