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Looking for Scriptable asynchronous communication tools (lemmy.radio)

submitted 6 months ago by [email protected] to c/[email protected]

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Anyone know of any scriptable asynchronous communication tools?

The closest so-far appears to be Kermit. It's been around since CP/M, but apparently there's still no centralised language reference and the syntax predates Perl.

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[–] [email protected] 1 points 6 months ago (1 children)

the end stop in external to the serial communication

Does this mean that you have some kind of other signals or pin-outs? If so, this is starting to sound like a great project for a Raspberry Pi, because the GPIO pin array can handle that.

[–] [email protected] 1 points 6 months ago (1 children)

Yeah, it's already on a pi, connected to my LAN and the USB port of the CNC. The switch is on a gpio pin.

I need to automate the calibration of the three axis. In other words, tell the CNC to move a specific distance, then figure out how far it actually moved, update the number of steps per mm, rinse and repeat.

To implement this, I have a known calibrated distance, a set of three 1-2-3 blocks, so I actually need to move until the switch closes, then ask the CNC how far it thinks it moved.

I intend to run this several times because right now, doing it manually is giving me weird results and I'm trying to figure out the root cause of the error.

So, I need to move an axis, interrupt the move if the switch is closed, and keep moving until the switch is closed.

[–] [email protected] 1 points 6 months ago (1 children)

Maybe then you need to move one stop up from scripting into something closer to actually programming. I'd be surprised if Python doesn't have the library support on a Pi for dealing with both serial and GPIO I/O.

[–] [email protected] 1 points 6 months ago (1 children)

Yeah, I was hoping to avoid that, but it's been heading that way for a few days now :}

[–] [email protected] 1 points 6 months ago

I looked and Python has the library support for the GPIO and to do background threading to poll pins. My preference would be to go with a JVM language like Kotlin, but then I'm a programmer. Python, from the little that I've mucked about with it is really just one step in complexity from scripting. Maybe even easier, because some things in shell scripts are super difficult to do.