Controlling a ShapeOko using a cup of Coffee creamed with Zappa goodness!

ShapeOko-Zappa.coffee

serialport = require "serialport"

port = "/dev/ttyACM0" # your ShapeOko's port here

oko = new serialport.SerialPort port, {
  baudrate: 9600,
  parser: serialport.parsers.readline "\n"
}

G = (g) ->
  oko.write g + "\n"
  return g

require('zappajs') ->
  @get '/a': -> G "G90"
  @get '/i': -> G "G91"
  @get '/G1/:feed/:axis/:distance': ->
    G "G1 F#{@params.feed} #{@params.axis} #{@params.distance}"

Change the port to the path of your Grbl or other G code consuming serial device and then make sure the serialport and zappajs packages are installed:

npm install serialport zappajs

The following request will send a G91 to switch to incremental positioning:

http://localhost:3000/i

Then go nuts sending G1s via requests like:

http://localhost:3000/G1/2500/X/50
http://localhost:3000/G1/250/Z/-5
http://localhost:3000/G1/5000/Y/-173.2

Obviously isn't robust in any way, shape or form—but, gives me a way to position my ShapeOko via teh interwebs.