WF121 Wi-Fi® Module

The Wi-Fi Module for IoT Applications

Bluegiga's WF121 is a stand-alone Wi-Fi module providing fully integrated 2.4 GHz 802.11 b/g/n radio, TCP/IP stack and a 32-bit microcontroller (MCU) platform for embedded applications requiring simple, low-cost and low-power wireless IP connectivity. It also provides flexible peripheral interfaces such as SPI, I2C, ADC, GPIO, and timers to connect various peripheral interfaces directly to the WF121 Wi-Fi module.

The WF121 Wi-Fi module also allows end-user applications to be embedded onto the on-board 32-bit MCU, using a simple BGScript™ scripting language and free-of-charge development tools. This eliminates need for and additional MCU and enables end users to develop smaller and lower cost Wi-Fi devices. The WF121 can also be used in modem-like mode in applications where the external MCU is needed. The 802.11 access point and HTTP server functionality is also included for easy configurations and direct connections with phones, tablets, and PCs.

With an integrated 802.11 radio, antenna, single power supply, and CE, FCC, and IC regulatory certifications, the WF121 provides low-risk and fast time-to-market for applications requiring Wi-Fi connectivity.

Module Benefits

  • Small, stand-alone 802.11 b/g/n module with radio, antenna, and 32-bit MCU
  • Long range provided by excellent radio performance
  • Embedded TCP/IP and 802.11 MAC stacks
  • On-board end-user applications enabled by BGScript™
  • Industrial specifications, long lifetime and future proof solution
  • Regulatory qualifications, thus reducing R&D risk, costs, and time-to-market

Module Specifications

    Radio Features:
  • IEEE 802.11 b/g/n radio
  • 2.4 GHz frequency band
  • Transmit power: +16 dBm
  • Receiver sensitivity: -97 dBm
  • Integrated antenna or U.FL connector
    Wi-Fi Features:
  • Client mode support
  • Access Point mode up to five clients
  • WPA2, WPA and WEP encryption
  • Wireless Protected Setup (WPS)
    Hardware Features:
  • UART, USB, and SPI host interface
  • SPI, I2C, PWM, UART, GPIO, and AIO peripheral interfaces
  • Real Time Clock (RTC)
  • RMII interface for Ethernet connectivity
  • SD card interface
  • Temperature range: -40°C to +85°C
  • Dimensions: 15.4 x 26.2 x 2.0 mm
    MCU Features:
  • 80 MHz
  • 128 kB RAM
  • 512 kB Flash
    Software Features:
  • Embedded Bluegiga Wi-Fi stack
  • Embedded IP stack
  • TCP and UDP
  • Built-in HTTP server
  • DHCP and DNS
  • mDNS client
  • BGAPI™ host protocol
  • BGScript™ programming for standalone applications
  • CE
  • FCC
  • IC

Getting Started with WF121 Wi-Fi Module

WF121 Wireless Development Kit

The easiest way to begin development with WF121 is with the WF121 Wireless Development Kit.


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Title Version Resource Type
Wi-Fi Software and SDK Presentation 2 Presentations
WF121 Wi-Fi Module Presentation 2 Presentations
WF121 Canada Certificate and Report Miscellaneous
WF121 KCC Report and Certificate Miscellaneous
WF121-E ATEX Data Miscellaneous
WF121 CE Test Reports and DoC Miscellaneous
WF121 MTBF Prediction Report Miscellaneous
WF121 FCC Reports and Grant Miscellaneous
WF121 Japan Report and Certificate Miscellaneous
Bluegiga Wi-Fi Software: Example Applications, Configurations, and Demos Miscellaneous
WF121-A ATEX Data Miscellaneous
AN0822: Simplicity Studio™ User's Guide 0.5 Application Notes
AN1121: Headless Builds with Simplicity Studio v4 0.1 Application Notes
Wireless Selector Guide 7 Brochures
UG103.16: Multiprotocol Fundamentals 0.3 User's Guides
AN1160: Project Collaboration with Simplicity Studio 0.2 Application Notes
Wi-Fi Ultralibrarian CAD Footprints and Symbols 1.10 Schematic & Layout Files
Wi-Fi Ultra Librarian Manifest 1.10 Schematic & Layout Files
PB #1701101: New Module Tracecodes Addendum to PB 1606281 Product Change Notifications (PCN)
PB #1606281: Addendum to Bulletin 1603142 Product Change Notifications (PCN)
PB 1603142 Additional assembly test ship site and trace codes for BLE113 BGM111 WT12 BT121 WF121-A WF111-A Product Change Notifications (PCN)
PB #1611163: Additional assembly test ship site for WF121-E Product Change Notifications (PCN)
PB #1503301: Bluegiga for Label and Document Change Product Change Notifications (PCN)
Wireless IoT Modules Master Errata for Shield Marking 1.0 Errata
AN1001: WF121 to WGM110 Migration Guide 1.1 Application Notes
AN1023: Wi-Fi Software v.1.3 HTTP Server Usage 1.0 Application Notes
AN997: Ethernet to Wi-Fi Bridge Mode WF121 Module App Note 1.2 Application Notes
AN998: WF121 Standalone Wi-Fi Access Point and HTTP Server 1.1 Application Notes
AN1024: Wi-Fi Software v.1.3 Ethernet Usage 1.3 Application Notes
WF121 Development Kit V.1.3.1 Data Sheet 1.1 Data Sheets
WF121 Wi-Fi Module Data Sheet 2.0 Data Sheets
UG221: WF121 Configuration Developer Guide 3.0 User's Guides
Bluegiga Wi-FI Software API Reference Manual Version 1.7 1.7
Bluegiga Wi-FI Software API Reference Manual Version 2.2 2.2
UG207: BGSCRIPT for Wi-Fi Developer Guide 1.9 User's Guides
UG222: Bluegiga Wi-Fi Products 1.2 User's Guides
UG223: Wi-Fi GUI Software User Guide 1.6 User's Guides
UG224: WrapFinder User Guide 1.0 User's Guides
Bluegiga Wi-Fi Software and SDK v.1.2.4 1.2.4 Software
Bluegiga Wi-FI Software API Reference Manual Version 3.0 3.0
WF121 Development Kit Design Material Reference Designs
Bluegiga Wi-Fi Software and SDK v.1.3.0 1.3.0 Software
PICKit 3 Programmer Software Software
Bluegiga Wi-Fi Software and SDK v.1.4.0 1.4.0-88 Software
Bluegiga Wi-Fi Software and SDK v.1.4.1 1.4.1 Software
Bluegiga Wi-FI Software 1.4.1-91 Software
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