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802.11b/g Wireless LAN Module / Device Server

TCP/IP (BISM II Pin Compatible)

Part Number: WISMC01BI

1. General Description

The EZURiO 802.11b/g TCP/IP Wireless LAN Module is a fully integrated and qualified wireless device

server, designed to make it simple to embed 802.11 connectivity. Unlike other wireless modules all of

the necessary drivers, protocol stack, security algorithms and antenna are integrated. The module also

includes an interpreter that can run scripts, providing a complete wireless processing solution. It

enables you to add wireless internet connectivity to almost any device with a serial port. The module is

designed for lowest cost of integration and ownership. It is ideal for enabling M2M applications.

The module is a dual processor design, dedicating one processor to the 802.11b/g baseband with a

second powerful ARM7 processor, with 16MB of SRAM and 64MB of flash memory running the wireless

drivers, TCP/IP stack, web server and UWScript interpreter. Connection to the host device is via a high

speed 921,600 bps UART, with an additional twelve GPIO lines and two 10 bit ADCs. The interpreter

allows complex scripts to be run, allowing the WISM module to operate with zero host loading. It

means it is possible to use the module to wirelessly enable “dumb” sensors or UART ports.

The UWScripting wireless language developed by EZURiO is simple to use, but provides a rich

programming environment. Derived from BASIC, it allows powerful scripts to be written that combine

WLAN link management with TCP/IP socket control and machine interaction. A wide range of example

scripts are available which allow new applications to be rapidly developed. Scripts are downloaded into

the module via the UART and then either run under control from the host processor or autonomously at

power on.

The use of a scripting language allows the module to function in a wide variety of applications, from

simple cable replacement, to a more complex communications co-processor in which the module takes

over the management of the communications interface, or as a completely self-contained M2M solution

in which the module gathers information and reports it without host intervention.

An HTTP server is built into the module which allows user defined web pages to be served using

dynamic web page content supplied from a script. Information for the web page can be taken from the

UART stream, any of the GPIO or ADC pins, or variables within the script. The use of scripts allows

these to be pre-processed before being displayed on the web page. Similarly, information can be sent

to the script running on the module using HTTP POST commands. This allows flexible user interaction

with a module via a standard web browser. With the addition of an appropriate script it allows the

implementation of complete web enabled controllers and monitoring devices.

The twelve GPIO and two analogue input lines can be configured using scripts to provide control or

monitoring of simple devices such as switches or LEDs without requiring any external processing. Both

the GPIO and ADC lines can be accessed using scripts over either the wired host UART connection, or

remotely over the Wireless LAN connection.

The module includes a high sensitivity, high gain antenna which provides excellent range. Typical open

field performance yields an operating range of over 100 metres. A second 50 Ohm U.FL connection is

provided for an external antenna. This can be used in place of the internal antenna, or in conjunction

with the internal antenna to implement antenna diversity for improved receive performance.

Support is provided for low power modes that make the Wireless LAN module particularly applicable to

battery powered installations. It has been designed to ensure the best co-existence with other devices

operating within the same frequency spectrum and has hardware support designed into the module for

2 and 3-wire Bluetooth co-existence schemes. Direct connectivity to the EZURiO BISM Bluetooth

module is supported, as well as to other enabled Bluetooth devices.

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Summary of content (20 pages)

