Schedule a Teams Meeting with Radiocrafts or leave a message on our contact form to learn more about our long range mesh communication solution, RIIM, optimized for an efficient wireless emergency lighting network!

emergency lighting networks

Do you need a subscription/license free, long range, highly reliable wireless communication mesh solution for your emergency lighting network? A network capable of covering an entire building complex on a single gateway with up to 1000 emergency lights? Then Radiocrafts’ Industrial IP Mesh (RIIM) is the solution for you!


Cover an entire building with up to 1000 emergency lights per gateway


Superior range and penetration in concrete buildings

low cost

No license/subscription fees, everything included in the module

advanced security

Unmatched reliability in data transmission success rates

battery operation

15+ years of battery operation

Quick and easy to integrate, vast flexibility in gateway placement

Radiocrafts' Solution For Emergency Lighting Networks - RIIM

The requirements on the network for a successful wireless emergency lighting network deployment include: 

  • Quick and easy network integration and deployment.
  • Long range for coverage of an entire building complex.
  • Ultra-reliable communication/operation in buildings made of reinforced concrete and high levels of interference from other radio solutions is present.
  • Cost-efficient solution with minimum of equipment, remote maintenance possibilities, and no license/subscription fees.
  • Long battery lifetime for emergency lights located in hard-to-reach places and for easier maintenance.
  • Test luminaires from anywhere at anytime, including function tests, duration tests, automatic logging, and automated failure alerts.
  • Perform real-time monitoring of current status and incidents.
  • Perform remote software upgrades and maintenance monitoring, including alerts for end-of-life products, as well as lamp, LED, and battery failures.
  • Integrate emergency lighting with building security and access systems.
  • Generate analytics to determine building occupancy rates and traffic patterns.
  • Localised sensors which can identify where the hazard is and use emergency lighting to show the best path to safety.

Radiocrafts’ Industrial IP Mesh, RIIM, provides a highly efficient solution to these Emergency Lighting requirements.

RIIM - Wireless Communication Network

RIIM by Radiocrafts is an easy-to-use, Sub-GHz, wireless communication network completely embedded in an RF module. It includes all the critical components for a complete wireless network and has no license fee or subscription costs. It is ready to go when you buy the module. Additionally, since RIIM is a mesh network, it is self-forming, self-healing and self-optimizing. This simplifies the installation, integration, and implementation of  emergency lighting networks greatly.

A RIIM network can cover building complexes as large as 5.6 square kilometres long (3.5 miles). Inside a building with reinforced concrete, it also supports a range of up to 150 meters between each emergency light. Furthermore, a RIIM data packet can spread across the network by hopping from device to device up to 28 times (28 mesh hops maximum).

Your emergency lighting network can have up to 1000 emergency lights for a single border router (gateway). This range and high device count per network creates gateway placement flexibility and reduces the cost of installation significantly. Only one gateway is needed to support a large scale deployment in a massive building complex.

Read more about RIIM range test results, including inside our building complex in the application notes below.

In addition, a RIIM Mesh Router (used to forward data up/down the network and to extend the network) can handle down to 118uA @ 3.3v average power consumption enabling all battery devices in the network to further extend the network coverage.

RIIM operates on the 868/915 MHz frequency bands which offer much better range than the 2.4 GHz frequency band solutions.

emergency lighting networks

RIIM provides unmatched reliability in data transmission success rates for Emergency Lighting networks thanks to the supported Time-Synchronized Channel Hopping and Adaptive Frequency Agility features.

Time Synchronized Channel Hopping (TSCH) works by re-sending a data packet that was lost between two devices on a different channel in the next available time slot. It is a channel hopping mode designed to make a mesh with less packet collisions and higher reliability. A TSCH network has proven to have a reliability of up to 99.99%. 

Adaptive Frequency Agility (AFA) provides industry-leading low latency data throughput with minimal packet loss by taking the allowed duty cycle in Europe from 1% to around 40%! AFA works by scanning all channels and marking the ones which are often found to be noisy. Those channels are then dropped ensuring that the radio only uses the best channels with the least noise.

