How to set humidity sensors in the "cloud"?
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The technology is closer to water resources. It is now possible to measure physical parameters of the water cycle, put them in the "cloud" and access in real time. We talk about open source technologies.
This article shows the implementation of soil moisture sensors for periodic data collection, storage and online data representation on the web.
Tools
This project used open source software and open source hardware such as:
Soil moisture sensor: It measures the volumetric water content in the soil through its electrical resistance.
Arduino UNO: Microcontroller for the construction of digital gadgets and interactive objects. It was used to take soil hygrometer data and send the digital data to the Raspberry Pi.
Raspberry Pi: Programmable computer with digital ports, WiFi and USB connection. It was used to receive data from the Arduino board and send them to the cloud.
Python: Programming language used in the Raspberry Pi to connect to the Arduino and send the data to the cloud through ThingSpeak
Thinkspeak.com: Online platform for the "Internet of Things". It allows free online data storage to a certain amount. There are other platforms as nimbits.com free initial access, plot.ly, zettajs.org, among others.
About prices
This is a very interesting topic when we use open source hardware. The prices of these devices are very low compared to those distributed by commercial firms.
From Ebay prices with free shipping to anywhere in the world, these devices cost in USD Dollars:
Raspberry Pi 2: $ 38
Arduino UNO: $ 3.5
Humidity Sensor: $ 1.0
With power supply connector wifi, among other memories online price is $ 70 sensor capable of measuring up to 6 points of moisture.
Code
You can access the code in our GitHub repository:
https://github.com/SaulMontoya/How-to-set-humidity-sensors-in-the-cloud