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A Bluetooth Mesh and NLC stack we wrote ourselves.

FLSEMI's networked lighting control runs on Nordic's nRF5340 with a front-end module, carrying a Bluetooth Mesh and NLC Profile stack developed in-house with BANFi Semiconductor — not a licensed reference build. The models below are implemented on our own silicon platform and provisioned from a phone, with the cloud optional rather than required.

Nordic nRF5340 + FEM In-house Mesh / NLC stack Bluetooth SIG NLC Profile Self-powered switches Cloud optional

BFi53CVD Bluetooth NLC dimmer built on the nRF5340 platform

The Platform · Nordic nRF5340 + FEM

Silicon, radio and stack in one hand

Dual-core Cortex-M33 · front-end module · external antenna · Mesh DFU

Every FLSEMI lighting node — the BFi53CVD constant-voltage dimmer, the BFi53CCD constant-current dimmer and the BFi53ER0 EdgeBox — is built on the Nordic nRF5340 with a front-end module driving the radio to +12 dBm and better than 100 m node-to-node line of sight. Because the Mesh and NLC stack is ours rather than a licensed reference build, behaviour that normally sits behind a vendor's binary — provisioning flow, scene and schedule semantics, energy reporting, self-powered switch proxying — is ours to specify, debug and extend for a customer.

Radio platformNordic nRF5340 dual-core Cortex-M33 with front-end module (FEM)

TX power · range+12 dBm · > 100 m node-to-node LoS (dimmers); BFi53ER0 EdgeBox +13 dBm, Bluetooth 5.3 LE

StackBluetooth Mesh and NLC Profile, developed in-house by BANFi Semiconductor and FLSEMI

ProvisioningRemote provisioning · grouping · health monitoring — from the BANFi ONE iOS app

MaintenanceMesh DFU — over-the-air firmware update across the network, no rewiring or removal

CloudOptional — the network runs standalone. Scheduling uses GPS and network time held on the devices

AntennaExternal antenna, factory-integrated in the enclosure

RF certificationApplied for per project (NCC / CE / FCC / TELEC / RCM · Bluetooth), by target market and production version

Commercial lightingStreet lightingBuilding automationRetrofitIndustrial

What the stack implements

Bluetooth SIG NLC Profile models, on our own stack

Networked Lighting Control is a Bluetooth SIG profile, so a compliant node interoperates with other vendors' NLC devices. These are the models running in FLSEMI hardware today.

Server · BFi53CVD

Constant-voltage node

Basic Lightness Controller, Energy Monitor, Time, Schedule and Light Control models — 5-channel PWM, RGBCW / CCCCC / CWCWC / RGBCC modes.

Server · BFi53CCD

Constant-current node

Basic Scene Selector and Dimming Control, plus Energy Monitor, Time, Schedule and Light Control — dual channel, colour-tunable or dual-lightness.

Client · BFi53ER0 EdgeBox

Mesh client models

Generic OnOff and Level; Time, Scene and Schedule clients; Lightness, Light LC, CTL and HCL clients; Sensor client — the bridge to Modbus TCP and the BMS.

Energy harvesting

Self-powered proxy

Battery-free switches and occupancy / lux sensors are proxied straight into the mesh — 2 and 4-button switches, no battery and no wiring.

Lifecycle

Remote provisioning & DFU

Commission without touching each fixture, and push firmware across the network over Mesh DFU once the ceiling is closed.

Autonomy

Cloud optional

Grouping, scenes, schedules, health and sensor reporting are managed from the BANFi ONE iOS app against the devices themselves — GPS and network time, no subscription, no server to keep alive.

Self-powered battery-free wireless wall switch

Why self-powered matters in the US

NEC 2023 and the battery problem

Wall controls that cannot go dark when a battery dies

The 2023 National Electrical Code restricts wall-mounted lighting controls that depend on a battery alone, unless there is an automatic way to energise the lighting outlet when that battery fails — a rule aimed squarely at residential and hospitality spaces. Kinetic self-powered switches sidestep the question: they generate their own energy from the press, so there is no battery to fail, nothing to replace on a maintenance schedule, and no wiring to run. They mount on glass, tile or a partition, which is what makes wireless retrofit practical in a finished building.

No batteryNo wiringGlass / partition mountHospitalityRetrofit

Why this stack exists

Twenty years in one radio

FLSEMI's founder — Sog Yang, also Chief Technology Officer of BANFi Semiconductor — has worked on Bluetooth since graduate research at National Cheng Kung University. The early lighting work was built on GATT and the advertising channels, making fixtures controllable with what Bluetooth offered before a mesh existed at all, and it ran directly into the release of the Bluetooth Mesh Profile.

In 2014 he released what was then the world's first Bluetooth LE + Wi-Fi module on an ARM Cortex-M MCU. At Delta Electronics he went on to lead the Bluetooth SIG Mesh and Cortex-M4F software platform and the connected-lighting product line, taking Mesh from specification to AC-DC LED drivers shipping at industrial scale — and presenting the Bluetooth Mesh Profile lighting solution at the Bluetooth SIG forum in 2020. He then led the launch of high-reliability Bluetooth wireless MCU modules built on Nordic's nRF5340 with a front-end module — the same radio platform this page describes.

That arc is why the product line looks the way it does. Moving lighting control from AC-DC to DC-DC removes conversion stages, cuts the driver count and lets one dimmer serve several fixtures — and Bluetooth Mesh is what makes it controllable without running new wire. FLSEMI exists to bring that platform to the United States, to the infrastructure and everyday building stock that stands to gain most from it.

Field record

Deployed, and still running

The Bluetooth Mesh and NLC stack is developed and deployed by BANFi Semiconductor in Taiwan. FLSEMI is its North American arm and co-developer of the stack — FLSEMI's founder is BANFi's Chief Technology Officer, which is how the same platform is engineered on both sides. The installations below are BANFi's.

National museum · Taiwan MICHELIN-listed restaurant · Kaohsiung Lighting showroom · Taipei Cosmetics contract manufacturer · Pingtung Telecom group headquarters · Shanghai

Those commercial lighting projects were built on the previous-generation nRF52 platform. The current nRF5340 + FEM generation is in the field as a street-lighting deployment in Yilan, Taiwan — commissioned September 2024, 17 Bluetooth nodes with two NB-IoT gateways, and still operating after two typhoons.