Creating a Harmony v2 TCP/IP Project

Description

In this video demonstration, you will use the MPLAB® Harmony TCP/IP and the USB middleware libraries to create a simple HTTPS client application which communicates with the Yahoo! Weather Service in order to retrieve and display the temperature of a specific location on earth. The retrieved weather data (temperature) is sent to the PC via a USB CDC-class connection (emulating RS-232) and displayed in a terminal emulator such as CoolTerm.

The application is developed from scratch using the MPLAB Harmony Configurator (MHC) plug-in within MPLAB X IDE.

connection-overview.png
​

The Yahoo! Weather Service API

This service provides an RSS feed containing the current weather conditions for a specific region or city. To use the API, you will need to obtain the Where On Earth Identifier (WOEID) for the specific region/city of interest. This site provides the WOEID codes for all regions.

For more details on how to use the API, please visit the Yahoo! Weather API Documentation page.

dm320004.png

The hardware for this project uses the PIC32 Ethernet Starter Kit which contains a PIC32MX795F512L microcontroller, incorporating the USB Host and Device interfaces as well as a 10/100 Ethernet interface. The board features a built-in programmer/debugger, enabling a direct connection to MPLAB X IDE.

dm320004-side-view.gif

Instructions

The video below guides you through all the steps required to create and run this demonstration. You will need to download the application files as well as the required software tools and MPLAB Harmony framework if you wish to follow along.

  1. Download the relevant application files from the list given below. Unzip to your C:\ drive (you should see C:\YAHOO_WEATHER).
  2. Download MPLAB X IDE, MPLAB XC32, and MPLAB Harmony from the download section given below.
  3. Download the CoolTerm Terminal Emulator software.
  4. Watch the video and when prompted, copy the application files into the harmony project folder.

Download Application Files

The ZIP file includes the four application files you will need to build the demonstration: app.c, app.h, App_Yahoo.c, and certs.h.

Download and unzip to your C:\ drive. You should see a new folder C:\YAHOO_WEATHER containing these files.

‍
.zip

  Windows
  Linux
  Mac OSX

Download MPLAB Software

+ Click to show software tools and MPLAB Harmony download

Download CoolTerm Terminal Emulator Software

CoolTerm is a cross-platform terminal emulator that runs on Apple OS X®, Microsoft Windows®, and Linux®. It is available for download here.

Video

The video demonstration below is presented by Luc Archambault, Principal Field Applications Engineer, Microchip Technology Inc:

  Return to Top

© 2020 Microchip Technology, Inc.
Notice: ARM and Cortex are the registered trademarks of ARM Limited in the EU and other countries.
Information contained on this site regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.