Schedule a Teams Meeting with Radiocrafts or leave a message on our contact form to learn more about our Sub-GHz mesh networking solution, RIIM, optimized for reliable and scalable Solar Networks!

solar segment

Do you need a subscription/license free, scalable, and highly reliable wireless communication solution for your solar installation? Capable of covering an entire campus or utility-scale solar facility on a single gateway with up to 1000 devices? Then Radiocrafts’ Industrial IP Mesh (RIIM) is the solution for you!

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Unmatched reliability in data transmission success rates

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Up to 1000 devices over a 40 x 40 km squared area

Available For All Modules

Available as both module and FW license for chip design


Optimal for utility-scale solar facility control and rooftop installations


Superior range and penetration in concrete and steel structures


Network partitioning and simplified commissioning for quick rollouts and simple scaling

Radiocrafts' Solution For Solar Networks - RIIM

Radiocrafts’ Industrial IP Mesh, RIIM, provides a highly efficient solution for a successful wireless solar deployment. Benefits include: 

  • Long range to cover an entire utility-scale solar facility, an entire campus, or building complexes.
  • Network partitioning for simple scaling.
  • Simplified commissioning for quick rollouts.
  • Communication range sufficient to put the gateway indoors for rooftop installations.
  • Ultra-Reliable and efficient penetration of reinforced concrete to monitor devices on different buildings with a single gateway.
  • Cost-efficient solution with minimum of equipment, remote maintenance possibilities, and no license/subscription fees.
  • High number of devices in a single network to cover an entire utility-scale solar facility or campus with one gateway.
  • Vast flexibility on the gateway and device side. Use PLCs (Programmable Logic Controllers), 4G/5G mobile gateways, Linux hosts, Direct Ethernet Connections, and more.
  • Low latency for frequent communication.
  • High data throughput for vast amounts of communication data.
RIIM logo (print)

RIIM by Radiocrafts is an easy-to-use, Sub-GHz, wireless communication network completely embedded in an RF module. Out-of-the-box, it includes all the critical components for a complete wireless network and has no license fee or subscription costs. Additionally, RIIM is a mesh network meaning it is self-forming, self-healing and self-optimizing. This makes network partitioning and commissioning exceptionally easy as it happens completely automatically. It is a plug-and-play process that simplifies your Solar network deployment greatly.

Out-of-the-box, it is very easy to implement Sunspec/Modbus RTU wireless inverter monitoring using our example code on GitHub.

solar inverter installation

RIIM supports a communication range of 700 meters between devices. Furthermore, a RIIM data packet can also spread across the network by hopping from device to device up to 28 times (28 mesh hops). This enables RIIM to cover a utility-scale solar facility as large as 40×40 kilometres squared, 25×25 miles squared.

In urban environments RIIM can cover a building complex or campus as large as 5.6 square kilometres long (3.5 miles). It also supports up to 150 meters between each device inside a building with reinforced concrete (28 mesh hops).

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

utility scale solar facility

Additionally, long range and coverage combined with the possibility to have up to 1000 devices on a single border router (gateway) allows for a highly scalable network. It creates flexibility in terms of border router placements, and reduces the cost of installation significantly. Only one gateway is needed to support a large scale deployment in a utility-scale solar facility, campus, or building complex. To cover a larger area, you simply add another border router.

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

RIIM provides unmatched reliability in data transmission success rates for Solar 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 network 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) works by scanning and marking all channels which are often found to be noisy. Those channels are then dropped from the frequency hopping list. This ensures that the radio only transmits data using the best channels with the least noise. AFA provides industry-leading high data throughput networking and low latency with minimal packet loss by taking the allowed duty cycle in Europe from 1% to around 40%! AFA enables frequent tracker communication and supports the vast amounts of data communication required by a Solar network.

These two features combined provide unmatched reliability which is essential in Solar networks located in campuses, facilities, and 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 materials and the long range between devices simplifies radio coverage planning significantly. It enables network operation in several building complexes from a single gateway and allows you to deploy your gateway indoors.   

You can read more about TSCH and Adaptive Frequency Agility in the application notes below.

rooftop solar installation

RIIM provides efficient local control and maintenance of devices through mist computing and two-way communication, enabling Over-The-Air updates as well. 

This means that the user can update their 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 solar installations, often times, many devices are located in hard-to-reach places and will be in operation for a long time, so touch less updates of firmware is important.

solar installation

RIIM is also designed to have direct cloud connection using protocols such as IPv6, UDP, CoAP and DTLS, providing immense flexibility on the gateway side. This 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.

You can read more about connecting RIIM with an edge gateway in our application note below.

You can also visit Radiocrafts’ GitHub page for a sample code on how to connect RIIM to an edge computer.

RIIM Support Tools

We recommend that 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. 

You can 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 Sub-GHz mesh networking solution, RIIM, optimized for reliable and scalable Solar Networks!

Intersolar Europe 2022 Exhibition


Radiocrafts will be exhibiting at the Intersolar Europe Exhibition in Munich, Germany, on the 11th- 13th of May 2022! 

Schedule a meeting or visit Radiocrafts at Hall A4 in the Norwegian Pavilion!  

We are looking forward to meeting with you soon!