▸ 2x Stepper Motor (X & Y Axis) ▸ 4x Limit Switch ▸ 1x Servo Motor (Pen Up & Down) ▸ 315 x 380 mm (12.5 x 15 in) Drawing Area ▸ Use any pen or other drawing utensil ▸ $299, available on Amazon 2016-01-14
C ▸ Very rudimentary GCode support ▸ G28 = Home, G1 = Move ▸ M1 = Set Pen Position ▸ Very rudimentary motion planning ▸ But it’s Open Source, so we can hack it 2016-01-14
serial port (I used pyserial) ▸ Send ASCII GCode commands, wait for “OK” response ▸ If you can generate a sequence of 2D points, you can draw it! 2016-01-14