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The X-NUCLEO-IDW04A1 Wi-Fi evaluation board is based on the SPWF04SA module and expands the STM32 Nucleo portfolio. The SPWF04SA module has an embedded STM32 MCU, a low-power Wi-Fi b/g/n SoC with integrated power amplifier and power management, and an SMD antenna. The SPWF04SA module relies on 2 MB MCU internal Flash. 1 MB of the internal Flash is for storing the user file system and to perform secure firmware update over the air (FOTA). A hardware interface allows the use of external memory to extend file system storage capability with no size limit. The firmware includes a complete IP stack, dynamic web pages with SSI to interact with the module and a REST API (get & post) for conveniently transferring files to and from servers in the cloud. The module can simultaneously behave as a socket server and socket client. The firmware supports secure sockets with TLS encryption, ensuring secure end-to-end communications with the cloud. The X-NUCLEO-IDW04A1 interfaces with the MCU on the STM32 Nucleo board via the UART serial port and SPI interface.
Key Features
- Based on SPWF04SA Wi-Fi module
- SPWF04SA module major characteristics:
- Low power IEEE 802.11 b/g/n transceiver
- Integrated SMD antenna
- STM32 ARM Cortex®-M4, with 256 KB SRAM and 2 MB Flash memory
- 1Â MB Flash memory for user storage, extendable via SD/MMC interface or external SPI Flash
- Integrated protocol stacks: TCP/IP (eight simultaneous TCP/UDP clients and two socket servers supporting up to eight clients each), TLS1.2
- Application layer functions: web server supporting dynamic web pages
- Open, WEP, WPA2 Personal, WPA2 Enterprise Security
- WPS for station
- System modes: station, IBSS, and miniAP (with up to five client STAs)
- Firmware and FileSystem updates via UART and (secure) over the air (OTA)
- 19 configurable GPIOs available
- Advanced low-power modes
- Simple AT command set host interface through UART, or equivalent proprietary protocol over SPI
- Embedded real-time microPython environment for customer applications and on-board development
- Compatible with STM32 Nucleo boards
- Equipped both with Arduino® UNO R3 and (optional) ST morpho connector
- Scalable solution; can cascade multiple boards for larger systems
- Free development firmware library and examples, compatible with STM32Cube
- X-NUCLEO-IDW04A1 hosts FCC, IC and CE certified SPWF04SA module
- RoHS compliant
Featured Videos
Guided tour into STM32 ODE and how it can help developers turn bright ideas into great products
The STM32 Open Development Environment is a flexible, easy and affordable way to develop innovative devices and applications. It is based on STM32 Nucleo boards and STM32Cube software.
Embedded Software
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Picture Part number Manufacturer Description 
X-CUBE-WIFI1 ST Wi-Fi software expansion for STM32Cube Part NumberWi-Fi software expansion for STM32Cube
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Evaluation Tools
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Picture Part number Manufacturer Description 
NUCLEO-F401RE ST STM32 Nucleo-64 development board with STM32F401RE MCU, supports Arduino and ST morpho connectivity 
NUCLEO-F411RE ST STM32 Nucleo-64 development board with STM32F411RE MCU, supports Arduino and ST morpho connectivity 
NUCLEO-L476RG ST STM32 Nucleo-64 development board with STM32L476RG MCU, supports Arduino and ST morpho connectivity Part NumberSTM32 Nucleo-64 development board with STM32F401RE MCU, supports Arduino and ST morpho connectivity
STM32 Nucleo-64 development board with STM32F411RE MCU, supports Arduino and ST morpho connectivity
STM32 Nucleo-64 development board with STM32L476RG MCU, supports Arduino and ST morpho connectivity
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Picture Part number Manufacturer Description 
STEVAL-PCC018V1 -- UART to USB bridge Part NumberUART to USB bridge
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Quality and Reliability
| Part Number | Marketing Status | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|
| X-NUCLEO-IDW04A1 |
NRND
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Ecopack2 |
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X-NUCLEO-IDW04A1
Package:
Ecopack2Material Declaration**:
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Order from Distributors | Order from ST | Core Product | Marketing Status | Supplier | ECCN (US) | ECCN (EU) | Board production status | Country of Origin | Budgetary Price (US$)*/Qty | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| X-NUCLEO-IDW04A1 | No availability of distributors reported, please contact our sales office | Buy now | SPWF04SA |
NRND
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ST | 5A002A1 | 5A002A1 | Temporary out of stock | ITALY | 24.0 / 1 |
(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors
