Summary of STM32WB FEATHER DEVELOPMENT BOARD WITH STM32WB55 BLUETOOTH 5.0 SOC SELLS FOR $45
Reclaimer Labs introduced the STM32WB Feather, an Adafruit-standard development board featuring the STM32WB55CG SoC. This chip combines a 64MHz Arm Cortex-M4 main processor with a 32MHz Cortex-M0+ co-processor for Bluetooth 5.0. Designed for IoT efficiency, it integrates all wireless and microcontroller functions into one unit to save space and reduce power consumption. The board includes 1MB flash, 256kB SRAM, an on-board antenna, extensive I/O options, and robust embedded security features like AES encryption.
Parts used in the STM32WB Feather:
- STM32WB55CG SoC
- 64MHz Arm Cortex‐M4 processor
- 32MHz Cortex‐M0+ co-processor
- STM32WBCGU6 Bluetooth SoC
- 1MB flash memory
- USB ROM bootloader
- 256kB SRAM
- On-board chip antenna
- 6x analog input pins
- UART interface
- I2C interface
- SPI interface
- 7x digital GPIO pins
- 256-bit AES hardware encryption
- PCROP read/write protection
- JTAG fuse
- Public-key cryptography elliptic curve encryption engine
Reclaimer Labs has launched an STM32WB Feather development board that is based on STMicro’s first wireless STM32 MCU which was announced sometime around last year.

The STM32WB Feather board like other development boards in the STM32 family of wireless MCUs is built around the STM32WB55CG SoC which includes an 64MHz Arm Cortex‐M4 running as the main processor along with a 32MHz Cortex‐M0+ as a co-processor for Bluetooth.
The STM32WB Feather board in Adafruit feather standard, has an STM32WBCGU6 Bluetooth SoC at its core alongside other wireless and ultra-low-power features. One advantage this new line of IoT SoC has over others is that of size and space. The chipset integrates everything together into a single chip, so there’s no need for separate chips for microcontroller and radio. It can also achieve lower power sleep states thus making the board efficient at low power.
The chipset has 1MB of flash memory that is shared between the main and co-processors, a USB ROM bootloader, and 256kB of SRAM, while the board itself is equipped with an on-board chip antenna that radiates high – frequency electromagnetic waves, a wide variety of I/O, including 6x analog input pins, UART, I2C, and SPI, plus 7x digital GPIO pins.
The STM32WB Feather board also possesses embedded security hardware functions like 256-bit AES hardware encryption, PCROP read/write protection, JTAG fuse, and public-key cryptography with an elliptic curve encryption engine.
Read more: STM32WB FEATHER DEVELOPMENT BOARD WITH STM32WB55 BLUETOOTH 5.0 SOC SELLS FOR $45
- What is the main processor speed of the STM32WB55CG SoC?
The main processor is a 64MHz Arm Cortex‐M4. - Can this board achieve lower power sleep states?
Yes, the chipset can achieve lower power sleep states making the board efficient at low power. - Does the STM32WB require separate chips for the microcontroller and radio?
No, the chipset integrates everything together into a single chip so there is no need for separate chips. - How much flash memory does the chipset have?
The chipset has 1MB of flash memory that is shared between the main and co-processors. - What security hardware functions are embedded in the board?
It possesses 256-bit AES hardware encryption, PCROP read/write protection, JTAG fuse, and public-key cryptography with an elliptic curve encryption engine. - How many analog input pins are equipped on the board?
The board is equipped with 6x analog input pins. - What type of antenna is included on the board?
The board is equipped with an on-board chip antenna that radiates high–frequency electromagnetic waves. - Is the STM32WB55CG SoC suitable for Bluetooth applications?
Yes, it includes a 32MHz Cortex-M0+ as a co-processor specifically for Bluetooth.