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802.11b/g Wireless LAN Module / Device Server TCP/IP (BISM II Pin Compatible) Part Number: WISMC01BI 1. General Description The EZURiO 802.11b/g TCP/IP Wireless LAN Module is a fully integrated and qualified wireless device server, designed to make it simple to embed 802.11 connectivity. Unlike other wireless modules all of the necessary drivers, protocol stack, security algorithms and antenna are integrated.
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The Wireless LAN module is supplied in a small pcb form factor (22.8mm x 33.8mm x 7.6mm), that connects to a main pcb using a 40 way Hirose connector which is pin compatible with the EZURiO Bluetooth Intelligent Serial Module BISMII. The module is Lead-free and RoHS compliant and supports an industrial operational temperature range of -40°C to +85°C. The module has FCC modular certification, Industry Canada certification and CE approval.
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2. Features Feature Implementation Wireless Specification Standards Supported IEEE 802.11b, IEEE 802.11g Frequency 2.412 – 2.484 GHz Channels 11 channels – USA 13 channels – Europe 4 channels – France (EIRP > 10mW outdoors) 14 channels – Japan Programmable selection of region Max Transmit Power 802.11b: +15 dBm @ antenna connector 802.11b: +17 dBmi from integrated antenna 802.11g: +13 dBm @ antenna connector 802.11g: +15 dBmi from integrated antenna Receive Sensitivity 802.
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Security Open Connection WEP encryption 64 and 128 bit options WPA-PSK* WPA2 Enterprise & Personal * IEEE 802.11i-PSK (AES-CCMP)* TKIP Encryption SSL2 / SSL3 / TLS1* Hardware Acceleration for security features Protocols Network Drivers 802.11b, 802.11g Internet IPv4, TCP, UDP, DHCP Client, DNS Client, ARP, HTTP Server Other protocols are supported via UWScript, e.g.
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Physical Dimensions 22.8mm x 33.8mm x 7.
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4. Mechanical 4.1 Wireless LAN Module Dimensional outline All dimensions in mm Notes 1 RF antenna 2 External Antenna connector (Hirose U.FL-R-SMT) 3 Board to board connector (Hirose connector) 4 2.0mm maximum top side component height (excluding antenna) 5 1.5mm maximum bottom side component height 6 3.8mm max. pcb clearance for fixings body (top and bottom) 7 40 way connector footprint 8 2.2 +/- 0.075 fixing holes x 3 DSH_WISMC01_1v2 WISM 40 pin TCP-IP Data Sheet.
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5. Electrical 5.1 40 way Hirose Pin Descriptions The Hirose DF12C board-to-board connector on the module is a 40-pin double-row receptacle. The table below defines the pin functions. The pin-out is as viewed from the underside of the Module. Pin No. Signal Description Pin No. Signal Description 1 ADC 0 3.0 V Max 2 GPIO1 I/O for Host. 3 ADC 1 3.
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5.2 Electrical Specifications 5.2.1 Absolute Maximum ratings Absolute maximum ratings for supply voltage and voltages on digital and analogue pins of the Module are listed below. Exceeding these values will cause permanent damage. Parameter Min Peak current of power supply Max Unit 550 mA Voltage at digital pins -0.3 3.3 V Voltage at VCC_5V pin 3.3 5 V 5.2.2 Recommended Operating Parameters 5.2.2.1 Power Supply Signal Name Pin No Voltage level VCC_5V 28, 29, 31 3.3V to 5.
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5.2.2.5 Signal Name Other Functions Pin No I/O RESET 13 I Active high. The RESET line has a fixed 10kOhm pull down resistor to ground, followed by a 10kOhm resistor feeding the base of a transistor. 3VOUT 27 O Used to monitor the state of the regulated supply within the module. THIS PIN MUST NOT BE USED TO POWER AN EXTERNAL CIRCUIT. 5.2.2.6 Comments Signal Levels for Bluetooth Coexistence and Wakeup Pins Signal Type Signal level Input VILmax=1.0V VIHmin=1.5V VIHmax=3.5V Output VOLmax=0.
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6. 6.1.1 RF Performance Transmit Power (802.11g) Conducted Transmit Power Typ: +13 dBm Antenna Gain (Integrated Antenna) +2dBi typ. Effective Transmit Power Typ:+15dBmi 6.1.2 Transmit Power (802.11b) Conducted Transmit Power Typ: +15 dBm Antenna Gain (Integrated Antenna) +2dBi typ. Effective Transmit Power Typ:+17dBmi 6.1.3 Receive Sensitivity (802.11b) Receive Sensitivity (11Mbps) Typ: -84dBm Antenna Gain (Integrated Antenna) +2dBi typ Effective Receive Sensitivity -86dBm 6.1.
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7. Functional Description The Wireless LAN module is a self-contained product and requires only power to implement full communication. The integrated, high performance antenna together with the RF and baseband circuitry provides the Wireless LAN connectivity and the UART interface for a connection to a host system. The complexity and flexibility of configuration are made simple for the design engineer by the integration of an extremely comprehensive scripting language - UWScript.
