SPWF04SA, SPWF04SC Datasheet Standalone and Serial-to-Wi-Fi b/g/n intelligent modules Features 2.4 GHz IEEE 802.11 b/g/n transceiver High performance STM32F439 ARM Cortex -M4 256 kB SRAM 2 MB embedded high-speed Flash memory 1 MB Flash memory for user storage, extendable via SD/MMC interface or external SPI Flash Integrated TCP/IP protocol stack 8 simultaneous TCP or UDP clients and 2 socket servers (supporting up to 8 clients each) Secured socket and upper layers (i.e. HTTPS) supporting up to TLS 1.2, including X.509 Certificates, AES (128, 256), hash (MD5, SHA-1, SHA-256, SHA-384) and public key algorithms for key exchange (RSA, DH, ECDH) and digital signature (RSA, ECDSA). Web server supporting SSI Open, WEP, WPA2 PSK, WPA2 enterprise WPS for station System modes: station, IBSS, and miniAP (supporting up to 5 stations) miniAP easily provisioned (SSID, PWD) Fast Wi-Fi re-association after reset Secure Firmware and FileSystem updates Over-The-Air (OTA) Product status link TX power SPWF04SA, SPWF04SC 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 21 configurable GPIOs available UART and SPI interface to host system Advanced low-power modes Standby with RTC: 43 A Sleep = 3 mA Idle connected (DTIM=1) = 5 mA RX traffic 105 mA typical TX traffic 260 mA typical 10 dBm AT command set interface through UART SPI interface with simple protocol Application subsystem Embedded real-time MicroPython environment for customer applications and on-board development MicroPython API library for easy access to Wi-Fi subsystem capabilities and device peripherals (i.e. UART, SPI, IC) Small form factor: 26.92 x 15.24 x 2.35 mm DS11839 - Rev 6 - October 2018 www.st.com For further information contact your local STMicroelectronics sales office.SPWF04SA, SPWF04SC Single voltage supply (3.3 V typical) Antenna options: integrated antenna/U.FL connector Industrial temperature range: -40 C to 85 C FCC/CE/IC certified RoHS compliant Applications Smart appliances Industrial control and data acquisition Home automation and security systems Wireless sensors Cable replacement Medical equipment Machine-to-machine communication DS11839 - Rev 6 page 2/27