Need example usage of GetState (websocket)

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I am trying to do a similar thing in python for rotary encoders.

When I press the button of one I want it to pause/play depending on the current state.

From this page (gist.github.com/ivesdebruycker/ … c1d28e9b9e) I got some idea of what is going on and borrowed this snippet.

[code]def on_push_state(*args):
# print(‘state’, args)
global status
status = args[0][‘status’].encode(‘ascii’, ‘ignore’)
print status

socketIO.on(‘pushState’, on_push_state)

get initial state

socketIO.emit(‘getState’, ‘’, on_push_state)[/code]

my problem appears to be the status is not being updated.

I have kludged together bits form all over the place and it is looking a little messy, but I will attach what I have right now, as embarrassing as it will be.

In full:

#!/usr/bin/env python
#
# Raspberry Pi Rotary Test Encoder Class
#
# Author : Bob Rathbone
# Site   : http://www.bobrathbone.com
#
# This class uses a standard rotary encoder with push switch
#
import subprocess
import sys
import time
from rotary_class import RotaryEncoder
from socketIO_client import SocketIO, LoggingNamespace

# Define the IO elements
socketIO = SocketIO('localhost', 3000)
status = 'unknown'


# Switch definitions
LEFT_A = 17
LEFT_B = 27
LEFT_BUTTON = 10
RIGHT_A = 23
RIGHT_B = 24 
RIGHT_BUTTON = 25

# This is the event callback routine to handle left knob events
def left_knob_event(event):
	handle_event(event,"Left")	
	return

# This is the event callback routine to handle right knob events
def right_knob_event(event):
	handle_event(event,"Right")	
	return
	
def on_push_state(*args):
		# print('state', args)
		global status
		status = args[0]['status'].encode('ascii', 'ignore')
		print status

socketIO.on('pushState', on_push_state)

# get initial state
socketIO.emit('getState', '', on_push_state)


# This is the event callback routine to handle events
def handle_event(event, name):
	if event == RotaryEncoder.CLOCKWISE:
		if name == "Right":
			socketIO.emit('volume', '+');
		else :
			socketIO.emit('seek',5);
		print name, "Clockwise event =", RotaryEncoder.CLOCKWISE
	elif event == RotaryEncoder.ANTICLOCKWISE:
		if name == "Right":
			socketIO.emit('volume', '-');
		else:
			socketIO.emit('seek',-5);
		print name, "Anticlockwise event =", RotaryEncoder.BUTTONDOWN
	elif event == RotaryEncoder.BUTTONDOWN:
		if name == "Right":
			print status
			if status == 'play':
				socketIO.emit('pause');
			else:
				socketIO.emit('play');
		else:
			socketIO.emit('next');
		print name, "Button down event =", RotaryEncoder.BUTTONDOWN
	#elif event == RotaryEncoder.BUTTONUP:
	#	print name, "Button up event =", RotaryEncoder.BUTTONUP
	return

# Define the left and right knobs
leftknob = RotaryEncoder(LEFT_A,LEFT_B,LEFT_BUTTON,left_knob_event)
rightknob = RotaryEncoder(RIGHT_A,RIGHT_B,RIGHT_BUTTON,right_knob_event)

# Wait for events
while True:
	time.sleep(0.5)

# End of program

Additional:

running this from cmdline returns a result.

curl volumio.local:3000/api/v1/getState

Whereas in py the getstate appears to be returning “None” when I tried this

print socketIO.emit(‘getState’)
None

I am wondering if I shouldn’t be using socketIO.emit, but something else.

Another Update:

This time I tried adding this [code]
socketIO.on(‘pushState’, on_push_state)

get initial state

socketIO.emit(‘getState’, ‘’, on_push_state)

try:
socketIO.wait(0.1)
except KeyboardInterrupt:
pass
[/code]

Result in:
print status
pause

I can wait 0.1 seconds.

More testing to follow…