EZURiO’s 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. It has been designed to be pin compatible with the footprint of Siemens MC55 GPRS modules, allowing designers to design one pcb to support either GPRS or Wireless LAN 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.
Ezurio’s WISMC04BI is a fully integrated wireless device server that provides 802.11b/g connectivity and a TCP/IP stack. It is pin‑compatible with Siemens MC55 GPRS modules, allowing a single PCB design for either GPRS or Wi‑Fi. The module includes a dual‑processor architecture: one processor for the 802.11 baseband and an ARM7 with 16 MB SRAM and 64 MB flash for drivers, web server, and the UWScript interpreter. Communication with a host is via a high‑speed UART (up to 921.6 kbps) and includes 12 GPIO lines and two 10‑bit ADCs.
The device supports IEEE 802.11b/g standards, WPA/WPA2 security, and an integrated HTTP server that can serve static or script‑generated web pages. It offers both an internal high‑gain antenna and a 50 Ω U.FL connector for an external antenna, with optional antenna diversity. The module is rated for industrial temperatures (‑40 °C to +85 °C), is RoHS‑compliant, and carries FCC, Industry Canada, and CE approvals.
| Frequency | 2.412 – 2.484 GHz |
|---|---|
| Max Transmit Power (802.11b) | +15 dBm @ antenna connector |
| Receive Sensitivity (802.11b) | -91 dBm @ 1 Mbps |
| Data Transfer Rate (UART) | Up to 921.6 kbps |
| UART Baud Rate | 9,600 – 921,600 bps |
| Supply Voltage | 3.3 V – 5.0 V DC |
| Operating Temperature | -40 °C to +85 °C |
| Dimensions | 35.0 mm × 32.6 mm × 7.6 mm |
| Weight | 10 g |
| Current Consumption (data transfer) | < 250 mA |
The module is rated for industrial temperatures from –40 °C to +85 °C.
It supports IEEE 802.11b and IEEE 802.11g.
It operates from a 3.3 V to 5.0 V DC supply.
The UART can transfer data up to 921.6 kbps.