I have 2 of the headline boards, Protooner Ver 3.00, in operation. Now I would like to connect a pause signal from a temperature monitouring second UNO. My idea is to run my CNC sketches, watching the temperature of the spindle motor of the mill. At too high temperature my sketches will raise Z-axis, the tool out of the work piece and cut off the spindle motor power until it has cooled down some 20 - 30 degrees Celcius. Then the spindle motor power will be turned on, Z-axis returned to its working positiond and the CNC sketch will continue.
On the board SCL and SDA, 2 of the analog pins, 4 and 5, or 0 and 1, exist. Where can I find the other 4 analog inputs, except from soldering directly where the pins to the UNO are soldered?
There are digital I/O being free but they have special meanings for Estlcam using Grbl version 0.9 - 1.1 that I use occasionally. I would like to find a free input for my pause signal that hopefully doesn't jam up Estlcam.
Anybody knowing that board?