SPWF01SA: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 comprehensive power management subsystem, and an STM32 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.1y 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 highly-efficient ISM band antenna (SPWF01SA), or with an u.fl connector for external antenna connection (SPWF01SC).

With low power consumption and ultra-compact (2.7 x 1.5 cm) footprint, the modules are ideal for fixed and mobile wireless applications, as well as challenging battery-operated applications.

The SPWF01Sx parts are released with an integrated full featured TCP/IP protocol stack with added web server and additional application service capabilities, such as REST API for accessing files on servers in the cloud and support for dynamic web pages with CGI/SSI functions to easily interact with the module and the host processor over the air.

For secure end-to-end communication with the cloud, an SSL/TLS stack is embedded in every module with no licensing charge. See application note AN4683 for details.

The SW package also includes an AT command layer interface for user-friendly access to the stack functionalities via the UART serial port. For details, see user manual UM1695.

It is always possible to upgrade the module firmware via UART and Over The Air (FOTA).

Out of the 1 MB extended Flash available on the SPWF01Sx.1y module, 512 KB of the Flash is dedicated to FW upgrade and the other 512 KB is dedicated to host proprietary files, organized in a file system image, accessible through the integrated web server.

FOTA is also possible with the SPWF01Sx.2y module, temporarily storing the FW in the external host Flash memory, if it exists.

ST may update the FW provided with the modules at any time. ST recommends that users regularly check for documentation and the current FW version available at www.st.com/wifimodules.

Key Features

  • 2.4 GHz IEEE 802.11 b/g/n transceiver
  • STM32 ARM Cortex-M3, with 64 KB RAM and 512 KB Flash memory
    • 1 MB extended Flash available on SPWF01Sx.1y
  • Integrated TCP/IP protocol stack
    • 8 simultaneous TCP or UDP clients and 1 socket server
    • 1 TLS/SSL socket client supporting up to TLS 1.2, including common encryption algorithms: AES (128, 256), hash (MD5, SHA-1, SHA-256) and public key algorithms (RSA, ECC)
    • Web server supporting dynamic web pages
    • RESTful API to get and post web content
  • WEP/WPA/WPA2 personal security
  • System modes: Station, IBSS, and miniAP (supporting up to 5 stations)
  • miniAP easily provisioned (SSID, PWD)
  • Fast Wi-Fi reassociation after reset
  • Firmware update via UART and Over The Air (FOTA); extended Flash on board with SPWF01Sx.1y
  • TX power
    • 18.3 dBm @ 1 Mbps DSSS
    • 13.7 dBm @ 54 Mbps OFDM
  • RX sensitivity
    • -96.0 dBm @ 1 Mbps DSSS
    • -74.5 dBm @ 54 Mbps OFDM
  • 16 configurable GPIOs available
  • UART interface to host system
  • Advanced low-power modes
    • Standby with RTC: 43 μA
    • Sleep connected (DTIM=1): 15 mA
    • RX traffic: 105 mA typical
    • TX traffic: 243 mA typical @ 10 dBm
  • Simple AT command set host interface through UART
  • Small form factor: 26.92 x 15.24 x 2.35 mm
  • Single voltage supply (3.3 V typical)
  • Multiple antenna options:
    • Integrated antenna (SPWF01SA.xy versions)
    • Integrated u.fl connector (SPWF01SC.xy versions)
  • Industrial temperature range: -40 °C to 85 °C
  • FCC/CE/IC/SRRC certified
  • RoHS compliant
  • Surface mount PCB module
产品规格
DescriptionVersionSize
DS10078: Serial-to-Wi-Fi b/g/n intelligent modules8.0518 KB
应用手册
DescriptionVersionSize
AN4902: SPWF01Sx – dynamic web pages1.01 MB
AN4683: Transport layer security protocol for SPWFxxx module2.01 MB
AN4965: WebServer on SPWF04S module1.0377 KB
AN4886: Wi-Fi module integration design guidelines1.0840 KB
用户手册
DescriptionVersionSize
UM1695: Command set reference guide for "AT full stack" for SPWF01Sx series of Wi-Fi modules7.0678 KB
手册
DescriptionVersionSize
Wireless connectivity for IoT applications2.02 MB
STM32 Open Development Environment
型号制造商Description
X-NUCLEO-IDW01M1STWi-Fi expansion board based on SWPF01SA module for STM32 Nucleo
Evaluation Tool Software
型号制造商Description
STSW-IDW002STHands on Wi-Fi firmware for STEVAL-IDW001V1
Wireless Connectivity Software
型号制造商Description
STSW-WIFI001AT full stack library package for the SPWF01Sx.11 series of Wi-Fi modules
STSW-WIFI002AT full stack library package for the SPWF01Sx.21 series of Wi-Fi modules
解决方案评估工具
型号制造商Description
STEVAL-3DP001V1STEvaluation board for 3D printer
STEVAL-IDI004V2STWireless Bridge 868 MHz
STEVAL-IDW001V1STWi-Fi daughterboard for STM32F0DISCOVERY
STEVAL-PCC018V1UART to USB bridge
样片和购买
型号PackagePacking TypeFLASH Size (Mb) (typ)Unit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
SPWF01SA.21RF MODULETray0.5--5A002A1A5A002A1AITALY
SPWF01SA.11RF MODULETray1.5--5A002A1A5A002A1AITALY
质量和可靠性
型号PackageGradeRoHS Compliance GradeMaterial Declaration**
SPWF01SA.21RF MODULEIndustrialEcopack1
SPWF01SA.11RF MODULEIndustrialEcopack1
Serial-to-Wi-Fi b/g/n intelligent modules SPWF01SC
SPWF01Sx – dynamic web pages SPWF01SC
Transport layer security protocol for SPWFxxx module SPWF01SC
WebServer on SPWF04S module SPWF01SC
Wi-Fi module integration design guidelines SPWF01SC
Command set reference guide for "AT full stack" for SPWF01Sx series of Wi-Fi modules SPWF01SC
ST7540 power line modem firmware stack STEVAL-IHP005V1