Python script to stream G-Code

Roland · October 3, 2017, 7:03am

uArm Version: uArm swift pro
Operation System: Linux
uArm Controlling Method: Python 2.7

In Windows I use this python script, to stream G-Code to uArm:

grbl/grbl/blob/master/doc/script/simple_stream.py

#!/usr/bin/env python
"""\
Simple g-code streaming script for grbl

Provided as an illustration of the basic communication interface
for grbl. When grbl has finished parsing the g-code block, it will
return an 'ok' or 'error' response. When the planner buffer is full,
grbl will not send a response until the planner buffer clears space.

G02/03 arcs are special exceptions, where they inject short line 
segments directly into the planner. So there may not be a response 
from grbl for the duration of the arc.

---------------------
The MIT License (MIT)

Copyright (c) 2012 Sungeun K. Jeon

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal

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UArm is connected via usb to my laptop. After adjusting the serial port to the right COM-Port, everything works.

Now I want a siemens iot2040 (its an intel galileo board with yocto linux) to send the G-Code. I connected the uArm to the board via usb. I installed python and pyserial, as in windows. But I can’t talk to the uarm with my streaming script. In my script I tried all possible serial ports (ttyGS0, ttyS0, ttyS1, ttyS2, ttyS3). Maybe the connection via usb is the mistake.

For serial communication the board has

2 x D-sub sockets (RS 232 , RS 422, RS 485 )
1 x micro-USB,
Pins 0 and 1

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Roland · October 3, 2017, 1:29pm

I found out that the yocto linux on the iot2040 has no usb-serial support. So it’s a driver problem, I think.
Are there other possibilities to connect the uArm with the board, maybe with some pins of the 30P base extension.

FeKo · October 3, 2017, 2:47pm

There is a TTL serial on the 30p connector, pin 3 and 4
Over USB you can switch over with the command M2500, this is then permanent until the next reset of the uArm.
More details in Chapter 3 of the deveopers guide.

hope it works for you.
Regards
Felix

Roland · October 3, 2017, 3:06pm

Where can I download the developers guide?

FeKo · October 3, 2017, 3:47pm

Support-> Download on uFactory website, scroll down to “Documents”
direct link http://download.ufactory.cc/docs/en/uArm-Swift-Pro-Develper-Guide-170911.pdf