Data Sheet

● Supports 2.4 GHz Wi-Fi access through the ESP8266-WROOM-02 module (FCC and

CE approved)

● Transparent serial communication mode for wireless microcontroller programming and

debugging (Activity Board WX)

● Command serial communication mode for exchanging information with the host

microcontroller

● 3 Wi-Fi modes: (AP) as access point that up to four devices can join, (STA) as a station

on another Wi-Fi network, and (STA + AP) station plus access point for joining another

Wi-Fi network.

● Micro web server allows other devices to access both configuration and user

created/uploaded web pages in STA or AP mode.

● Approximately 1 MB of user file system for storing web pages and other content.

● Built-in configuration web pages for settings, networks, file uploads and over the air

firmware updates.

● Over the air (OTA) web page uploads via a simple web interface. Upload one or more

pages to the module’s user file system. The Wi-Fi module will serve those pages to

computers and mobile devices that have joined its network (AP) or on the same network

with it (STA). This will allow your microcontroller projects to interact with computers,

tablets, cell phones, and other devices on the network.

● OTA firmware upgrades, also through a simple web interface. With this, your Wi-Fi

module can always be ready for latest features and projects contributed by Parallax and

the open source community.

● Supports HTTP (server), WebSocket (server), and TCP (client) connections.

HTTP/WebSocket allows your Wi-Fi module to exchange data with other devices on the

network through user-created web pages it serves. TCP enables connection to other

devices for low-level communication, for example to build your own HTTP request to a

page on the worldwide web.

● Power, Associate, Data In and Data Out LEDs visible from both sides of the pcb

Application Ideas

Set up your own pages for controlling and

monitoring your robot or sensor projects. The

module hosts and serves the pages over Wi-Fi

and then acts as a simple serial intermediary

between your microcontroller and HTTP or

WebSocket clients accessing pages. Picture a

Boe-Bot Robot reporting its Ping))) distance

measurements and receiving control commands

from a web page on a cell phone.’

ESP8266 Wi-Fi Module (#32420)

v1.0 05/12/2016 Page 2 of 12