Introduction
The SPWF04Sx series of Wi-Fi modules integrate a complete TCP/IP protocol stack and a rich set of applications including, but
not limited to, web server, web client RESTful API, TFTP, MQTT and SMTP.
Security is added in the multiple layers of Wi-Fi and peer-to-peer protocols. The stack implements the WPS protocol, WPA2 in
both the Personal and Enterprise options, and the TLS for end-to-end secure transactions.
Users access the features of the SPWF04Sx modules via UART using the simple AT command syntax, or via SPI using a
custom packet format and protocol.
To enable a complete customization of the application on the module, the SPWF04Sx software integrates a MicroPython
interpreter that provides the user with MicroPython standard libraries and a customized set of classes to export the specific
SPWF04Sx features.
The diagram below summarizes the possible integrations of an SPWF04Sx module in a target application.
Figure 1.
SPWF04Sx user integration modes
This user manual is intended as a guide to the set of commands available on the UART or the SPI console. A description and
explanation of the configuration variables, status variables and asynchronous indication messages is available in the Appendix
of the manual.
This manual is not intended as a technical guide of Wi-Fi and TCP/IP, or other technologies available in the module.
TCP/IP protocol stack for SPWF04Sx Wi-Fi modules
UM2114
User manual
UM2114
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Rev 3
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November 2018
For further information contact your local STMicroelectronics sales office.
www.st.com
