The SPWF04 Wi-Fi module features a hardware cryptographic accelerator and an SPI port for faster host communications, according to STMicroelectronics. STMicroelectronics has introduced a cloud-compatible Wi-Fi module, the SPWF04, which integrates an ARM Cortex-M4 STM32 microcontroller with a set of multi-functional GPIOs and with 2MB on-chip Flash and 256Kbyte RAM for generous code and data storage.