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The UART_DSR signal is an input to the module and is used to control the operation of the autorun script. When the signal is de-asserted, the autorun script (if present) will be executed at power on. If the UART_DSR signal is asserted then the autorun script is ignored. The operation, meaning and direction of the UART_RI and UART_DCD signals is user programmable under script control. Note that the serial module output is at 3.0V CMOS logic levels.
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8. Firmware Features 8.1 Command Set The Wireless LAN module has an integrated high level language called UWScript. UWScript provides both the command set and a structured programming language for the module. This language is described in detail in the UWScript Core Language and the UWScript Wireless LAN specific extension documents. Accompanying these are release notes specific to each module and firmware release, detailing the functions supported with each release. 8.
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LAN module is powered down, the same restrictions on script operation as powersave 5 apply. The average current consumption in this mode is reduced to <4mA. Powersave mode 1 requires beacons to be broadcast from an infrastructure access point. Therefore it is not available when operating in ad-hoc (IBSS) mode. 9. Application Information 9.1 Antenna Location The antenna used on the Wireless LAN module is designed to be largely immune from the effects of proximity detuning.
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The module should not be located in a sealed metal enclosure, as this will act as a Faraday cage and severely attenuate the radio signal. The antenna finish may tarnish as a result of environmental conditions and handling. This is a cosmetic effect and does not affect the RF performance. 9.2 External Antenna The approval of the module was performed using a 3dBi external antenna from RF Castle Electronics (www.rfcastle.com/pdf/RF-3dbi%20DipoleA.pdf).
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9.6 Board to board connector and stacking height The WISM connects to a motherboard by means of a board-to-board connector that is supplied by Hirose. Mating headers from Hirose are available in different stacking heights, allowing the spacing between the WISM module and carrier pcb to be changed from 3.5mm to 5.0mm. Item Part number Stacking height HRS number Receptacle on Module DF12C-40DS-0.5V(86) 3.5 mm – 5 mm CL537-0007-7-86 Headers DF12 series DF12(3.5)-40DP-0.5V(86) 3.
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9.8.1 Fixing Pillars EZURiO in conjunction with Richco has designed a mounting pillar for use with the Wireless LAN Module. This allows the module to be securely held to a primary pcb using snap fit details. A variety of heights are available to accommodate different variants of Hirose stacked connectors. Pillars supporting a 3.5mm stacked board height can be supplied by EZURiO. These and alternative spacings can also be ordered directly from Richco. Customer designs using these pillars should use 2.
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10. Qualification 10.1 Qualification Process The following safety precautions must be observed during all phases of the operation, usage, service or repair of any application incorporating this Module. Manufacturers of the RF equipment are advised to convey the following safety information to users and operating personnel and to incorporate these guidelines into all manuals supplied with the product.
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11. Related Documents AN008 - Wireless Development Kit User Guide AN013 – WISM – A complete wireless processor AN016 - Notification Requirements for Wireless Products WHP-050004-1V0 Bluetooth and 802.11 Coexistence UWTerminal User Guide UWScript Core Language Manual UWScript Wireless Extensions Manual UWScript Wireless LAN Web server Documents are available for download from www.ezurio.com 12.
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13. Interchangeable Bluetooth Module EZURiO’s range of Wireless LAN modules have been designed to be physically interchangeable with the BTM402 Bluetooth module and the BISM Bluetooth Serial Module. For product designers this means that they can design a single pcb, which can be populated with either an 802.11 or Bluetooth module, giving the opportunity to launch two different variants of wireless connectivity at minimal additional engineering effort.