STM32WL3R: two-in-one wireless SoC for ultra-low-power remote controls
Compact, long-life RF solutions for remote controls
Compact, long-life RF solutions for remote controls
STM32WL3x MCUs combine an Arm Cortex®‑M0+ core with sub‑GHz radios supporting both multiple and custom modulations. This all-in-one SoC reduces design complexity while delivering long-rang connectivity and outstanding energy efficiency.
Designed specifically for remote control applications, the STM32WL3R introduces new ultra-low-power modes, six dedicated wake-up pins, additional RF band support, and up to 18 GPIOs for greater design freedom.
Key benefits
Longer battery lifetime
Ultra-low TX current (10 mA at 10 dbm) and new low power modes enable multi-year operation.
Flexible & multi-modulation
Supports global sub-GHz bands and a wide set of modulations, including IQ interface for custom modulation.
Reduced design complexity
Highly integrated SoC and single-ended RF architecture reduce external components and lower BOM costs.
Key features
- Arm® Cortex®-M0, up to 128 Kbytes of flash & 16 Kbytes of SRAM
- 5x5 mm application processor SoC
- SPI, I²C, USART, low-power UART, 12-bit ADC
- 2 general-purpose 16-bit timers, 4+1 PWMs, LP timer
- Watchdog timer, RTC, DMA controller with 8 channels
- RF bands: 315MHz, 433MHz, 868MHz, 915MHz/920 MHz
- Multiple modulation: 2/4(G)FSK, 2(G)MSK, OOK, ASK
- D-BPSK, DSSS and I/Q interface
- 450 nA ultra-deep-stop mode with SRAM retention
- 14 nA shutdown mode mode with up to 6 wakeup pin
Tailored for remote control applications
Garage openers
Call/bell systems
IoT for smart homes
Wireless key pads
SOMFY customer testimony
SOMFY customer testimony
To enhance the performance and reliability of their remote-control products, Somfy selected ST as their primary MCU supplier for next-generation motor and remote-control designs.
Why ST? Discover Somfy’s full STM32WL3R testimonial.
Getting started with STM32WL3R
Low-and high-band boards from $63.63
Affordable prototyping
Prototype sub-GHz apps with low-power boards in 433 MHz or 868/915/920 MHz versions.
Free embedded software
Simplify application development
Complete STM32WL3R firmware package with examples, including ultra-deep-stop mode.
Free STDES-WL3x designs
Accelerate product design
Multi‑band STM32WL3x reference designs (169–920 MHz) with up to 20 dBm output in QFN32/48.