Android controlled door opening Linux WiFi router

Android controlled door opening Linux WiFi router: "

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circuit_marked_up.jpgSunlight Labs, known for opening America's government, had a problem when they recently moved facilities. Creating new keys for team members was becoming costly, so they figured out an alternative method of providing secure access using a WRT54GL, easily sourced components, and a trusty copy of Make: Electronics. [Thanks, Nicko!]With the firmware installed, I was able to SSH into the router and perform some simple manipulations of the system's GPIOs -- General Purpose Input/Outputs. These connect to things like the system's LEDs and switches, and can be controlled in software. I selected a GPIO that didn't seem to be used by OpenWRT -- it illuminates the 'DMZ' LED on the front panel -- and wrote a very simple script to control it. I could now flip a tiny light on and off from a network connection. In the Maker Shed:

Makershedsmall Make: Electronics Our Price: $34.99 Want to learn the fundamentals of electronics in a fun and experiential way? Start working on some excellent projects as soon as you crack open this unique, hands-on book. Build the circuits first, then learn the theory behind them! With Make: Electronics, you'll learn all of the basic components and important principles through a series of 'learn by discovery' experiments. And you don't need to know a thing about electricity to get started.

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