Just launched  Ben Delarre  's GPIO Server.

CAD & CAM Tool Chain ChiliPeppr
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Just launched @Ben_Delarre 's GPIO Server. It works a lot like the Serial Port JSON Server. Now toggle fans, LEDs, vacuums, coolant pumps, lasers, solder paste dispensers, air compressors, etc. all from within ChiliPeppr. This is another new first for any CNC controller. Thanks Ben.

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Ben’s server would go well with http://www.amazon.com/JBtek-Channel-Relay-Arduino-Raspberry/dp/B00KTELP3I/ref=sr_1_1?ie=UTF8&qid=1422907508&sr=8-1&keywords=raspberry+pi+relay+board&pebp=1422907512199&peasin=B00KTELP3I

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Is this only on the TinyG workspace? How do I get it onto the GRBL workspace?

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You’d have to talk to @Jarret_Luft as he’s the keeper of that workspace.