> For the complete documentation index, see [llms.txt](https://freegrow-1.gitbook.io/product-docs-en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://freegrow-1.gitbook.io/product-docs-en/welcome-to-the-growspace-studio/faq/uwb-mobile-kit-n1.md).
# UWB Mobile Kit N1
### 📦Kit Contents and Setup
How does the Mobile Kit work?
The Mobile Kit connects a smartphone with **three or more anchors** to measure precise location.
* The smartphone uses **BLE** to find and connect to nearby anchors
* Once connected, it uses **UWB** to receive real-time distance and direction data
* You can also process the data directly in your app using the **Android / iOS SDK**
Since the smartphone controls the system, setup is simple and testing can start right away
When can I use the Mobile Kit?
The Mobile Kit is useful when you want to **test RTLS quickly** or run **indoor location-based experiments** without complex setup.
Common use cases:
* Hands-on practice for training or workshops
* Collecting location data in a lab
* Testing prototypes during app development
* Analyzing indoor asset movement paths
It is especially suitable for **short-term tests** or **proof-of-concept (PoC)** projects.
What kind of environment is best for the Mobile Kit?
The Mobile Kit works reliably in **indoor environments with power supply**.
**Recommended environments:**
* Offices, classrooms, or labs with stable power
* Open indoor areas with low wireless interference
※ Anchors require a **wired power connection**.
How accurate is the positioning?
Indoors, you can expect an accuracy of **within ±30 cm**.\
The actual accuracy may vary depending on the environment and installation, but it is precise enough for typical testing and practice purposes.
What is included in the Mobile Kit?
Inside the box, you’ll find:
* 4 Mobile Anchors
* 4 USB-C power cables
* SDK documentation
* 4 Bracket
This basic set lets you start **RTLS testing in small indoor spaces** without buying anything extra.
※ Depending on your use case, you can add more anchors or expand the SDK sample code.
### 🔧Integration and Development
Can I connect the Mobile Kit to my app or service using the SDK?
Yes. The Mobile Kit can be easily integrated into your own app or service using the **GrowSpace SDK**.
The **GrowSpace Android SDK** combines **BLE and UWB-based indoor positioning** in a single package.\
It provides a simple interface using one main class: `SpaceUwb`.
Main features of the Android SDK:
* BLE + UWB distance measurement (Ranging)
* RTLS-based position calculation (x, y, z coordinates)
* Real-time detection of device connection and disconnection
[Android SDK 문서 바로가기](https://freegrow-1.gitbook.io/product-docs-en/en-mobile-kit-n1/uwb-n1-sdk/ranging-sdk/android)
[iOS SDK 문서 바로가기](https://freegrow-1.gitbook.io/product-docs-en/en-mobile-kit-n1/uwb-n1-sdk/ranging-sdk/ios)
Which platforms are supported (Android, iOS, etc.)?
The Mobile Kit supports **multiple platforms** to work across different operating systems.
* **Android**\
→ The official **GrowSpace Android SDK** is available.\
It integrates BLE + UWB ranging and positioning into a single class called `SpaceUwb`.
* **iOS**\
→ Integration is available using **Swift-based BLE communication**.\
Example code is provided for receiving location data and real-time monitoring.
Which smartphone models are compatible with the Mobile Kit?
Only smartphones with built-in **UWB** functionality are supported.\
Some models may not support **direction (azimuth, elevation)** data, depending on the device.
***
**✅** Android Devices
Most **Galaxy Plus** or **Ultra** models support direction data.\
Some **Google Pixel** models are also compatible.
Supported models include:
* Galaxy Note20 Ultra
* Galaxy S21+ / S21 Ultra
* Galaxy S22+ / S22 Ultra
* Galaxy S23+ / S23 Ultra
* Galaxy S24+ / S24 Ultra
* Galaxy S25+ / S25 Ultra
* Galaxy Z Fold2 \~ Z Fold5
* Some Pixel models with UWB
{% hint style="info" %}
For Galaxy S24+, direction data may not be fully supported. We recommend testing in advance.\
You can check compatibility directly in the app under **\[Check azimuth, elevation]**.
{% endhint %}
***
**✅**iOS Devices
Most **iPhone 11 or newer (excluding SE models)** automatically collect UWB direction data.
