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UG291: WGM110 Wi-Fi® Expansion Kit
User's Guide
The WGM110 Wi-Fi Expansion Kit is an excellent way to explore
and evaluate the WGM110 Wi-Fi Module with an EFM32 MCU for
your embedded application.
The kit contains a Wireless Expansion Board (BRD8016A) and a WGM110 Wi-Fi Mod-
ule Radio Board (BRD4320A). The WGM110 Wi-Fi Module is an easy to use and easy
to interface Wi-Fi Network Co-Processor (NCP). Most of the associated complexity of
Wi-Fi and the protocol stack is offloaded to the module and allows for easy Wi-Fi inte-
gration into any embedded system.
The kit easily integrates and brings Wi-Fi connectivity to a compatible Silicon Labs
MCU Starter Kit through the expansion header. The Wireless Expansion Board has al-
so been designed after the Raspberry Pi Hardware Attached on Top (HAT) board speci-
fication, allowing the WGM110 Wi-Fi Expansion Kit to connect to a Raspberry Pi.
silabs.com | Building a more connected world.
WIRELESS EXPANSION BOARD FEATURES
• EXP connector for interfacing Silicon
Labs Starter Kits
• Common feature set, including SPI,
UART, and I2C
• Allows board detection and
identification
• Radio Board connectors for inserting
Silicon Labs Wireless Radio Boards
• Mini Simplicity debug connector
• Supports programming and debugging
the module firmware
• LDO for high-power radio boards
• Raspberry Pi compatible HAT
• Unpopulated header
• HAT EEPROM for identification
WGM110 WI-FI MODULE RADIO BOARD FEATURES
• WGM110A Wizard Gecko Wi-Fi Module
• Integrated chip antenna
• 802.11b/g/n compliant
• TX power: 16 dBm
• RX sensitivity: -98 dBm
• CPU core: 32-bit ARM® Cortex-M3
• Flash memory: 1 MB
• RAM: 128 kB
• Module certification: FCC, IC, Japan
and Korea
• CE compliant
Rev. 1.0
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Summary of Contents for Silicon Laboratories UG291
- Page 1 UG291: WGM110 Wi-Fi® Expansion Kit User's Guide The WGM110 Wi-Fi Expansion Kit is an excellent way to explore and evaluate the WGM110 Wi-Fi Module with an EFM32 MCU for WIRELESS EXPANSION BOARD FEATURES your embedded application. • EXP connector for interfacing Silicon...
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Page 2: Table Of Contents
Table of Contents 1. Introduction ....... . 3 1.1 Kit Contents . -
Page 3: Introduction
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Introduction 1. Introduction The WGM110 Wi-Fi Expansion Kit (OPN: SLEXP4320A) contains a Wireless Expansion Board (BRD8016A) and a WGM110 Wi-Fi Module Radio Board (BRD4320A) that plug directly into each other. The core of the kit is a WGM110 Wizard Gecko Wi-Fi Module which makes this kit an excellent starting point for adding Wi-Fi connectivity to a compatible Silicon Labs MCU Starter Kit. -
Page 4: Hardware Overview
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Hardware Overview 2. Hardware Overview 2.1 Hardware Layout The layout of the WGM110 Wi-Fi Expansion Kit is shown in the figure below. Wireless Expansion Board WGM110 Wi-Fi Expansion Kit WGM110 Wi-Fi Module Radio Board... -
Page 5: Wi-Fi Expansion Kit
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Wi-Fi Expansion Kit 3. Wi-Fi Expansion Kit The Wizard Gecko WGM110 is an all-inclusive Wi-Fi Module targeted for applications where good RF performance, low power con- sumption, and easy application development, together with fast time to market, are key requirements. WGM110 has excellent RF per- formance and can provide long range with robust wireless connectivity. -
Page 6: Board Identification
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Wi-Fi Expansion Kit 3.2 Board Identification The Starter Kit and Wireless EXP board provide identification of all the connected boards. This detection and identification is used by the Simplicity Studio tool to present the correct documentation and software examples. -
Page 7: Spi
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Wi-Fi Expansion Kit 3.3.2 SPI SPI is one of two host interfaces available on the Wireless Expansion Board. In order to use SPI as the connection between the WGM110 Wi-Fi Module and a host, the module must be reprogrammed. For more information about how to do this, see Section 3. -
Page 8: Stk Pin Mapping
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Wi-Fi Expansion Kit 3.3.3 STK Pin Mapping The pins connected to the WGM110 Wi-Fi Module will vary based on which Starter Kit is used in the configuration. The software run- ning on the MCU Starter Kit needs to take this into account. The table below shows the pin connections when using either the EFM32 Pearl Gecko PG1 STK or the EFM32 Pearl Gecko PG12 STK. -
Page 9: Wireless Exp Board
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Wireless EXP Board 4. Wireless EXP Board This chapter gives an overview of the Wireless Expansion Board connectivity and power connections. Mini-Simplicity Pass-through Expansion Header Connector Top Side (Not Mounted) Radio Board Connectors... -
Page 10: Pass-Through Expansion Header
