Data Sheet

ManualsBrandsParallax ManualsWiFiParallax WX ESP8266 WiFi Module - SIP

Web Site: www.parallax.com

Forums: forums.parallax.com

Sales: sales@parallax.com

Technical: support@parallax.com

Office: (916) 624-8333

Fax: (916) 624-8003

Sales: (888) 512-1024

Tech Support: (888) 997-8267

Parallax WX ESP8266 Wi-Fi Modules

DIP (#32420D), or SIP (#32420S)

The Parallax WX Wi-Fi module offers a new way to add Wi-Fi connectivity to your your

microcontroller projects. It can function as its own wireless access point (AP) or as a station

(STA) on another Wi-Fi network, or even both for brief periods of time when joining another

network. In either mode, it can serve its own configuration pages as well as user-created web

pages that make it possible for devices to interact with a microcontroller through the Wi-Fi

module. On Wi-Fi networks configured to allow it to access the Internet, it can also send and

receive a variety TCP/IP messages for Internet of Things (IoT) projects. This module also

serves its own firmware upgrade page that allows you to pick and upload the latest open source

firmware revision, or even variations that support specific applications as they become

available.

Features

● 32420S (right) - A breadboard-friendly, 5 and 3.3 V compatible 0.1 inch SIP package

that works well with the BASIC Stamp, Arduino and Propeller

● 32420D (left) - A 3.3 V, 2 mm DIP package designed to work with the socket on the

Propeller Activity Board, both original 32910 and WX #32912. NOTE: These modules

are not compatible with Parallax XBee adapter boards.

ESP8266 Wi-Fi Module (#32420)

v1.0 05/12/2016 Page 1 of 12

Summary of content (12 pages)

PAGE 1
Web Site: www.parallax.com Office: (916) 624-8333 Forums: forums.parallax.com Fax: (916) 624-8003 Sales: sales@parallax.com Sales: (888) 512-1024 Technical: support@parallax.com Tech Support: (888) 997-8267 Parallax WX ESP8266 Wi-Fi Modules DIP (#32420D), or SIP (#32420S) The Parallax WX Wi-Fi module offers a new way to add Wi-Fi connectivity to your your microcontroller projects.
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● ● ● ● ● ● ● ● ● ● ● 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.
PAGE 3
Program the Propeller Activity Board WX over Wi-Fi with the DIP module, and see its remote sensor data display on your computer in real time. This is especially useful when preparing for robot contests because your ActivityBot can roam in a maze and transmit sensor data to the SimpleIDE Terminal without the USB tether.
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Functional Description (1) ESP8266-WROOM-02 Wi-Fi Module The ESP-WROOM-02 is a low-power 32-bit MCU Wi-Fi module based on an ESP8266 chip, embedded with TCP/IP network stacks, integrated with 16 Mbits of SPI flash, and capable of operating in low power connectivity modes such as DTIM10 at 1.2mW. ESP-WROOM-02 is FCC, CE, KCC, TELEC, LCIE and IC certified with the best FCC results for IoT modules in the industry.
PAGE 5
(4) Reverse Polarity Protection When the module is powered by the optional SIP (Breadboard) header, a P-Channel mosfet provides reverse polarity protection and almost zero voltage drop at VIN. (5) Power LED The power LED remains on whilst correct polarity voltage is supplied to either the WX/XBee socket, or the SIP (Breadboard) connector. LED’s are visible from both sides of the board.
PAGE 6
Configuration Pages The Parallax WX Wi-Fi module comes pre-configured as a wireless access point (AP mode). To join its network, find the access point that starts with wx- followed by 6 alphanumeric characters. Later, if you have configured your Wi-Fi module to reside on another network, you can make it reappear as an access point by rapidly grounding and releasing the /PGM pin four times.
PAGE 7
The Configuration home page has 4 sub-pages (try Chrome if your browser doesn’t support all of the features listed) ● Networks: For setting the network mode and joining another network. ● Files: For uploading web pages and other files for interacting with microcontroller/electronic/robotic applications. The pages can be accessed later through a computer or portable device. ● Settings: For defining the the module’s name and serial communication settings for data exchange with the host microcontroller.
PAGE 8
The Files page makes it easy to upload custom web pages and other files that the wi-Fi module can serve. Just click the Choose File button, browse to the file you want to upload, and then double-click it. Tutorials for writing web pages that interact with your microcontroller through the Wi-Fi module are available, and example files are in a subfolder of the firmware zip file, both of which are available from the 32420S and 32420D product pages from w ww.parallax.com/. Copyright © Parallax Inc.
PAGE 9
Assuming the file you uploaded is named web-page.html, you’ll be able to access it at http://192.168.4.1/files/web-page.html in AP mode, or http://TheIpAddressYouNoted/files/web-page.html in STA mode. It’s fine to repeatedly change a file and re-upload it. The system will always serve the most recently uploaded version of a file if more than one version has been uploaded. There is almost 1 MB of file storage.
PAGE 10
The Parallax Wi-Fi module is designed to support over the air (OTA) firmware upgrades. So let’s say you purchased the Wi-Fi module, and some time later, the firmware gets upgraded by Parallax or its community to support more cool applications. If you want your Wi-Fi module to support those applications too, all you have to do is download the firmware from the Parallax web site, unzip it, and then use this page to choose the file (with a .ota extension) and load it into the Wi-Fi module.
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Pin Descriptions Module Pin Direction SIP Pin DIP Pin VIN Power input 1 1 /PGM Input 2 20 IO0 If held low during power up, ESP8266 boots into a mode ready for serial firmware load. Can also be pulled low rapidly, 4 times in a row to put Wi-Fi module into AP+STA mode. DBG Output 3 9 IO2 Transmits information about exchanges with the host microcontroller.
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PCB Dimensions Revision History Version 1.0: Original release Copyright © Parallax Inc. ESP8266 Wi-Fi Module (#32420) v1.