All software and firmware downloads are governed by the
RTCU Software & Firmware License Agreement. (March 2026)

RTCU M2M Studio (Version 1.02) New!

The RTCU M2M Studio represents the definitive evolution of our development ecosystem, succeeding the legendary RTCU IDE after a quarter-century of innovation. This next-generation platform provides a unified, high-performance workspace designed to manage every stage of your Industrial IoT application’s lifecycle.

Engineered for professional precision, the RTCU M2M Studio introduces advanced code intelligence that transforms the development experience. The new intelligent editor provides real-time parameter suggestions, sophisticated syntax highlighting, and proactive code analysis, allowing developers to write more robust code in less time. This power is further enhanced by full integration with the RTCU IEX  for hardware-accurate simulation, while the Studio itself handles robust device communication and seamless deployment.

For immediate access to technical details, the online help serves as the web-based version of the comprehensive documentation included with the installation, ensuring that full technical guidance is always accessible.
 

        Released:  April 8, 2026.

RTCU IDE (Version 9.98)
Integrated Development Environment for development of RTCU applications.

For USB programming port support please download the RTCU Programming port driver package below.

For release notes, please read here.

        Released:  February 9, 2025.

RTCU Platform SDK (Version 2.00)

The RTCU M2M Platform is designed to be as open, adaptable and programmable as possible. For most applications the power and flexibility offered with the RTCU IDE are sufficient to realize the most advanced M2M applications, but for applications, which require a deeper customization the RTCU M2M Platform SDK is available.

With the RTCU M2M Platform SDK it is possible to expand the platform on the Linux system level with so called Platform Extensions. The SDK includes many working examples of Platform Extensions.
        
The RTCU M2M Platform SDK is for advanced developers and requires experience with C and Linux system development.
Please refer to the RTCU M2M Platform SDK Reference Manual here.

        Released: February 14, 2021.

RTCU IEX (Version 1.00)

The RTCU IEX stands as a pivotal extension to the RTCU M2M Studio, significantly amplifying the platform's capabilities for advanced runtime analysis and in-depth debugging of applications deployed on NX32L-based devices.

Please read more here.

        Released:  April 15, 2025.

RTCU IEX User's Manual

User's manual describing the use of the RTCU IEX.
This manual is also included in the above RTCU IEX installation package.

RTCU Emulator (Version 1.60)

The RTCU Emulator provides a robust Windows-based environment for the emulation of X32 and NX32 RTCU devices. This platform facilitates the testing and debugging of applications independently of physical hardware, streamlining the development process for supported architectures.

While effective for legacy systems, the RTCU Emulator does not support the latest generation of NX32L-based devices. For advanced debugging, full hardware-accurate execution, and support for the latest hardware, the RTCU IEX is recommended as the superior and more comprehensive alternative.

        Released:  August 26, 2019.

RTCU Emulator User's Manual

User's manual describing the use of the RTCU Emulator.

Microsoft Azure IoT Hub API (Version 2.10)

This package demonstrates how to communicate with the Microsoft Azure IoT Hub using MQTT.

        Released:  November 30, 2021.

Google Cloud IoT Core API (Version 1.00)

This package demonstrates how to communicate with the Google Cloud IoT Core platform using MQTT.

        Released:  August 30, 2020.

RTCU USB Driver for 64-bit Windows (Version 5.00)

This package installs the necessary USB device driver for connecting to all USB based products. This package is for 64-bit Windows only.

        Released: February 27, 2024.

RTCU USB Driver for 32-bit Windows (Version 5.00)

This package installs the necessary USB device driver for connecting to all USB based products. This package is for 32-bit Windows only.

        Released: February 27, 2024.

RTCU Communication Hub (Version V1.04)

The RTCU Communication Hub is a managed middleware service that enables reliable and secure bi-directional communication between RTCU devices installed in the field and the application back-end infrastructure.

The RTCU Communication Hub works over any TCP/IP based communication channel, whether it is behind a NAT firewall or a dynamic IP address schema. For full flexibility, it can be installed on-premises or in the cloud.
For detailed information, please refer to the product page here.            

For release notes, please read here.

        Released: August 30, 2020.