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Wireless EXP Board 4.1.1 Pass-through Expansion Header The Wireless Expansion Board features a footprint for a secondary expansion header. The signals from the expansion header are di- rectly tied to the corresponding pins in the footprint, allowing daisy-chaining of additional expansion boards if a connector is soldered in. -
Page 11: Raspberry Pi Connector
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Wireless EXP Board 4.2 Raspberry Pi Connector On the bottom side of the Wireless Expansion Board, a dual row, female socket, 0.1" pitch connector can be soldered in to allow the WGM110 Wi-Fi Expansion Kit to act as a Raspberry Pi Hardware Attached on Top (HAT) board. -
Page 12: Raspberry Pi Connector Pinout
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Wireless EXP Board 4.2.1 Raspberry Pi Connector Pinout The table below shows the pin assignments of the Raspberry Pi connector, and the port pins and peripheral functions that are available on the WGM110 Wi-Fi Module. -
Page 13: Mini Simplicity Connector
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Wireless EXP Board Raspberry Pi Connector Expansion Header Mini Simplicity Con. Pin(s) WGM110 Pin Function Raspberry Pi Pin PC15 GPIO BCM 12 (PWM0) 33 (19) GPIO BCM 13 (PWM1) Ground Ground PC14 GPIO... -
Page 14: Mini Simplicity Connector Pinout
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Wireless EXP Board 4.3.1 Mini Simplicity Connector Pinout The pin assignment of the Mini Simplicity connector on the board is given in the table below. Table 4.3. Mini Simplicity Connector Pin Descriptions Pin Number WGM110 Connection... -
Page 15: Power Supply
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Wireless EXP Board 4.4 Power Supply There are three ways to provide power to the kit: • The kit can be connected to, and powered by, a Silicon Labs MCU STK • The kit can be connected to, and powered by, a Raspberry Pi •... - Page 16 UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Wireless EXP Board Host Host MCU Debugger (STK) Power Wireless Expansion Board Power Source STK Power Switch Power Switch Switch Raspberry Pi High power (LDO) Radio board is powered by LDO on the Wireless Expan- sion Board Note: It is important to only use the configurations provided in the table above in order to avoid any power conflicts.
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Page 17: Reconfiguring The Wi-Fi Module Firmware
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Reconfiguring the Wi-Fi Module Firmware 5. Reconfiguring the Wi-Fi Module Firmware The WGM110 Wi-Fi Module has several hardware interfaces that can be enabled, including the SPI slave interface, the USB device, and the micro-SD card. To configure the module's hardware interfaces, the module firmware needs to be recompiled and re-program- med. -
Page 18: Programming The Module Firmware
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Reconfiguring the Wi-Fi Module Firmware 5.2 Programming the Module Firmware The 10-pin Mini Simplicity connector on the Wireless EXP Board provides a Serial Wire Debug connection to the WGM110 Wi-Fi Mod- ule that can be used to upload the re-configured module firmware. Silicon Labs offers a... - Page 19 UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Reconfiguring the Wi-Fi Module Firmware Figure 5.2. Configuring the Debug Mode Remember to change the debug mode back to MCU after the module has been configured in order to continue application development on the host MCU.
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Page 20: Schematics, Assembly Drawings, And Bom
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Schematics, Assembly Drawings, and BOM 6. Schematics, Assembly Drawings, and BOM Schematics, assembly drawings, and bill of materials (BOM) are available through Simplicity Studio when the kit documentation pack- age has been installed. -
Page 21: Kit Revision History
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Kit Revision History 7. Kit Revision History The kit revision can be found printed on the kit packaging label, as outlined in the figure below. WGM110 WiFi Expansion Kit SLEXP4320A 17-06-26 124802042 Figure 7.1. Kit Label 7.1 SLEXP4320A Revision History... -
Page 22: Document Revision History
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide Document Revision History 8. Document Revision History Revision 1.0 2017-06-12 • Initial document revision. silabs.com | Building a more connected world. Rev. 1.0 | 22... - Page 23 Trademark Information Silicon Laboratories Inc.® , Silicon Laboratories®, Silicon Labs®, SiLabs® and the Silicon Labs logo®, Bluegiga®, Bluegiga Logo®, Clockbuilder®, CMEMS®, DSPLL®, EFM®, EFM32®, EFR, Ember®, Energy Micro, Energy Micro logo and combinations thereof, "the world’s most energy friendly microcontrollers", Ember®, EZLink®, EZRadio®, EZRadioPRO®, Gecko®, ISOmodem®, Micrium, Precision32®, ProSLIC®, Simplicity Studio®, SiPHY®, Telegesis, the Telegesis Logo®, USBXpress®, Zentri and others are trademarks or registered...
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