Luc Bors Weblog

In the previous 3 posts, building towards the eProseed IoT Hackathon, I described how to setup your Raspberry Pi, and how to use the GrovePi sensors. The used example is a small weather-station that read temperature and humidity and shows the readings on a display. That is all very nice, however, the data remains local on the Raspberry Pi so there is nothing that we can do with this information from an 'enterprise' perspective. In this post I will explain how easy it is to send the data to whatever 'end point' by using a REST-JSON web-service. The Database Tables For this use case I decided I needed 2 tables. One to hold all my available sensors (yes, I know, I have only one) and one to store the measurements per sensor. The Webservice In order to store the data in the database tables I need to send it from the Raspberry Pi to the database. For that I use a simple REST/JSON webservice that has a POST method. I also implemented PUT, GET and DELETE methods, becaus...