This product is discontinued and no longer available.

Suggested replacement: ESP32-WROOM-32E - Combo Wi-Fi/BT/BLE Module

WIFI300 - Low Power Wi-Fi Module

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Manufacturer: Grid Connect Inc.

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Product Information

Product Description

The WIFI300 module is a low power, fully self-contained, 802.11b/g/n Wi-Fi module. It is a perfect solution for developing a wide range of Wi-Fi applications. The module includes a U.FL connector for use with an external antenna or a built-in, on-board antenna. This FCC certified product is based off of the powerful, Marvell 88MW300, which enables data transfer through a wireless interface for any device with a Serial/SPI/GPIO interface.

NOTE: The WIFI300 has no firmware. Any software functions needed for a complete application can be developed with the use of the Marvell Software Development Kit (SDK) which contains some example projects. Contact Marvell to obtain this kit.

The WIFI300 is a suitable solution for any battery application requiring low power usage as it supports a wakeup-on-wireless feature. The voltage for the I/O can be adjusted to use either 1.8V, 2.5V, or 3.3V. The module can operate in Wi-Fi Direct mode or in AP+STA wireless networking mode. In addition to this, this low power module is able to provide both wireless and remote firmware upgrades, which is useful for meeting an assortment of application requirements.

With 8M bytes of Flash storage, the WIFI300 can be used with the special 88MW300 execute from Flash feature. This feature allows for support of the industry leading smart home standards including HomeKit, Weave, and others.

This module has been fully-optimized to fit a variety of applications. For example:

  • In-home automation
  • Handheld devices
  • Smart grid
  • Industrial controls
  • Personal medical applications
  • Internet of Things (IoT) devices
The WIFI300 module is well suited for applications requiring lower data rates and a need to transmit or receive data on an infrequent basis.

Utilizing the world’s lowest power embedded architecture, the WIFI300 is available in a SMT module package that is low-profile and only 23.1x32.8x2.7mm, making it extremely easy to mount on a PCB with application specific circuits.


  • 8M byte serial Flash
  • Wi-Fi @ 2.4 GHz with support for WEP security mode as well as WPA/WPA2/WPA2-Enterprise
  • Fully self-contained serial-to-wireless functionality
  • Ultra-Low-Power for Battery Applications with Low Power Mode
  • Built-in on-board antenna
  • U.FL connector for use with external antenna (antenna not included)
  • FCC & CE Certified

Supports the following:

  • Supports IEEE802.11b/g/n Wireless Standards
  • Supports UART/SPI/PWM/ADC/GPIO Data Communication Interface
  • Supports Work As STA/AP/AP+STA/Wi-Fi Direct Mode
  • Supports Smart Link Function (APP for smart configuration)
  • Supports Wireless (OTA) and Remote Firmware Upgrade Function
  • Supports Wakeup-on-Wireless and Local Wakeup
  • Supports TLS/SSL and mDNS Protocol
  • Supports 1.8V, 2.5V, 3.3V I/O voltages

Documents and Drivers


WIFI300 Module Datasheet

WIFI300 Module User Manual



  • Internal On-board PCB Antenna
  • External U.FL Connector


FCC, CE, ROHS 2, Wi-Fi Alliance


23.1mm × 32.8mm × 2.7mm


Local Wireless (OTA), Remote

Frequency Band



  • Data Interfaces: UART, SPI, PWM, GPIO, ADC, RTC
  • Wireless Standard: 802.11 b/g/n


8M bytes Flash






WEP / WPA-PSK / WPA2-PSK / WPA2-Enterprise / WEP64 / WEP128 / TKIP / AES

Temperature Range

  • Operation: -30ºC to 85ºC (-22ºF to 185ºF)
  • Storage: -45ºC to 125ºC (-49º to 257ºF)

Transmit Power

  • 802.11b: +16 +/-2dBm (@11Mbps)
  • 802.11g: +14 +/-2dBm (@54Mbps)
  • 802.11n: +13 +/-2dBm (@HT20, MCS7)
  • 802.11n: +12 +/-2dBm (@HT40, MCS7)


  • Operating: 3.3V~3.6V
  • I/O Voltage: 1.8V/2.5V/3.3V

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