Supported models include:
* iPhone 11 / 11 Pro / 11 Pro Max
* iPhone 12–16 series (including Pro models, **excluding SE**)
**Please check the device manufacturer’s specifications or the** [**RTLS app menu**](https://freegrow-1.gitbook.io/product-docs-en/en-mobile-kit-n1/uwb-n1-series-guide/installation-guide/device-compatibility-check) **to see if UWB is supported.**
{% hint style="warning" %}
On iPhone 14 and later models (with UWB U2), the Elevation feature may not be supported.
{% endhint %}
How many smartphones can connect to one anchor at the same time?
One anchor can connect to **up to 5–6 smartphones simultaneously**.\
This means a single anchor can be used to measure the positions of multiple smartphones at the same time.
### 🔌Power and Usage Time
How long can the anchor run on a charge?
The anchors in the **Mobile Kit (N1)** do **not have built-in batteries** and are **not rechargeable**.
* They require a **wired power connection** to operate.
* They only work when connected to a power source, so they must be used in **indoor environments with electricity**.
How is power supplied? Is it battery-powered or cable-powered?
Anchors in the **Mobile Kit (N1)** use a **wired power connection via cable**.\
They do **not have built-in batteries**, so they must be used in places with a power source.
* Each anchor comes with **one USB-C cable**.
* You can connect it to a USB power adapter (5V / 1A or higher) or a multi-port charger.
* Smartphones run on their **own batteries**, so they don’t need separate power.
The Mobile Kit (N1) is easy to set up and supports long-term use, but it is **not suitable for battery-powered or mobile operation**.
※ The system may not work properly in outdoor environments where power is not available.
Why does the UWB distance value jump after a firmware update?
This is a normal behavior caused by the nature of **UWB (Ultra-Wideband)** technology, not by the firmware update.
#### ✅ **Causes**
* **Signal absorption** \
: The human body contains a lot of water, which weakens UWB signals.
* **Signal reflection** \
: Metal objects such as steel structures reflect UWB signals strongly and can create large errors in distance values.
* **Antenna direction** \
: Most phone UWB antennas are on the back of the device and work directionally. If the antenna is turned away from the device, the signal may not be received well.
***
#### ✅ **How to fix**
* **Remove direct obstacles**\
: Make sure there are no metal objects, walls, or people between the phone and the device.
* **Keep distance from the body**\
: Use the device a little away from your body.
* **Adjust antenna direction**\
: Rotate the phone so the UWB antenna faces the device. This improves signal stability.
{% hint style="warning" %}
Notes
* UWB signals use high frequency, so they are more sensitive to obstacles.
* Not only people and metal, but also walls, furniture, and electronic devices can affect signal quality.
* This is due to UWB’s physical characteristics, not the firmware update. For stable performance, adjust hardware placement and the usage environment.
{% endhint %}
Can the Mobile Kit N1 anchor also be used with a battery?
Hello, this is the GrowSpace team.
The UWB anchor in the Mobile Kit N1 is designed to operate with a wired power supply (power adapter connection).
\
Battery-powered or rechargeable use for continuous outdoor operation is not officially supported.
It is possible to move the installation location and conduct temporary indoor tests,
\
but for stable and continuous operation, we recommend fixed installation with a constant power supply.
That said, the anchor can be used in outdoor environments for testing purposes by connecting a low-power portable battery,
\
as long as it is not intended for permanent or long-term operation.
Why do some UWB boards turn off when using the same power bank?
This often happens because of the **low-power cut-off function** of the power bank.
#### ✅ **Causes**
* **Low-power cut-off**: Some power banks automatically stop output if the connected device uses less power than a set level. They assume no device is connected.
* **UWB board power use**: UWB (Ultra-Wideband) devices draw a lot of current for a short time when starting up, but their normal power use is very low. This can make the power bank cut the output.
* **Differences between boards**: Even with the same power bank, power use can be slightly different for each UWB board. Some boards may keep running, while others may turn off.
***
#### ✅ **How to fix**
* **Connect a smartphone at the same time**: If you connect both the UWB device and a smartphone to the power bank, a steady amount of power is used. This helps keep the output stable.
* **Test with a normal power source**: Try connecting the UWB board to a USB adapter or a PC USB port.
* If the board works normally with these, the problem is likely caused by the power bank’s low-power cut-off function.
{% hint style="warning" %}
Notes
* Each power bank has different settings for low-power cut-off and reset methods.
* Check the manufacturer’s manual if needed.
{% endhint %}
Does the SDK include a Low-pass Filter function?
The SDK itself does **not** include a Low-pass Filter. If you need this function, you must implement it yourself.