https://github.com/fivdi/onoff
Beaglebone how-to – Click a Breadboard button and change status on a web page using node.js
http://beaglebone.cameon.net/home/reading-the-analog-inputs-adc
PWM with BBB http://digital-drive.com/?p=155
BBB GPIO thru /dev/mem http://chiragnagpal.com/examples.html
[nodejs] SPI bit bang with node, process.binding and mmap bindings http://grokbase.com/t/gg/nodejs/137hgenmcr/spi-bit-bang-with-node-process-binding-and-mmap-bindings
BoneScript pin reference https://github.com/jadonk/bonescript/blob/master/src/bone.js
Device Tree Background: https://learn.adafruit.com/introduction-to-the-beaglebone-black-device-tree/device-tree-background
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