The combination of these two features provides unmatched reliability which is essential in emergency lighting networks located in building complexes where the floors and walls are made of reinforced concrete and high levels of interference from other radio solutions are present. Good penetration in building material will significantly simplify radio coverage planning. It also enables you to reach emergency lights mounted in hard-to-reach places like the corner of a building parking lot. In addition, localised sensors can identify a hazardous location and use emergency lights to reliably show the path to safety.

Read more about TSCH and Adaptive Frequency Agility in the application notes below.

emergency lighting networks

RIIM provides efficient local control and maintenance of nodes through mist computing and two-way symmetrical communication. This combination enables Over-The-Air updates as well. 

RIIM includes the ICI framework. An ICI application is always running on the module to tailor the modules’ behavior to the customers’ unique requirements. In its simplest form, the ICI application is just configuring the modules’ hardware interfaces, the radio network, and defines when to read and write to those interfaces. ICI also supports mist computing which allows you to control each emergency light and sensor locally, significantly reducing bandwidth requirements. Mist computing also provides fast responses to local events such as, performing real-time monitoring of room status and hazards, alerts for end-of-life products, lamp/LED/battery failures, generating analytics to determine building occupancy rates and traffic patterns, testing of luminaires, integrating with building and access systems, and more.

A RIIM network supports 2-way symmetrical communication which is essential for Over-The-Air updates.  This means that the user can update their user-defined ICI firmware when the network is deployed and in full operation. New sensors/controllers can be added when the need arises and the user can broadcast messages of new schedules efficiently. With emergency lighting networks, often times, many sensors and emergency lights are located in hard-to-reach places and will be in operation for a long time, so touch less updates of firmware is important.


RIIM is very low power for battery operation supporting long lasting projects of 15+ years. It supports several features that reduce power consumption, including:

  1. The chosen electronic components inside are low power to start with.
  2. The network leaf nodes can be put in “Sleepy” mode, reducing the current consumption to a minimum (4.7 uA).
  3. The output power of the module is configurable, not to consume more power than needed during transmit.
  4. TSCH allows the Mesh routers to sleep when there is no time slot for incoming or outgoing RF data packages.
  5. The RIIM Mesh Router can handle down to 118uA @ 3.3v average power consumption enabling all battery devices in the network to further extend the network coverage. For mesh routers in TSCH the battery lifetime is increased with more than 50%. This is accomplished by optimizing the sleeping pattern.
  6. The data processing that can be done by the customer in ICI can save substantial power. RIIM™ supports cloud computing which means that instead of sending all raw sensor reading data to the Cloud, the user can just send the interesting data, such as an alarm when a threshold is met.

Read more about RIIM’s low power capabilities in the application notes below.

RIIM is also designed to have direct cloud connection using protocols such as IPv6, UDP, CoAP and DTLS. This eliminates the need for a dedicated gateway and offers direct end-to-end IP packet communication with end-to-end security. Furthermore, RIIM can operate in a local mode where no internet connection is used.

A third use case is to extend RIIM with an edge gateway which serves as a network entry point for devices talking to cloud services. You can then have an external cloud connection from the gateway device. This is useful when the user intends to implement some edge-computational functions, thus decreasing latency. It can also be useful in case connection to the cloud is lost. In addition, the gateway does not need to be a specific IoT gateway, it can actually be a PLC (Programmable Logic Controller), a Raspberry Pi (or any Linux host), or a computer.

Read more about connecting RIIM with an edge gateway in our application note below.

Also visit Radiocrafts’ GitHub page for a sample code on how to connect a RIIM network to an edge computer.

RIIM Support Tools

We recommend you buy a RIIM Development Kit in your early stage product evaluation. The development kits are designed to be easy to use and to very quickly support a wireless link or network, where you can make a good analysis of the network performance. 

Buy the RIIM Development kit from:

Read more about the RIIM Network here.

Learn about the different RIIM Parts and Tools here.

Read our extensive documentation on RIIM, including datasheets, User Manuals, Development Kit documentation, Application Notes and more, here.

Download Software Tools for RIIM here.

Watch tutorial videos on how to use the RIIM Development Kit here.

Schedule a Teams Meeting with Radiocrafts or leave a message on our contact form to learn more about our long range mesh communication solution, RIIM, optimized for an efficient emergency lighting network!