Rainbow Electronics DAB-WLS-C01 (WiFi) - Manual

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.
DSH_WISMC01_1v2 WISM 40 pin TCP-IP Data Sheet.doc © 2007 EZURiO Ltd
Page 1