Jason, thank you for the important addition...
On 17 апр, 13:07, Jason Brower <encomp...@gmail.com> wrote: > To add to the closed topic. (: > Massimo and I worked over this with PySerial and yeah, having a separate > program to manage the serial connection is actually VITAL. Especially > if your making devices that send important other data. Have that > external app just update a file in queue with information, and when you > need it displayed in the webbrowser you can just make a request for the > status from that file. > This is similar to the issues found in a webcam. You don't make the web > application take a picture of a file when a webpage requests it as it > would pile full of requests and errors as everyone is trying to use the > same device. With a file, like an image, everyone should have access to > it very easily. > In my setup I was dealing with industrial robots, some logic had to be > done faster than the webbrowser could do it. So having a "machine > server" as we call it at work, helps take care of those common logic > steps so that web2py doesn't worry about it. > BR, > Jason Brower > > > > On Sat, 2010-04-17 at 01:46 -0700, aabelyakov wrote: > > Yes, this is the right decision! > > Topic closed. > > Thanks > > > On 16 апр, 17:30, mdipierro <mdipie...@cs.depaul.edu> wrote: > > > I think there is a problem with multithreading because of PySerial. > > > Pyserial open a post connected to COM and COM is a resource that > > > cannot be shared. In web2py every request is executed in its own > > > thread so it is not obvious who open the COM, who closes it and how > > > conflicts are avoided. > > > > Please tell us more of what you are doing. The best solution may be > > > not to use pyserial in a web2py problem but use it in a single > > > bachground process that talks to web2py via queued messages. > > > > Massimo > > > > On Apr 16, 2:13 am, aabelyakov <aabelya...@gmail.com> wrote: > > > > > I do not use os.chdir or explicit calls to thread module. > > > > I'm using PySerial and after the error COM port remains open. > > > > To close it, I restart the web server. > > > > How to avoid this? > > > > > On 15 ÁÐÒ, 22:46, mdipierro <mdipie...@cs.depaul.edu> wrote: > > > > > > Do you use os.chdir or explicit calls to the thread module in your > > > > > code? > > > > > > On Apr 15, 12:15špm, aabelyakov <aabelya...@gmail.com> wrote: > > > > > > > During my application error occurs and it stops giving error ticket. > > > > > > > How can I in my application to return the resources of the operating > > > > > > system > > > > > > (eg close the COM port) šbefore the error ticket not to restart the > > > > > > web server? > > > > > > > Excuse my bad English... > > > > > > > Regards- óËÒÙÔØ ÃÉÔÉÒÕÅÍÙÊ ÔÅËÓÔ - > > > > > > - ðÏËÁÚÁÔØ ÃÉÔÉÒÕÅÍÙÊ ÔÅËÓÔ - > > > > > -- > > > > Subscription > > > > settings:http://groups.google.com/group/web2py/subscribe?hl=en-Скрыть > > > > цитируемый текст - > > > > - Показать цитируемый текст -- Скрыть цитируемый текст - > > - Показать цитируемый текст -
