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OpenWSN is a powerful WSN stack, featuring advanced low-level synchronization and communication algorithms, as well as higher-level IPv6 functionality, which permit you to send your data straight to the internet. The availability of all of these features can make it overwhelming for new users to start developing applications. Most simple WSN applications do not require you to fully understand all the low-level features. Sometimes, users just want to transmit data from sensors or ping motes in the field. This tutorial will show you how easy it is to design such a simple application.
In this tutorial we will design a simple OpenWSN example application called “rex“cexample.” The application runs on top of OpenWSN and samples the Analog to Digital Converter (ADC) on your microcontroller. The ADC can be connected to a sensor of your choice. In this case we will be collecting temperature readings every 5 seconds and transmitting them to a central server. If you want to connect your own analog sensor, you can copy this example verbatim. If you want to use a digital sensor (I2C, SPI, etc.) you should be able to modify this application easily with some basic programming knowledge. We will begin by giving you a basic introduction to how this example application fits within the OpenWSN stack, after which we will go into specific steps necessary to port it to your project.
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For our application, we need to create the corresponding cexample.c and .h files, and place them into the OpenWSN/Apps directory openapps directory (see figure). In this example our application is composed of the rexcexample.c and rexcexample.h files. These files will hold our basic application code.
Register your application with the OpenWSN stack
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