Connection - Direct control

[thh123]

Hi all,

I've been using the Pybaoard for a little while, been pushing my main.py files over to the Pyboard, works a treat or manually screening onto the Pyboard and running commands etc.

I want to control the PyBoard from my host PC with an automated Python script.
e.g. toggle a GPIO, read a GPIO value and integrate a I2C device.

Can someone point me in the right direction of opening REPL within a python script on my host PC, so I can control the pyboard with an external script - OR tell me a nicer way to do this.

[jimmo]

Hi,

The pyboard.py tool (which is one of many tools that you can use to copy files to the device or run code without copying) can also be used as a library. I recently wrote some (very basic) docs for this:

http://docs.micropython.org/en/latest/r ... rd-library

Note: you may run into some issues with the way pyboard.py does a soft-reset before doing anything. Which may or may be what you want. In either case you can probably hack away at pyboard.py to make it do exactly what you need.

[thh123]

Hi,

Thanks for the speedy reply.
This looks interesting…
For sure the soft restarting may be an issue.
I was hoping for a more “live” way to control the PyBoard.
e.g. when you enter the native python environment and you can feely type into the console.

I'll have a look into the tool though seems like it is 90% what I need.

[jimmo]

Sorry I'm not sure I quite understand what you mean. But yeah, take a look at pyboard.py (both as a standalone tool but also as a library that you can use from your existing program), and see how you go. Happy to answer any questions about it.

[thh123]

Sadly I keep getting a failure to access ttyACM0 Errno16, I am running this on a VM.

Using the console I can connect to the PyB but through any for of script. hummm

[jimmo]

What do you mean by "Using the console" ?

Can you share the commands you're using for both?

[thh123]

console/command line/terminator, whatever you like to call it...

I played with the chmod settings of ttyACM0 which seems to have resolve this now

Running the following works well now...
python pyboard.py --device /dev/ttyACM0 -c 'print(1+1)'

You mentioned the soft reset, however when running the command above I don't think the PYB does a soft reset?

Thanks for your initial response, It seems to work well now my environment is setup.