Add twisted support for asynchronous programming

[GoogleCodeExporter]

Hi, I know it's difficult to implement(maybe out of scope) but I think a 
twisted transport will be wonderful to have.

Can I fork this to implement an XBEE twisted transport?

Original issue reported on code.google.com by wsart...@gmail.com on 23 Jun 2011 at 9:04

[GoogleCodeExporter]

Hi. Any luck with that?

I'll take this opportunity to introduce something I'm working on: 
http://code.google.com/p/open-zb-home/
(before I try make it more public..)

Please feel free to check it out and let me know what you think.

I've got a little work-around that I'm suing in the meantime:

{{{

def getFromXBeeThread():
        while True:
                response = xbee.wait_read_frame()
                if response ["id"]=="rx":
                        print response["rf_data"],
                        threads.deferToThread(getFromXBeeThread).addCallback(dispatchTCP)
                        return response["rf_data"]
}}}

you just have to call it once to start it, then it will loop itself.

Original comment by ruZ...@gmail.com on 12 Aug 2011 at 11:02

[GoogleCodeExporter]

I have done this twisted protocol:
http://pastebin.com/fUcuexHW

An implementation example:
http://pastebin.com/pLdVV4gn

Original comment by wsart...@gmail.com on 12 Aug 2011 at 7:23

[GoogleCodeExporter]

Hi all,

Sorry for responding so late; it slipped my mind a while back.

I'm not sure I quite understand what you asking, wsartori. Do you want to make 
a whole new XBee library for Twisted? 

Now, I don't know much about Twisted and how it does things; would it be 
possible to get the functionality you want by making a package within the 
helpers package of python-xbee? If all you need is to wrap an XBee instance 
such that Twisted can access it, then checking it in here would ensure that you 
get the latest fixes/updates/etc. without regularly pulling from upstream.

What do you think?

Thanks,
~Paul Malmsten

Original comment by pmalms...@gmail.com on 13 Aug 2011 at 8:44

• Changed state: Accepted
• Added labels: Type-Enhancement
• Removed labels: Type-Defect

[GoogleCodeExporter]

Thanks wsartori. I've implemented your snippets and it's working well. I was 
using the defereToThread before but it was blocking the shutdown.. 
daemonizing..etc.. you solved it:)

Paul, Twisted is a "network-engine", it's a bunch of tools that simplify doing 
loads of things like creating web servers, tcp servers, clients, etc. It's 
completely asynchronous and non-blocking and works best when the rest of the 
code is too.

Your library has asynchronous calls in it that also defer but I didnt get 
around to trying it out.  

This is only relevant to receiving since sending is asynchronous anyway...

Original comment by ruZ...@gmail.com on 14 Aug 2011 at 1:28

[GoogleCodeExporter]

I decided to make it a separated project to don't add a dependency to twisted 
on python-xbee.

I made the package and it's available on pypi:
http://pypi.python.org/pypi/txXBee/

source: https://github.com/trunet/txXBee

you can close this issue.

Original comment by wsart...@gmail.com on 3 Oct 2011 at 1:37