: Every board includes an ST-LINK debugger/programmer , meaning no separate external probe is required for flashing or debugging code.
: Boards can be powered via USB , an external power supply, or specialized input pins. 3. Software & Ecosystem STM32в„ў Nucleo boards
Because they share the Arduino-compatible layout, Nucleo boards are often recommended as the next step for users transitioning from to more professional 32-bit ARM Cortex-M microcontrollers. STM32 Nucleo boards - STMicroelectronics : Every board includes an ST-LINK debugger/programmer ,