STM32 is a family of 32-bit microcontroller and microprocessor integrated circuits by STMicroelectronics. STM32 microcontrollers are grouped into related series that are based around the same 32-bit ARM processor core: Cortex-M0, Cortex-M0+, Cortex-M3, Cortex-M4, Cortex-M7, Cortex-M33, or Cortex-M55. From Wikipedia
