The STM32 Nucleo-32 board provides a flexible way for users to try out new concepts and build prototype applications. The STM32 microcontroller in a 32-pin package offers various combinations of performance, power consumption and features.
The Arduino™nano connectivity makes it easy to expand the functionality of the STM32 Nucleo open development platform with a choice of specialized shields.
The STM32 Nucleo-32 board does not require any separate probe as it integrates the ST-LINK/V2-1 debugger/programmer.The STM32 Nucleo-32 board comes with the STM32 comprehensive software HAL library together with various packaged software examples.

Arduino™nano connectivity
on-board ST-LINK/V2-1 debugger/programmer
USB reenumeration capability: three different interfaces supported on USB: Virtual Com port, mass storage, debug port
Board power supply from USB VBUS or external source
Three LEDs for USB communication, power, and user application
Reset push button
mbed-enabled (mbed.org)
Supported by wide choice of Integrated Development Environments (IDE) including IAR™, Keil®, GCC-based IDE

STM32F0 Series 32-Bit ARM® Cortex®-M0 Microcontrollers, STMicroelectronics

The STM32 F0 Series of the 32-bit Flash Microcontrollers (MCUs) is based on the ARM Cortex™-M0 core; a core specifically developed for embedded applications. STMicroelectronics’s STM32 ARM Cortex™ M processor benefits from the Cortex-M0 architectural enhancements including digital signal processing, real-time performance, low voltage and low power. ST’s ARM® STM32 F0 mainstream series delivers a 32-bit performance and is ideal for small projects or platform decisions with its easy to use functionality.