RTCU Communication Hub Plug-in Developers Kit (Version 1.10)

The RTCU Communication Hub Plug-in Developers Kit is required for development of plug-ins for the RTCU Communication Hub.        
   
A plug-in is a software component that, extends the RCH with new functionality. It makes it for example possible to control, which nodes are allowed to establish a connection with the RTCU Communication Hub, connect and disconnect event can be received and node mapping is possible. 

Please read the RTCU Communication Hub Plug-in Developers Kit User's Manual.

        Released: August 30, 2020.

RTCU Deployment Server (Version 6.00)

The RTCU Deployment Server (RDS) offers sophisticated features for maintaining application/firmware etc. in a large scale installation of RTCU devices remotely connected to the RTCU Communication Hub.

The RTCU Deployment Server can be configured by the user to ensure that the specified devices are operating with the correct firmware, application or generic files. The RTCU Deployment Server will automatically ensure that the devices are upgraded as requested and this task will take place during FULL operation of the device. Any interruption in an the upgrade attempt will be automatically handled and resumed to avoid any waste of expensive bandwidth.

Please read more about the product here and in the following product documentation: The Installation manual and the RDS Manager User's Manual.

RTCU Deployment Server requires a license to the RTCU Communication Hub.

For release notes, please read here.

        Released: July 22, 2025.

RTCU Deployment Server API (Version 3.00)

The RTCU Deployment Server API package allows control of the  RTCU Deployment Server from within a user written application.

The library provides access to the full functionality offered in the  RTCU Deployment Server Manager application allowing tight and automated interaction between back-end server applications and the RDS.

Please read the included RTCU Deployment Server API documentation.
 

        Released: September 12, 2018.

RTCU Communication Hub Demonstration Package (Version 3.01) 

Demonstration package for using the RTCU Communication Hub.
This package includes a complete example showing how to develop applications that utilize the RTCU Communication Hub. The content consists of an RTCU application and a back-end PC application developed in Microsoft Visual Studio C/C++.
The package includes a library, VSMSGW.DLL, which makes communication through the RTCU Communication Hub from a server application very easy.       

Also, read the included documentation here

(This is the successor to the RTCU Deployment Package, enhanced to use the RTCU Communication Hub)

          Released: October 6, 2020.

Using VSMSGW.DLL from C#  (Version 3.00)

This package demonstrates how the VSMSGW.DLL library, as included in the RTCU Communication Hub Demonstration Package, can easily be called from C#.  Includes a small C# project that demonstrates how to send/receive VSMS messages using the described technique.

        Released: February 16, 2020.

Vehicle Tracking Demo Package (Version 3.01)

This is a simple vehicle tracking demonstration project that consists of an RTCU application, and a Windows application. Demonstrates how to send and receive VSMS messages over the RTCU Communication Hub. This demo uses the VSMSGW.DLL library from the RTCU Communication Hub Demonstration Package.

        Released: September 9, 2019.

Advanced Vehicle Tracking Demo Package (Version 2.11)

This is an advanced Vehicle Tracking Demo with many features, including:
Automatic GPRS set-up, prioritized GSM roaming, periodic or inquiry of position, speed event, geofence event, input events, SMS set-up, compression/ encryption, advanced power-management and simple integration to Google Maps and Google Earth.
The included documentation is also available here.

         Released: September 9, 2019.

RTCU Programming Tool (Version 8.50) New!

A powerful, stand-alone utility designed for managing RTCU units independently of the full RTCU IDE /  RTCU M2M Studio. This tool streamlines essential maintenance tasks, including the local and remote transfer of applications and firmware.

• Documentation: The User’s Guide is included in the installation package or can be accessed online here.

• Driver Requirement: To enable USB programming port support, please ensure you have downloaded and installed the RTCU Programming port driver package.

• Release Details: For comprehensive information regarding this specific release, please review the notes here.

        Released: April 6, 2026.

RTCU Communication Support Package - CSP (Version 4.60) New!

The RTCU Communication Support Package (CSP) is a comprehensive, production-grade toolkit designed for high-performance interaction with RTCU devices. It facilitates seamless communication via direct serial cable or the RTCU Communication Hub.

