Inventek Systems Announces Integrated WiFi Enabling Software for Embedded 802.11 eS-WiFi Applications

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Inventek Systems ( announces new firmware for their embedded eS-WiFi (embedded serial-to-WiFi) module family ( that supports the use of simple AT Commands for controlling WiFi connectivity. eS-WiFi modules offer an easy-to-use, plug-and-play WiFi solution that enables an embedded host processor to control the WiFi operation using simple AT Commands over a serial port.

eS-WiFi Production Ready Module

Inventek System’s eS-WiFi AT Command Set Software provides designers the ability to easily integrate WiFi connectivity into their embedded systems independent of the operating system and independent of the system complexity. Inventek’s eS-WiFi module family is based exclusively on Broadcom Corporation’s leading edge WiFi technology and components. All eS-WiFi products use these AT commands, have FCC certification, and offer the industries smallest footprint (15mmx30mm). These hardware and software enhancements that are integrated into all eS-WiFi modules help customers minimize development time and allow a quick production ramp-up.

The eS-WiFi AT Command software consists of a series of short text strings which combine together to produce complete instructions for communicating with the eS-WiFi module and instructing the module to connect to a network and send and receive data. Basic operational command examples include: “F0” (Find Networks), “C0” (Join Network), “T0” (Ping), “S0” (Send Data), “R0” (Receive data), “C4” (Set DHCP). A summary of the complete list of commands is available online at AT_CMD_Quick_Ref.pdf. These commands are sent to the eS-WiFi module over the UART input pin or through the SPI bus. The eS-WiFi module accepts these simple 2 digit commands, a Cortex M3 Microcomputer interprets them and through an SDIO bus communicates with Broadcom’s 802.11 MAC/Baseband/Radio chip. This simple AT Command Set programming feature makes the eS-WiFi module agnostic and therefore independent of the operating system and host processor allowing the use of a low cost microcomputer for input to the module.

The Inventek User’s Manual for the eS-WiFi module provides several program examples showing the AT Command code for the most popular WiFi functions including those listed below:

  •     Finding Available Networks
  •     Join Network Access Point
  •     Ping Host on Network
  •     TCP Server Setup and Data Transport
  •     TCP Client Setup and Data Transport
  •     UDP Server Setup and Data Transport
  •     UDP Client Setup and Data Transport

Inventek has created a You Tube video that further describes the eS-WiFi module hardware and the AT Command/Instruction Set.

In addition to this basic configuration whereby customers use their embedded host processor to send AT commands to the eS-WiFi module over the UART pin or through the SPI bus, Inventek offers additional flexibility for customers with either minimal program requirements or with higher power host processors. For applications with minimal program/processing requirements, Inventek offers the capability of integrating the customer’s host program onto a Cortex M3 microcomputer on-board the eS-WiFi module. System inputs are supplied to the module using any of the combined total of ten (10) GPIO and ADC input pins. For applications utilizing more powerful microcontrollers, the networking stack and services can reside on the customer’s host microcontroller and communication to the eS-WiFi module uses the SDIO interface.    For applications that require customized/turnkey design, Inventek also provides customer specific hardware and software design services. Please contact Inventek for specific details and recommendations for system partitioning using these more advanced options.

Main Hardware Features:

  •         802.11 b, g and n compliant based on Broadcom BCM4319.
  •         Fully contained TCP/IP stack minimizing host CPU requirements
  •         Configurable though AT commands.
  •         Host interfaces: UART and SPI .
  •         Network features - ICMP ( Ping), ARP, DHCP,TCP, UDP
  •         Low power operation (3.3V supply) with built-in low power modes.
  •         Secure Wi-Fi authentication WEP, WPA-PSK (TKIP), WPA2-PSK

Examples of the rapidly expanding embedded WiFi space include smart appliances, building automation, smart energy control, and cloud-based interconnectivity for healthcare and medical monitoring applications.
Design Examples:

  •         PDA, Pocket PC, computing devices
  •         Building automation and smart energy control.
  •         Industrial sensing and remote equipment monitoring.
  •         Warehousing, logistics and freight management
  •         PC and gaming peripherals
  •         Printers, scanners, alarm, audio and video systems
  •         Medical applications including remote diagnostics

About Inventek:
Inventek Systems is a privately held, USA-based, full-service wireless solutions provider focused on 802.11 WiFi embedded solutions, GPS embedded modules and antennas. A wide spectrum of standard and custom embedded products are offered ranging from low cost system-in-a-package (SIP) products to modular based custom solutions. Inventek provides a unique set of services from consulting to custom design to cost effective high volume manufacturing.
Inventek Systems products are used in a wide range of consumer, industrial, and defense based applications. Inventek’s eS-WiFi and Ez-GPS products are enabling customers around the world to add WiFi connectivity and GPS features at a quickening pace with minimal design effort.


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Dick Bates
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