Configure attribute polling on the server side

# 5 years ago
sriggi	Dear all, I have a simple question. In a python Tango device how can I configure polling for an attribute (period, turn on/off polling)? For standard attribute I can set the polling when creating them in the init_device: myattr= attribute(…, polling_period=3000, …) What should I do to set polling for State & Status attributes at initialization or if I want to reconfigure polling for some standard attributes after init_device()? Probably this question was answered in the past, so forgive me if I ask again. Many thanks, Simone ************************************************************** Simone Riggi INAF, Osservatorio Astrofisico di Catania Via S. Sofia 78 95123, Catania - Italy phone: +39 095 7332 extension 282 e-mail: simone.riggi@gmail.com, sriggi@oact.inaf.it skype: simone.riggi **************************************************************

# 5 years ago

Dear all,
I have a simple question. In a python Tango device how can I configure polling for an attribute (period, turn on/off polling)? For standard attribute I can set the polling when creating them in the init_device:

myattr= attribute(…, polling_period=3000, …)

What should I do to set polling for State & Status attributes at initialization or if I want to reconfigure polling for some standard attributes after init_device()?

Probably this question was answered in the past, so forgive me if I ask again.

Many thanks,

Simone

****************************************************************
Simone Riggi
INAF, Osservatorio Astrofisico di Catania
Via S. Sofia 78
95123, Catania - Italy
phone: +39 095 7332 extension 282
e-mail: simone.riggi@gmail.com,
sriggi@oact.inaf.it
skype: simone.riggi
****************************************************************

# 4 years ago
Snehal	Hi Simone, Have you got the solution to set polling for State & Status attributes at initialization in Python/PythonHL code? I am also trying to set polling for State & status command in PythonHL code. I am trying to resolve the issue posted on Tango Forum here: https://github.com/tango-controls/pogo/issues/53 Thanks. Regards, Snehal

# 4 years ago
sergi_rubio	Hi all, I have tested two options to solve that: First, setting polling for state is as easy as adding this line to init_device(self) method: `def init_device(self): Device.init_device(self) # PROTECTED REGION ID(TestHL.init_device) ENABLED START # >>>> self.poll_command('State',3000) # PROTECTED REGION END #` I will ask if it's possible to have this line added by Pogo for python classes. But, if you just want to have events for state; you can have them without polling adding these lines: `at init_device(): self.set_change_event('State',True) at each set_state() call: self.set_state(state) self.push_change_event('State')` I hope these recipes solve your question, Sergi Keep on dancing, http://www.tango-controls.org/resources/howto/how-fandango/ Edited 4 years ago

# 4 years ago

sergi_rubio

Hi all,

I have tested two options to solve that:

First, setting polling for state is as easy as adding this line to init_device(self) method:

    def init_device(self):
        Device.init_device(self)
        # PROTECTED REGION ID(TestHL.init_device) ENABLED START #
>>>>    self.poll_command('State',3000)
        # PROTECTED REGION END #

I will ask if it's possible to have this line added by Pogo for python classes.

But, if you just want to have events for state; you can have them without polling adding these lines:


    at init_device():

        self.set_change_event('State',True)

    at each set_state() call:

        self.set_state(state)
        self.push_change_event('State')

I hope these recipes solve your question,

Sergi

Keep on dancing,

http://www.tango-controls.org/resources/howto/how-fandango/

Edited 4 years ago

# 4 years ago
Anton	Thanks for investigating and the detailed answer, Sergi! Anton.