There are a few posts on line from people failing to make it work through poor documentation, librarys & software but with some help from the vendor on eBay, I did make it work. Unfortunately, there are not many small, arduino friendly screens available! The one I eventually bought is called an H35B-IC. The answer is to use a Capacitive Touch Screen. If you've ever tried to use a Resistive screen with wet fingers, you'll know it doesn't work! The moisture in your fingerprint continues to register as a finger! The Pendant I linked above has another, more subtle problem. That applies to the MPG Wheel too - the X, Y & Z positions shown are from Mach4. That way, you know that if the button on the penant has changed state, Mach4 has acted on the instruction. Mach4 then sends the state of the thing that should have changed back to the pendant for display. The Pendant sends, for example, a button press, to Mach4. It sends & receives the Pendant data to a script running inside Mach4. It uses an Arduino Nano which the PC recognises as a Serial device. There are surprisingly few Pendants (CNC Machine, remote controls) for Mach4 and even fewer DIY projects. CNC Control Pendant for Mach4, connected through USB Serial
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