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PureFeather STM32WL

PureFeather STM32WL


Regular price $79.99 USD
Regular price Sale price $79.99 USD
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Getting started with the STM32WL now is easier thanks to the PureFeather STM32WL which is FeatherWing compatible. It integrates a powerful cortex M4 and M0 with a LoRa compatible radio and a user friendly pinout to make low power wireless devices quickly and easily. 

The STM32WL System-On-Chip integrates both a general purpose microcontroller and a sub-GHz radio (based-on Semtech SX126x) on the same chip. This chips meets the requirements of a wide range of Low-Power Wide Area Network (LPWAN) wireless applications in industrial and consumer Internet-of-Things (IoT).


  • Uses latest Zephyr Project for both the esp32-c3 as well as the stm32wl
  • Ultra low power consumption with stm32wl
  • Early Adopter utilizing a fully working Zephyr Project for Lora, WiFi, BLE, and sensors.

Possible Applications

  • Low power sensor reporting temperature, pressure, humidity over lora
  • Custom Lora USB/WiFi base station
  • Amazon sidewalk sensor
  • LoRaWAN®, Sigfox, W-MBUS, mioty connected sensor

Product Specifications

  • Feather size and pinout
    • 2.0" x 0.9" x 0.3" (51mm x 23mm x 8mm) without headers
  • STM32WL55
    • Low Power Arm Core, Lora, (G)FSK, (G)MSK, BPSK
    • 256kB Flash
    • 64 kB RAM
  • ESP32-C3
    • Single-core, 32-bit
    • 400KB of SRAM
    • Wi-Fi + Bluetooth/Bluetooth LE
  • IO
    • USB-C directly to ESP32-C3
    • ADC, DAC, SPI, UART, GPIO accessible on Feather Header
    • SMA Antenna Connector for for 915Mhz STM32WL
    • PUREmodules debug connector
    • TC2030-CTX-NL JTAG connection
  • Power
    • USB-C onboard Li-ion Charger
    • Li-ion Battery connector
    • On board 3.3V regulator
    • STM32WL power control of the esp32-c3 for low power battery applications
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