Diff: app.py

Revision:

0:4233b7b10255

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app.py	Fri Feb 10 08:36:15 2017 +0000
@@ -0,0 +1,120 @@
+import mbed_connector_api 				# mbed Device Connector library
+import pybars 							# use to fill in handlebar templates
+from   flask 			import Flask	# framework for hosting webpages
+from   flask_socketio 	import SocketIO, emit,send,join_room, leave_room  
+from   base64 			import standard_b64decode as b64decode
+import os
+
+app = Flask(__name__)
+socketio = SocketIO(app,async_mode='threading')
+
+if 'ACCESS_KEY' in os.environ.keys():
+	token = os.environ['ACCESS_KEY'] # get access key from environment variable
+else:
+	token = "ChangeMe" # replace with your API token
+
+connector = mbed_connector_api.connector(token)
+
+@app.route('/')
+def index():
+	# get list of endpoints, for each endpoint get the pattern (/3201/0/5853) value
+	epList = connector.getEndpoints().result
+	for index in range(len(epList)):
+		print "Endpoint Found: ",epList[index]['name']
+		e = connector.getResourceValue(epList[index]['name'],"/3201/0/5853")
+		while not e.isDone():
+			None
+		epList[index]['blinkPattern'] = e.result
+	print "Endpoint List :",epList
+	# fill out html using handlebar template
+	handlebarJSON = {'endpoints':epList}
+	comp = pybars.Compiler()
+	source = unicode(open("./views/index.hbs",'r').read())
+	template = comp.compile(source)
+	return "".join(template(handlebarJSON))
+
+@socketio.on('connect')
+def connect():
+	print('connect ')
+	join_room('room')
+
+@socketio.on('disconnect')
+def disconnect():
+	print('Disconnect')
+	leave_room('room')
+
+@socketio.on('subscribe_to_presses')
+def subscribeToPresses(data):
+	# Subscribe to all changes of resource /3200/0/5501 (button presses)
+	print('subscribe_to_presses: ',data)
+	e = connector.putResourceSubscription(data['endpointName'],'/3200/0/5501')
+	while not e.isDone():
+		None
+	if e.error:
+		print("Error: ",e.error.errType, e.error.error, e.raw_data)
+	else:
+		print("Subscribed Successfully!")
+		emit('subscribed-to-presses')
+
+@socketio.on('unsubscribe_to_presses')
+def unsubscribeToPresses(data):
+	print('unsubscribe_to_presses: ',data)
+	e = connector.deleteResourceSubscription(data['endpointName'],'/3200/0/5501')
+	while not e.isDone():
+		None
+	if e.error:
+		print("Error: ",e.error.errType, e.error.error, e.raw_data)
+	else:
+		print("Unsubscribed Successfully!")
+	emit('unsubscribed-to-presses',{"endpointName":data['endpointName'],"value":'True'})
+    
+@socketio.on('get_presses')
+def getPresses(data):
+	# Read data from GET resource /3200/0/5501 (num button presses)
+	print("get_presses ",data)
+	e = connector.getResourceValue(data['endpointName'],'/3200/0/5501')
+	while not e.isDone():
+		None
+	if e.error:
+		print("Error: ",e.error.errType, e.error.error, e.raw_data)
+	else:
+		data_to_emit = {"endpointName":data['endpointName'],"value":e.result}
+		print data_to_emit
+		emit('presses', data_to_emit)
+    
+@socketio.on('update_blink_pattern')
+def updateBlinkPattern(data):
+	# Set data on PUT resource /3201/0/5853 (pattern of LED blink)
+    print('update_blink_pattern ',data)
+    e = connector.putResourceValue(data['endpointName'],'/3201/0/5853',data['blinkPattern'])
+    while not e.isDone():
+    	None
+    if e.error:
+	    print("Error: ",e.error.errType, e.error.error, e.raw_data)
+    	
+
+@socketio.on('blink')
+def blink(data):
+	# POST to resource /3201/0/5850 (start blinking LED)
+    print('blink: ',data)
+    e = connector.postResource(data['endpointName'],'/3201/0/5850')
+    while not e.isDone():
+    	None
+    if e.error:
+    	print("Error: ",e.error.errType, e.error.error, e.raw_data)
+
+# 'notifications' are routed here, handle subscriptions and update webpage
+def notificationHandler(data):
+	global socketio
+	print "\r\nNotification Data Received : %s" %data['notifications']
+	notifications = data['notifications']
+	for thing in notifications:
+		stuff = {"endpointName":thing["ep"],"value":b64decode(thing["payload"])}
+		print "Emitting :",stuff
+		socketio.emit('presses',stuff)
+
+if __name__ == "__main__":
+	connector.deleteAllSubscriptions()							# remove all subscriptions, start fresh
+	connector.startLongPolling()								# start long polling connector.mbed.com
+	connector.setHandler('notifications', notificationHandler) 	# send 'notifications' to the notificationHandler FN
+	socketio.run(app,host='0.0.0.0', port=8080)
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