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ROHM Develops Wi-SUN FAN Module Solution

ROHM has established a new Wi-SUN FAN, Field Area Network module for infrastructure applications, capable of connecting up to 1,000 nodes in a mesh network.

ROHMWi-SUN FAN the latest Wi-SUN international wireless communication standard, which eliminates the communication costs associated with conventional LPWA (Low-Power Wide-Area) wireless standards.

In response to these challenges, ROHM developed the BP35C5, an in-house ultra-small (15.0mm × 19.0mm size) Wi-SUN FAN module. This solution can connect with up to 1,000 devices (e.g., traffic signals and streetlights), enabling the configuration of a remote wireless management system covering an entire city.

The BP35C5 also includes the necessary security functions for carrying out secure communication without the need for complicated control. Certifications acquired under the FCC (Federal Communications Commission) and ARIB (Association of Radio Industries and Business) allow for immediate use both in the US and Japan. Other countries and regions will be supported shortly.

The BP35C5 module and BP35C5-T01 evaluation board will be available for purchase in mid-February 2021 through online distributors Digi-Key and Mouser. Various documents and user guides are now available on ROHM’s website.

Wi-SUN FAN (Wireless Smart Utility Network for Field Area Network profile) is the latest protocol under the Wi-SUN international communication standard with over 95 million units shipped worldwide.

Whereas conventional LPWA standards support only star-type networks, Wi-SUN FAN enables the configuration of mesh networks capable of performing multi-hop transmission between relays, while allowing for remote management of terminal-mounted applications via bidirectional communication between relays and terminals. This makes it possible to automatically optimize the hop route between relays in the event of communication failure due to newly constructed buildings or other surrounding obstacles

Unlike other LPWA standards that incur communication costs for each terminal, Wi-SUN FAN can be operated at little to no cost.


Aishwarya Saxena

A book geek, with creative mind, an electronics degree, and zealous for writing.Creativity is the one thing in her opinion which drove her to enter into editing field. Allured towards south Indian cuisine and culture, love to discover new cultures and their customs. Relishes in discovering new music genres.

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