Core Capabilities

Resilient Background Updates: Full support for application and firmware updates via cable, CSD (Data call), or FOTA through the RTCU Communication Hub. Zero Downtime Upgrades: Units remain fully operational, with the application continuing to run throughout the entire upgrade process. Fault-Tolerant Resumption: If an update is interrupted, the process automatically resumes at the exact point of failure, minimizing data usage and time. Simultaneous Multi-Session Management: Manage and connect to multiple RTCU devices at once, utilizing any combination of local and remote connections.

Battle-Tested Reliability

The functionality within this package is the same battle-tested engine used in every Logic IO product. It serves as the foundational communication layer for both the RTCU IDE, RTCU M2M Studio and the RTCU Programming Tool, ensuring maximum stability for mission-critical deployments.

What’s Included

Core DLL Library: The high-performance library for direct integration into your applications. Sample Programs: Includes both x86 and x64 sample implementations to jumpstart your development. RTCU Programming Tool Source: Full source code for the RTCU Programming Tool is provided for deep customization and reference. Complete Technical Documentation: In-depth guides covering every aspect of the protocol and library.

For release notes, please read here.
 

        Released: April 6, 2026.

RTCU Communication Protocol Documentation Set

This protocol documentation set describes the protocols used for communicating with the RTCU devices using a serial line (cable or modem) or over a TCP/IP connection using the RTCU Communication Hub.

This Documentation Set is composed of the following three documents:

•  RTCU Gateway Protocol (V3.01).
•  RTCU Serial Line Remote Access Protocol (V2.20).
•  RTCU RACP Transaction Specification (V1.31).

The ZIP file is password protected. Please request unzip password here.

        Updated:  October 13, 2019.

RTCU Communication Hub Protocol Reference Implementation V7
 

This is the reference implementation of the RTCU Communication Hub protocol (RACP2), developed in standard C and provided as a buildable Visual Studio 2019 C/C++ project.
To facilitate a complete understanding of this implementation and to obtain further details regarding the Gateway Protocol, the "RTCU Gateway Protocol" document should be consulted. This document is included as part of the "RTCU Communication Protocol Documentation Set" available in the section above.

The implementation prioritizes portability, ensuring that the core logic remains independent of the underlying operating system. All platform-dependent features—such as the creation of threads and semaphores—are defined through straightforward, standard C macros. This architectural approach allows for efficient integration across a wide variety of hardware and software platforms.

The ZIP file is password protected. Please request unzip password here.
 

        Released: February 16, 2020.

Microsoft Visual C++ 2015-2019 Redistributable (x64) 14.24.28127

This is the Microsoft Visual C++ 2015-2019 Redistributable installation package from Microsoft that may be required on some Windows 7 systems.

        Released: February 16, 2020.

Microsoft Visual C++ 2015-2019 Redistributable (x86) 14.24.28127

This is the Microsoft Visual C++ 2015-2019 Redistributable installation package from Microsoft that may be required on some Windows 7 systems.

        Released: February 16, 2020.

Windows CE upgrade package  (Version 3.00)
Please read more here for additional information.
See the readme.txt included in the package for upgrade instructions.
     
For information about the NMP platform see here.

        Released: February 28, 2016.

Runtime-Firmware for the RTCU NX-200 (Version 2.50.00) New!
Requires System V1.09.00 / Runtime V2.41.00 or later.

Please read more here for additional information.

        Released: March 10, 2026.

Runtime-Firmware for the RTCU NX-400 (Version 2.50.00) New!
Requires System V1.09.00 / Runtime V2.41.00 or later.

Please read more here for additional information.

        Released: March 10, 2026.

Runtime-Firmware for the RTCU NX-900 (Version 2.50.00) New!
Requires System V1.09.00 / Runtime V2.41.00 or later.

Please read more here for additional information.

        Released: March 10, 2026.

Runtime-Firmware for the RTCU LX2 (Version 2.50.00) New!

Please read more here for additional information.

        Released: March 10, 2026.

Runtime-Firmware for the RTCU LX4 (Version 2.50.00) New!
Requires System-Firmware V1.06.00.

Please read more here for additional information.

        Released: March 10, 2026..

