Certified Wi-SUN Technology from the Leader in IoT

Wi-SUN stands for Wireless Smart Ubiquitous Network. It is an open, standards-based wireless networking technology designed for large-scale outdoor IoT deployments that require secure, reliable, and interoperable communication. Wi-SUN is widely used in smart utility, smart city, and industrial infrastructure networks.

Key Wi-SUN features include standards-based interoperability, IPv6 networking, self-forming and self-healing mesh routing, enterprise-grade security, multi-hop communication, and support for large-scale deployments. Wi-SUN networks can support thousands of devices while maintaining reliability and flexibility.

Wi-SUN operates primarily in regional license-exempt sub-GHz frequency bands. Common examples include 902–928 MHz in North America and 863–870 MHz in Europe, although supported frequencies vary by country and regulatory region.

The range between two Wi-SUN devices can vary from several hundred meters to multiple kilometers depending on terrain, frequency band, antenna design, transmit power, and PHY mode. Because Wi-SUN uses mesh networking, overall network coverage can extend across entire cities, utility service areas, or industrial campuses through multi-hop communication.

Wi-SUN is commonly used for advanced metering infrastructure (AMI), smart city lighting, traffic management systems, utility automation, EV charging infrastructure, and industrial IoT networks. Increasingly, Wi-SUN is also being used to enable micromesh networks for applications such as smart agriculture, commercial building automation, and distributed energy resources (DER), where secure, scalable, and interoperable connectivity is required across large numbers of devices. Wi-SUN's IPv6-based architecture and self-healing mesh capabilities make it well suited for these infrastructure-scale deployments.

Wi-SUN and LoRaWAN are designed for different types of deployments. LoRaWAN is typically used for low-bandwidth, star-topology LPWAN applications that prioritize long battery life and simple infrastructure. Wi-SUN is designed for large-scale mesh networks that require higher throughput, IPv6 connectivity, interoperability, and support for thousands of devices.

Compared to many LPWAN technologies, Wi-SUN provides standards-based interoperability, self-healing mesh networking, native IPv6 support, and higher data throughput options. Wi-SUN is optimized for infrastructure-scale deployments that require network resilience, flexibility, and long-term scalability.

Wi-SUN FAN 1.1 introduces advanced PHY capabilities such as OFDM support and Mode Switch. These features allow devices to dynamically use different PHY modes depending on network conditions, helping optimize throughput, range, latency, and network efficiency. Learn more about unlocking smarter Wi-SUN networks with mode switch and concurrent detection.

A Wi-SUN Border Router connects the Wi-SUN mesh network to external IP networks, cloud services, or utility backhaul infrastructure. It acts as the network entry point, enabling communication between Wi-SUN devices and enterprise applications while supporting routing, network management, and security functions.

Smart city deployments often involve thousands of connected devices from multiple vendors that must operate reliably for many years. Wi-SUN provides the scalability, interoperability, security, and self-healing mesh capabilities needed for applications such as street lighting, traffic control, environmental monitoring, and public infrastructure management.

The Wi-SUN Alliance is a global ecosystem of utilities, semiconductor manufacturers, module suppliers, equipment vendors, software providers, and infrastructure companies working together to promote interoperable Wi-SUN solutions and certification programs.

Developers can get started with Silicon Labs Wi-SUN development using the EFR32FG25 or EFR32FG28 wireless SoC platforms together with Simplicity Studio, Silicon Labs' integrated development environment. The Silicon Labs Wi-SUN stack, software examples, network analysis tools, debugging utilities, and development ecosystem help accelerate development, testing, and optimization. Once an application is validated, developers can leverage Silicon Labs' Wi-SUN-certified platform and certification support resources to streamline interoperability testing and Wi-SUN Alliance certification.

Wi-SUN certified products are available from a broad ecosystem of semiconductor vendors, module manufacturers, networking companies, utility solution providers, and infrastructure suppliers. The Wi-SUN Alliance maintains an official registry of certified products.

Yes. Multiple vendors offer Wi-SUN-certified modules that can help accelerate development and simplify certification efforts. Examples include Digi XBee Wi-SUN modules and other certified solutions available through the Wi-SUN ecosystem, including modules built on Silicon Labs wireless SoCs.

Yes. Silicon Labs provides Wi-SUN-certified silicon, software stacks, development tools, documentation, reference designs, and engineering support to help developers build, test, and certify Wi-SUN products, including support for Wi-SUN FAN 1.1 development.

Yes. Silicon Labs has demonstrated large-scale Wi-SUN test networks with more than 1,000 nodes to validate scalability, interoperability, network reliability, and real-world performance. These deployments help developers evaluate Wi-SUN behavior under realistic operating conditions.

Wi-SUN FAN 1.1 (Field Area Network 1.1) is the latest generation of the Wi-SUN standard for large-scale outdoor IoT networks. It introduces enhancements such as OFDM support, Mode Switch, and other advanced networking capabilities that improve throughput, scalability, network efficiency, and application flexibility. FAN 1.1 enables utilities, smart cities, and industrial operators to support increasingly demanding applications while maintaining the interoperability, security, and reliability that Wi-SUN is known for.