In the IT world, monitoring the environmental conditions of your data center is something that’s commonly overlooked. There has never been a cheap and easy solution, and it’s easy for the task to fall pretty far down the ‘needs to be done’ list. After being quoted $13,000 for a system to monitor temperature and humidity in one of our data centers, I decided to revive an old project of mine, and build a better system for under $150.

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