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STMicroelectronics SPWF01SA.11
- Part No.:
- SPWF01SA.11
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver Modules and Modems
- Package:
- Module
- Datasheet:
-
SPWF01SA.11.pdf
- Description:
- RF TXRX MODULE WIFI CHIP SMD
- Quantity:
- Payment:
- Shipping:
Inventory:3,205
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Product details
Overview
SPWF01SA.11 from STMicroelectronics is a certified 802.11b/g/n Wi-Fi module with integrated TCP/IP stack, AT command interface, and embedded HTTP server/client functionality. It operates in 2.4 GHz ISM band, supports WPA/WPA2 security, delivers up to +18 dBm transmit power, and integrates GPIO, ADC, DAC, and PWM peripherals for host-agnostic control. It is deployed in industrial IoT gateways for secure over-the-air firmware updates and local web-based configuration.
For engineers reviewing the SPWF01SA.11 datasheet, SPWF01SA.11 pinout, SPWF01SA.11 application, or SPWF01SA.11 equivalent, key selection considerations include UART-based AT command compatibility, TLS certificate management (AT+S.TLSCERT), HTTPD filesystem update capability (AT+S.HTTPDFSWRITE), and hardware-assisted low-power modes (CFUN=2/3/4) confirmed in UM1695 Rev 8.
Technical Context
The SPWF01SA.11 implements a full-stack firmware image running on an internal ARM Cortex-M microcontroller, exposing standardized AT commands over UART for network setup, socket management, TLS provisioning, and peripheral I/O control. It supports infrastructure and soft-AP modes, with asynchronous WIND indications for real-time event reporting including connection status, reset events, and peer association changes.
Its architecture separates host-facing AT command parsing from underlying Wi-Fi MAC/PHY operations, enabling deterministic response timing and reliable command queuing during active data transfers. Configuration variables (e.g., wifi_ssid_len, ip_ipaddr) and status variables (e.g., system_uptime, wifi_state) are stored in non-volatile memory and accessible via AT+S.GCFG/AT+S.STS, with factory defaults restored using AT&F.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Wi-Fi Standard | IEEE 802.11b/g/n, 2.4 GHz ISM band - enables interoperability with legacy and modern access points without external RF tuning. |
| Transmit Power | +18 dBm maximum - ensures robust link budget in noisy industrial environments with metal enclosures or long-range sensor nodes. |
| Security Support | WPA/WPA2-PSK, TLS 1.2 with configurable CA/cert/key storage - meets baseline requirements for secure cloud connectivity and OTA firmware validation. |
| Interface | UART (up to 115.2 kbps, hardware flow control optional) - eliminates need for USB-to-serial bridges and simplifies integration with STM32, ESP32, or PIC hosts. |
| Integrated Peripherals | GPIO0–GPIO15, ADC on GPIO8, DAC on GPIO15, PWM on GPIO1 - allows direct sensor readout, actuator control, and status indication without external components. |
| Firmware Update | HTTP-based (AT+S.HTTPDFSUPDATE), UART-based (AT+S.HTTPDFSWRITE), and remote (AT+S.FWUPDATE) - enables field-upgradable web UI, static content, and full firmware images. |
| Power Modes | Active, Power Save (PS/Fast PS), Sleep, Standby (CFUN=0–4) - provides selectable trade-offs between latency, current draw (μA–mA range), and wake-up responsiveness. |
Pinout & Package
SPWF01SA.11 uses a 24-pin LGA package (13.5 mm × 11.5 mm × 2.2 mm) with exposed thermal pad. Pin functions are defined per UM1695 Section 2.36–2.38 and validated against ST's official SPWF01Sx hardware user manual (AN4574).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Supply voltage input | 3.3 V ±5 % main power rail; requires local 10 μF ceramic decoupling for Wi-Fi burst current stability. |
| GND | Ground reference | Common return path for RF/analog/digital sections; must be connected to low-impedance ground plane under module. |
| UART_TX | Serial output from module | CMOS-level TX signal (3.3 V logic) feeding host MCU RX; no level-shifting needed for STM32/ESP32. |
