FL Semiconductor LLC · Kissimmee, Florida
FLSEMI
New: DECT NR+ evaluation kits for US developers — Thingy:91 X, nRF9151 DK and nRF9131 EK from US$72 + shipping, now available to order →
Wireless edge integration · Florida, USA

Self-healing connectivity,
built not to fail.

Gateways, radio stacks and field devices that bring Bluetooth, Modbus and DECT NR+ onto one PoE cable — for the buildings and sites you already run.

Buy a unit to test → Plan a project

Hardware specification (PDF)Buy online (US)

BFi53ER0S EdgeRouter gateway
New · DECT NR+ evaluation kits · US developers

DECT NR+ on Nordic Semiconductor hardware, ready to run.

Thingy:91 X, nRF9151 DK and nRF9131 EK boards programmed with FLSEMI’s full-function DECT NR+ firmware and tested before they ship. Order online by card or PayPal; kits usually ship within two weeks.

Thingy:91 X kit US$112nRF9151 DK kit US$111nRF9131 EK kit US$72Shipping extraUS only
Order a kit → Evaluation kits for developers — not FCC-authorized end products, and not a certified DECT NR+ stack.
Nordic Semiconductor Thingy:91 X
Nordic Semiconductor nRF9151 DK
Nordic Semiconductor nRF9131 EK
Solutions

Start from the site, not the part number.

Senior-living lounge
Help call & presenceAssistive Help Call for Care, Healthcare & SchoolsOne press calls for help; battery-free sensors report the room around it.
 Semiconductor fab
RS-485 · DECT NR+ · lone-worker callFactories & InfrastructureEquipment, rooms and people back in your BMS or SCADA — wired, wireless or battery-free.
 Hotel guestroom
Lighting control (NLC) · battery-free switchesCommercial Buildings & HotelsDimming, scenes and switches on one Bluetooth Mesh across the building.
 Fishing fleet in a harbour
In developmentVirtual AIS: Maritime & Disaster ResponseDrones, crews and sensors on the chart you already use — over IP.
 A group hiking a mountain trail
In development · DECT NR+ push-to-talkGroup Voice & Messaging: Outdoor, Tunnel & Large-Site TeamsVoice and text for a whole group where phones have no signal — mountain trails, ski touring, tunnels, and large sites such as factories, hospitals, care homes, cruise ships and construction sites. No towers, no SIM, no base station.
Products

Three product lines.

BFi53ER0S EdgeRouter
EdgeRouterBattery-free Bluetooth · Modbus · ThreadA PoE-powered gateway that hands what is already on site to the building network. BFi53ER0, and BFi53ER0S with DECT NR+.EdgeRouter →
 BFi91XTD DECT NR+ sensor nodeCT11-USB VOx thermal camera core
SensorsMulti-sensors · presence & light · thermal imagingBattery-free Bluetooth sensors, the BFi91XTD DECT NR+ node and the CT11-USB VOx thermal core, all reporting into one network.Sensors →
 BFi53CVD dimmerBFi5EWS battery-free switches
LightingDimmers · battery-free switchesBluetooth Mesh / NLC dimmers and battery-free switches, commissioned from one app.Lighting →
Technology

Three radios we build on.

Bluetooth Mesh & NLCBluetooth MeshA Bluetooth Mesh and NLC stack we wrote ourselves, on Nordic Semiconductor nRF5340 with a front-end module.Bluetooth Mesh → ETSI TS 103 636DECT NR+Our own licence-free DECT NR+ stack, verified clause by clause against the test specification.DECT NR+ → No batteriesSelf-Powered BluetoothSwitches and sensors powered by the press or the light, delivered onto your IPv4/IPv6 network.Self-Powered Bluetooth →
Proven in the field

Running on live sites.

Already verified on live sites in Asia — the projects below are in Taiwan, deployed with BANFi Semiconductor Co., Ltd.

  • Hypermarket HVAC retrofit — 34 air handlers, Modbus RTU → Modbus TCP · Taoyuan
  • Semiconductor fabs — equipment energy and environmental monitoring · Taoyuan & Kaohsiung
  • Pharmaceutical plant — Modbus RTU sensors over Bluetooth Mesh, read as Modbus TCP
  • Street & road lighting — Bluetooth NLC dimming and fault reporting · Yilan
  • University campus — scheduled public-area lighting · Taipei
  • Business hotel — guestroom dimming with battery-free switches · Chiayi
100 m+Bluetooth range, line of sight
Depth 5DECT NR+ mesh, nine radios, verified on air
46 msBattery-free telegram, air to network, average
7patent filings — 4 published, 3 pending
The company

From a self-powered switch to a reliable mesh.

FL Semiconductor LLC (dba FLSEMI) integrates self-powered Bluetooth, Bluetooth Mesh, DECT NR+ and Thread into wireless modules and gateways — from the switch that needs no battery to the network that heals itself — with materials and expertise drawn from the US, Norway and Taiwan. Registered U.S. small business ↗ · UEI KRRRZ4V2BGW9 · CAGE 11U64.

LatestEdgeRouter User Manual v3.6 and hardware specification v3.2 · All news →

Nordic Semiconductor Solution Partner
FLSEMI office building, 400 W Emmett St, Kissimmee, Florida
Our office · 400 W Emmett St, Suite 13, Kissimmee, FL 34741 · Map ↗
Get in touch

Tell us what you are building.

The useful first message is a paragraph about the site: what you are measuring, what is already installed, where power and network reach, and the date that matters. We will tell you whether the standard build covers it or whether it needs engineering — and if it is covered, we will say so. Or write to hello@flsemi.us.

Request information
CT11-USB thermal core documentation, or export-controlled products
CT11-USB documentation (export-controlled)

The public specification page covers the camera in full. Interface documentation, the host command set and the SDK are export-controlled technical data: contact us, and they are released on receipt of the use-and-destination information below. This applies to every request, including domestic ones.

Use and destination

Some FLSEMI products are subject to export control — the CT11-USB thermal camera core under ECCN 6A003, and the DECT NR+ stack as encryption software. We need this before we can quote or release detailed technical data. It applies to every enquiry, including domestic ones.

🔒 Your information is kept strictly confidential and is never shared with third parties. We’ll only ever feature your deployment as a case study with your explicit consent.