Runtime-Firmware for the RTCU LX5 (Version 2.50.00) New!
Requires System-Firmware V1.06.00.

Please read more here for additional information.

        Released: March 10, 2026.

Runtime-Firmware for the RTCU LX9 eco (Version 2.50.00) New!

Please read more here for additional information.

        Released: March 10, 2026.

System-Firmware for the RTCU NX-200 (Version 1.09.22)
Must be installed on top of version 1.09.00

It is a large update, and it can take several minutes to apply to the device. 
Please read more here for additional information.

        Released: April 6, 2024.

System-Firmware for the RTCU NX-200 (Version 1.09.00)
Includes Runtime V2.00.00.

The System-Firmware contains the entire system that includes Linux and the Runtime.
It is a large update, and it can take several minutes to apply to the device. 
Please read more here for additional information.

        Released: April 18, 2022.

System-Firmware for the RTCU NX-400 (Version 1.09.00)
Includes Runtime V2.00.00.

The System-Firmware contains the entire system that includes Linux and the Runtime.
It is a large update, and it can take several minutes to apply to the device. Please read more here for additional information.

        Released: April 18, 2022.

System-Firmware for the RTCU NX-900 (Version 1.09.00)
Includes Runtime V2.00.00.

The System-Firmware contains the entire system that includes Linux and the Runtime.
It is a large update, and it can take several minutes to apply to the device. Please read more here for additional information.

        Released: April 18, 2022.

System-Firmware for the RTCU LX4 series (Version 1.04.00)
Includes Runtime V2.00.00.

The firmware file will upgrade the system-firmware from V1.03.00 to V1.04.00.
The upgrade can take several minutes to apply to the device. 
Please read more here for additional information.

        Released: April 18, 2022.

System-Firmware for the RTCU LX4 series (Version 1.06.00)
Includes Runtime V2.11.00.

The firmware file will upgrade the system-firmware from V1.04.00 to V1.06.00.
The upgrade can take several minutes to apply to the device. 
Please read more here for additional information.

        Released: October 26, 2022.

System-Firmware for the RTCU LX4 series (Version 1.06.00)
Includes Runtime V2.11.00.

The firmware file will upgrade the system-firmware from V1.05.00 to V1.06.00.
The upgrade can take several minutes to apply to the device. 
Please read more here for additional information.

        Released: October 26, 2022.

System-Firmware for the RTCU LX5 series (Version 1.04.00)
Includes Runtime V2.00.00.

The firmware file will upgrade the system-firmware from V1.02.00 to V1.04.00.
The upgrade can take several minutes to apply to the device. 
Please read more here for additional information.

        Released: April 18, 2022.

System-Firmware for the RTCU LX5 series (Version 1.06.00)
Includes Runtime V2.11.00.

The firmware file will upgrade the system-firmware from V1.04.00 to V1.06.00.
The upgrade can take several minutes to apply to the device. 
Please read more here for additional information.

        Released: October 26, 2022.

System-Firmware for the RTCU LX5 series (Version 1.06.00)
Includes Runtime V2.11.00.

The firmware file will upgrade the system-firmware from V1.05.00 to V1.06.00.
The upgrade can take several minutes to apply to the device. 
Please read more here for additional information.

        Released: October 26, 2022.

Monitor-Firmware for the RTCU LX4 series (Version 2.00.00)

The firmware file will upgrade the monitor-firmware to V2.00.00.
The upgrade can take several minutes to apply to the device. 
Please read more here for additional information.

NOTE: Please apply the Monitor-Firmware before the System-Firmware.

        Released: April 18, 2022.

Monitor-Firmware for the RTCU LX5 series (Version 2.00.00)

The firmware file will upgrade the monitor-firmware to V2.00.00.
The upgrade can take several minutes to apply to the device. 
Please read more here for additional information.

NOTE: Please apply the Monitor-Firmware before the System-Firmware.

        Released: April 18, 2022.

X32/NX32 Firmware

MDT-200 Programming tool (Version 1.00)

Programming tool to program the MDT-200 Terminal with new firmware.
Requires a cable connection to the MDT and a special programming cable.
The documentation using this tool is available here

        Released: June 27, 2007.

A catalogue of current and past firmware releases can be found here.