| UART_RX | Serial input to module | CMOS-level RX signal (3.3 V tolerant); accepts standard UART framing (8N1, no parity). |
| GPIO0 | Factory reset trigger | Pulled high at power-on to initiate hardware factory reset of NV settings - critical before FW update. |
| GPIO1 | PWM output | Configurable frequency/duty-cycle output (AT+S.PWM) for LED dimming or motor speed control. |
| GPIO8 | ADC input | 10-bit analog input (AT+S.ADC) supporting temperature, voltage, or sensor signal monitoring. |
| GPIO15 | DAC output | Configurable 8-bit DAC (AT+S.DAC) for analog waveform generation or calibration reference. |
Key Features
| Feature | Design Value |
|---|---|
| AT Full Stack Command Set | 100+ standardized AT commands (e.g., AT+S.SOCKON, AT+S.HTTPGET) enable rapid prototyping without custom driver development. |
| Embedded Web Server (HTTPD) | On-module static file system (flash-resident) serves HTML/CSS/JS pages; updated via UART or HTTP GET - eliminates external web server dependency. |
| TLS Certificate Management | Secure storage and runtime loading of CA, client cert, and private key (AT+S.TLSCERT) - required for mutual TLS authentication with cloud platforms. |
| Asynchronous Event Reporting | WIND indications (e.g., +WIND:10:Connected) deliver real-time network state changes without polling - reduces host CPU overhead and latency. |
| Low-Power Operation | Four distinct power states (CFUN=0–4) with sub-mA sleep current and <100 ms wake-up time - extends battery life in remote sensor deployments. |
Applications
| Industrial Gateway | Smart Building Sensor Node |
|---|---|
|
Use Scenario: Edge gateway aggregating Modbus RTU data from PLCs and forwarding to MQTT broker via TLS-secured Wi-Fi. IC Role / Device Role / Timing Role: Wi-Fi network interface and TCP/IP protocol handler; manages socket lifecycle, TLS handshake, and packet retransmission timing. Use Value: Eliminates need for external Wi-Fi SoC and TCP/IP stack porting; AT+S.SOCKON/AT+S.SOCKW provide deterministic socket write timing within 50 ms. |
Use Scenario: Battery-powered CO₂ and temperature sensor transmitting readings hourly to AWS IoT Core. IC Role / Device Role / Timing Role: Low-power connectivity engine; enters CFUN=3 sleep mode between transmissions and wakes on RTC alarm. Use Value: Achieves >2-year battery life using AT+CFUN=3 and AT+S.SETTIME-synchronized wake cycles; ADC on GPIO8 reads analog sensor directly. |
| Medical Device Configuration Portal | Asset Tracking Tag |
|
Use Scenario: Portable ultrasound device with captive portal for on-site Wi-Fi credential entry and firmware update. IC Role / Device Role / Timing Role: Soft-AP controller and embedded HTTP server; hosts configuration page and handles POST requests via AT+S.HTTPPOST. Use Value: Enables zero-touch setup without mobile app; AT+S.HTTPD and AT+S.FSC/AT+S.FSP allow dynamic web UI updates without reflashing. |
Use Scenario: GPS-enabled logistics tag sending location snapshots to Azure IoT Hub over public hotspots. IC Role / Device Role / Timing Role: Roaming Wi-Fi client; performs periodic AT+S.SCAN and AT+S.ROAM to maintain AP association across venues. Use Value: Maintains connectivity in transient environments using adaptive scan intervals and fast reassociation - verified in UM1695 Section 2.35. |
Availability
SPWF01SA.11 is available at Aetrix Electronics and suitable for industrial IoT gateways, smart building sensor nodes, medical device configuration portals, and asset tracking tags requiring stable component supply and long-term firmware support.
Supply support for SPWF01SA.11 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, sensors, power ICs, and wireless solutions for industrial, automotive, and consumer markets.
The SPWF01Sx series was developed as a certified, drop-in Wi-Fi connectivity solution targeting resource-constrained embedded systems needing minimal host processing overhead and rapid time-to-market - with SPWF01SA.11 representing the final production revision supporting full TLS and HTTPD features.
