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Practical Arduino: Cool Projects for Open Source Hardware by Jonathan Oxer, Hugh Blemings

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Chapter 7. Online Thermometer

Arduino makes a great building block for data acquisition and logging systems, including sensors commonly used in home automation such as temperature sensors. By combining an Arduino and a few DS18B20 temperature sensors, you can install sensors around your home or office and access an up-to-the-moment report using a web browser.

Readings can also be logged and graphed over time, showing trends or measuring the effectiveness of your home heating or cooling systems. By placing sensors outside the house, inside your ceiling cavity, and inside every room, you can plot how well your home maintains its temperature when climate conditions change.

The information can also be used as part of the feedback loop for a control ...

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