STMicroelectronics – SPWF01Sx Serial-to-Wi-Fi Modules

The SPWF01SA and the SPWF01SC intelligent Wi-Fi modules represent a plug and play and standalone 802.11 b/g/n solution for easy integration of wireless Internet connectivity features into existing or new products.

Configured around a single-chip 802.11 transceiver with integrated PA and an STM32 32-bit microcontroller with an extensive GPIO suite, the modules also incorporate timing clocks and voltage regulators. Two different options exist based on the integrated Flash memory. The SPWF01Sx.2y orderable parts integrate 1.5 MB of Flash, while The SPWF01Sx.2y orderable parts integrate 512 kB of Flash.

The module is available either configured with an embedded micro 2.45 GHz ISM band antenna (SPWF01SA), or with an u.FL connector for external antenna connection (SPWF01SC).

With low power consumption and small form factor, the modules are ideal for fixed and mobile wireless applications, as well as challenging battery-operated applications.

The SPWF01Sx.y1 orderable parts are released with an integrated full featured TCP/IP protocol stack with added web server and additional application service capabilities. The SW package also includes an AT command layer interface for user-friendly access to the stack functionalities via the UART serial port.

Key Features:

  • 2.4 GHz IEEE 802.11 b/g/n transceiver
  • STM32 ARM Cortex-M3
  • Multiple Integrated Flash memory options:
  • 5 MB (SPWF01Sx.1y orderable parts)
  • 512 kB (SPWF01Sx.2y orderable parts)
  • 64 KB RAM memory
  • 32 kHz XTAL to support low power modes
  • 16 GPIOs, serial port (UART, SPI, I2C) interfaces available
  • Small form factor: 26.92 x 15.24 x 2.35 mm
  • Up to +18 dBm output power
  • Single voltage supply (3.3 V typ.)
  • Multiple antenna options:
  • Integrated antenna (SPWF01SA.xy versions)
  • Integrated U.Fl connector (SPWF01SC.xy versions)
  • Industrial operating temperature range
  • FCC/CE/IC certified
  • RoHS compliant
  • Surface mount PCB module


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