FAQ
What is the difference between SPWF01SA.11 and earlier SPWF01Sx revisions?
SPWF01SA.11 is the final hardware revision of the SPWF01Sx family, adding support for TLS certificate management (AT+S.TLSCERT), domain name verification (AT+S.TLSDOMAIN), and HTTPD filesystem updates via UART (AT+S.HTTPDFSWRITE). Earlier revisions like .01 or .02 lack these commands and do not support TLS 1.2 handshake completion per UM1695 Table 1 footnote 3.
Does SPWF01SA.11 require an external microcontroller to operate?
No - SPWF01SA.11 contains an integrated ARM Cortex-M processor running the full AT command firmware. It operates autonomously when configured via UART; a host MCU is only required for command initiation, data exchange, or GPIO coordination - not for Wi-Fi protocol handling or TCP/IP stack execution.
How is factory reset performed on SPWF01SA.11?
A hardware factory reset is triggered by holding GPIO0 high during power-on, before the +WIND:1:Poweron indication appears. This erases all non-volatile configuration variables and restores defaults. Software reset via AT&F writes defaults to flash but does not clear persistent TLS certificates unless followed by AT+S.TLSCERT2=clean,all.
Can SPWF01SA.11 function as both a Wi-Fi client and access point simultaneously?
No - SPWF01SA.11 supports either infrastructure mode (client connecting to AP) or soft-AP mode (hosting miniAP for clients), but not concurrent dual-role operation. Mode selection is controlled via AT+S.WIFI and AT+S.SSIDTXT configuration; switching requires module reset and cannot occur dynamically during active socket sessions.
SPWF01SA.11 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- Module
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- RF Family/Standard:
- WiFi
- Protocol:
- 802.11b/g/n
- Modulation:
- DSSS, OFDM
- Frequency:
- 2.4GHz
- Data Rate:
- 65Mbps
- Power - Output:
- 18.3dBm
- Sensitivity:
- -96dBm
- Serial Interfaces:
- UART
- Antenna Type:
- Integrated, Chip
- Utilized IC / Part:
- -
- Memory Size:
- 1.5MB Flash, 64kB RAM
- Voltage - Supply:
- 3.3V
- Current - Receiving:
- 105mA
- Current - Transmitting:
- 210mA ~ 344mA
- Mounting Type:
- Surface Mount
- Operating Temperature:
- -40°C ~ 85°C
SPWF01SA.11 FAQ
1.How can I place an order for SPWF01SA.11 through Aetrix?
Please submit a Request for Quotation (RFQ) for SPWF01SA.11 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SPWF01SA.11 reliable?
The price and inventory of SPWF01SA.11 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SPWF01SA.11 is usually 5 days.
3.What payment methods are accepted for SPWF01SA.11?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SPWF01SA.11 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SPWF01SA.11?
SPWF01SA.11 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SPWF01SA.11 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SPWF01SA.11?
For technical support, including SPWF01SA.11 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SPWF01SA.11 requirements.
6.How does Aetrix verify that SPWF01SA.11 is sourced from the original manufacturer or authorized distributors?
All SPWF01SA.11 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SPWF01SA.11 meets industry standards.
7.What is the process for return or replacement of SPWF01SA.11?
All SPWF01SA.11 units undergo pre-shipment inspection (PSI). If there is an issue with SPWF01SA.11, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SPWF01SA.11 part is unused and in its original packaging.
Return procedure for SPWF01SA.11:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SPWF01SA.11 Tags
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ESP32-C3FH4
Espressif Systems
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ESP32-S2FH4
Espressif Systems
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ESP32-S2FN4R2
Espressif Systems
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ESP32-C3-MINI-1-N4
Espressif Systems
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ESP32-C3-WROOM-02-N4
Espressif Systems
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ESP32-C3-MINI-1U-N4
Espressif Systems
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ESP32-C3-MINI-1U-H4
Espressif Systems
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ESP32-C3-WROOM-02U-N4
Espressif Systems
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ESP32-H2-MINI-1-N4
Espressif Systems
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ESP32-H2-MINI-1-H4
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ESP32-MINI-1-N4
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ESP32-S2-MINI-2-N4R2
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