The reference design and development platform for indoor UWB RTLS solutions based on TDoA


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The MK UWB Kit RTLS is your ultimate entry point for implementing a cutting-edge indoor Real-Time Location System (RTLS) using the advanced Time Difference of Arrival (TDoA) multilateration technique.

Why choose TDoA multilateration?

  • Unmatched accuracy: UWB technology offers incredibly precise positioning measurements, down to the centimeter, making it superior to other technologies, especially in indoor environments.
  • Instantaneous Real-time data: With TDoA positioning, data is processed in real-time by the backend RTLS engine. This means you can instantly know the exact location of tracked devices and trigger actions based on their position or movement patterns.
  • Scalable & Power-efficient: The broadcasting nature of TDoA-based positioning ensures power efficiency and scalability, allowing you to track tens of devices simultaneously with an efficient infrastructure of anchors.

How TDoA works?

TDoA determines device positions by measuring the time it takes for a UWB signal to be received at multiple fixed anchor devices placed within the monitored environment. This technique enables reliable and accurate location tracking for both assets and people in various indoor settings.

Dive into the world of Ultra-Wideband (UWB) technology and experience its numerous advantages for real-time positioning. The MK UWB Kit RTLS is designed to give you a hands-on experience and the essential tools to kick-start the development of your own Real-Time Location System (RTLS) solution, powered by NXP’s Trimension™ UWB ICs.

With the MK UWB Kit RTLS, you can:

  • Track with precision: learnto track one or more UWB-enabled tags using fixed anchor devices leveraging on TDoA-based real-time positioning. The MK UWB RTLS demo software allows you to experience first-hand the impressive capabilities of UWB technology.
  • Jumpstart your development: leverage the comprehensive hardware and software examples included in the kit to design and develop your own UWB RTLS solutions.

Step into the future of indoor tracking with the MK UWB Kit RTLS—where precision meets real-time efficiency and scalability

MK UWB Kit RTLS: Hardware materials


Unlock precise positioning with the MK UWB Tag, designed in an ultra-compact form factor ideal for low-power applications. Powered by Murata’s advanced Type 2DK UWB Module, this all-in-one UWB + Bluetooth® LE combo integrates the NXP Trimension™ SR040 UWB Chipset, offering:

  • Advanced Integration: Incorporates the Murata Type 2DK UWB Module for superior performance.
  • Power Efficiency: Fully integrated solution with Trimension SR040™, optimized for low power operation.
  • Compact Design: Extra small form factor, perfect for portable UWB devices:
    • With Debug Connector: 3.5 cm x 4.6 cm x 1.1 cm
    • Without Debug Connector: 3.5 cm x 3.5 cm x 1.1 cm
  • Customizable Peripherals: Includes accelerometer, secure element, buzzer, LED, and button for versatile use cases.
  • Long Battery Life: Operates on a coin-cell battery, providing more than 9 months of battery life.
  • Software Compatibility: with all SR040 software, including MK UWB Kit software and NXP UWB IoT middleware.
  • Development Resources: Access to reference hardware design files for accelerated development.
  • Sleek Casing: Available in a compact and stylish casing design.


Flexible platform to develop customized UWB systems featuring Murata Type 2BP UWB Module. It can be used as an RTLS anchor to track UWB devices. The ABS casing is ideal for tripod or wall mounting. Velcro strips on the side of the anchor casing allows easy mounting of external power banks.

This platform includes:

  • MK UWB Shiled 2: Arduino-compatible development board
  • New MK UWB SR150 Antenna board, includes Murata Type 2BP UWB Module
  • FiRa certification: ensures compliance with industry standards
  • Broad Channel Support: Operates on UWB channel 5 (6.5 GHz) & 9 (8 GHz), 500 MHz per channel.
  • Versatile Deployment: Suitable for larger infrastructures, with an ABS casing for tripod or wall mounting and Velcro strips for easy power bank mounting.
  • Includes a USB drive with software and documentation resources

MK UWB Kit RTLS: Software materials

The MK UWB RTLS Demo Android application showcases the implementation of an uplink TDoA-based RTLS solution, featuring:

  • Seamless communication: uses Bluetooth LE to connect with anchors for system configuration and data collection
  • Real-Time Positioning: Executes the multilateration algorithm to compute the real-time location of tracked devices
  • Multi-tag tracking: Supports tracking of up to 4 UWB-enabled tags using 4 fixed anchors
  • Several configurations and personalization options
  • Comprehensive documentation: Step-by-step instructions and a quick installation guide to position hardware and run the demo
  • Source code access: Includes firmware applications and Android application source code for kick-starting your own RTLS desing

MK UWB Kit RTLS: Documentation

Detailed documentation provides clear instructions for installing anchors, running the UWB RTLS Demo, and developing your own RTLS use cases:

  • MK UWB RTLS Kit User Manual
  • MK UWB RTLS Kit Quick Installation Guide
  • MK UWB Shield 2 User Guide
  • MK UWB Tag User Guide
  • MK UWB Tag Hardware Design Files

Want to do more?

MK UWB Kit SR150/SR040

The MK UWB Kit SR150/SR040 is the most comprehensive reference design and development platform for UWB-based IoT solutions.

Experience UWB technology with ready-to-run demonstration apps, Arduino-connected development boards and software libraries to start prototyping and developing your own UWB applications with minimum effort.

Leverage on our powerful software tools such as the MK UWB Toolbox Android application to develop innovative mobile applications, the MK UWB PC Shell application to obtain ranging information on any host computer, the MK UWB Library which provides a simple but powerful API for your IoT embedded solution and out-of-the-box support for NXP QN9090 and Nordic nRF 52840 MCUs.

MK UWB Engineering services

Long-standing expertise in UWB technology to help you reduce your time to market and focus on your own UWB solution development:

  • UWB technology consulting and support services: Guidance on use case definition and system integration, system architecture, software requirements, Q&A resolution, FIRA related process and use cases,…
  • Development of customized UWB use cases: embedded software development, mobile application software development, back-end integration, system integration,…
  • Design and development of customized antenna board based on customer requirements and constraints in order to optimize ranging and AoA measurements
  • Porting of MK UWB SDK into a customer platform, enabling MK UWB SDK software tools and functionalities on any customer platform that meets the SDK requirements
  • Licensing of MK UWB Library, for an easy integration of UWB technology while accelerating the time to market


MobileKnowledge is a team of HW, SW and system engineers, experts in smart, connected, and secure technologies for the Mobile and IoT worlds. We are your ideal engineering consultant for any specific support in connection with your NFC, UWB, Secure IoT and Functional Safety developments. We provide consultancy, design and development services for HW systems, embedded FW, mobile phone applications and secure cloud solutions leveraging on smart, connected and secure technologies.

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