STMicroelectronics – Smart home lighting demo board provides RF connection to wireless sensors and controllers


STMicroelectronics’ STEVAL-ILL082V1 evaluation board is a demonstration design for smart home LED lighting that needs a wireless connection to other devices such as a home automation controller.

The main elements of the STEVAL-ILL082V1 board are the HVLED815PF offline LED driver and the SPSGRF-868, a low-power programmable RF transceiver module operating at a frequency of 868MHz.

The interface between the HVLED815PF and the SPSGRF-868 is managed by an STM32L0 microcontroller, which is based on an Arm® Cortex®-M0+ core. The MCU and RF module both draw their power from the LED driver via an auxiliary winding.

ST supplies the STEVAL-ILL082V1 with a firmware package, the STSW-ILL082V1. The software runs on the STM32L0 MCU, and includes the drivers required for interfacing with the HVLED815PF LED driver and the SPSGRF-868 RF module. The software is built on STM32Cube software technology to ease portability across the portfolio of STM32 microcontrollers.

ST provides sample applications which can receive commands from the STEVAL-IDI005V1 wireless sensor board for remote LED light switching and dimming.

The board can also be made visible to cloud applications with the addition of a wireless bridge.


  • LED driver:
    - 10W flyback converter with quasi- resonant operation
    - Primary-side regulation: no optocoupler is required
    - High power factor and low distortion
    - Manages open and short circuits
    - ±1% LED current regulation
    - Dimming range: 2.5% to 100%
  • Wireless module:
    - On-board antenna
    - – CE certified


  • IoT end nodes
  • User interface in home appliances


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