def subscribe_shadow_delta(self):
logging.info("Subscribing to Delta events...")
delta_subscribed_future, _ = self.shadow_client.subscribe_to_shadow_delta_updated_events(
request=iotshadow.ShadowDeltaUpdatedSubscriptionRequest(
thing_name=self.thing_name),
qos=mqtt.QoS.AT_LEAST_ONCE,
callback=self.on_shadow_delta_updated)
#delta_subscribed_future, _ = self.shadow_client.subscribe_to_named_shadow_delta_updated_events(
# request=iotshadow.NamedShadowDeltaUpdatedSubscriptionRequest(thing_name=self.thing_name,shadow_name=SHADOW_NAME),
# qos=mqtt.QoS.AT_LEAST_ONCE,
# callback=on_shadow_delta_update)
delta_subscribed_future.result()
print("Subscribed to shadow delta. Waiting for delta event")
def main(self, args):
# logging.debug("Spinning up Shadow awsiot resources")
event_loop_group = io.EventLoopGroup(1)
host_resolver = io.DefaultHostResolver(event_loop_group)
client_bootstrap = io.ClientBootstrap(event_loop_group, host_resolver)
# logging.debug("Shadow resources up")
if args.use_websocket == True:
proxy_options = None
if (args.proxy_host):
proxy_options = http.HttpProxyOptions(
host_name=args.proxy_host, port=args.proxy_port)
credentials_provider = auth.AwsCredentialsProvider.new_default_chain(
client_bootstrap)
self.mqtt_connection = mqtt_connection_builder.websockets_with_default_aws_signing(
endpoint=args.endpoint,
client_bootstrap=client_bootstrap,
region=args.signing_region,
credentials_provider=credentials_provider,
websocket_proxy_options=proxy_options,
ca_filepath=args.root_ca,
client_id=args.client_id,
clean_session=False,
keep_alive_secs=6)
else:
# attrs = vars(args)
# print(', '.join("%s: %s" % item for item in list(attrs.items())))
self.mqtt_connection = mqtt_connection_builder.mtls_from_path(
endpoint=args.endpoint,
cert_filepath=args.cert,
pri_key_filepath=args.key,
client_bootstrap=client_bootstrap,
ca_filepath=args.root_ca,
client_id=args.client_id,
clean_session=False,
keep_alive_secs=6)
print("Connecting to {} with client ID '{}'...".format(
args.endpoint, args.client_id))
logging.debug("Connecting to {} with client ID '{}'...".format(
args.endpoint, args.client_id))
connected_future = self.mqtt_connection.connect()
self.shadow_client = iotshadow.IotShadowClient(self.mqtt_connection)
# Wait for connection to be fully established.
# Note that it's not necessary to wait, commands issued to the
# mqtt_connection before its fully connected will simply be queued.
# But this sample waits here so it's obvious when a connection
# fails or succeeds.
connected_future.result()
print("Connected!")
logging.debug("Connected!")
try:
# Subscribe to necessary topics.
# Note that is **is** important to wait for "accepted/rejected" subscriptions
# to succeed before publishing the corresponding "request".
# print("Subscribing to Delta events...")
delta_subscribed_future, _ = self.shadow_client.subscribe_to_shadow_delta_updated_events(
request=iotshadow.ShadowDeltaUpdatedSubscriptionRequest(
args.thing_name),
qos=mqtt.QoS.AT_LEAST_ONCE,
callback=self.on_shadow_delta_updated)
# Wait for subscription to succeed
delta_subscribed_future.result()
# print("Subscribing to Update responses...")
update_accepted_subscribed_future, _ = self.shadow_client.subscribe_to_update_shadow_accepted(
request=iotshadow.UpdateShadowSubscriptionRequest(
args.thing_name),
qos=mqtt.QoS.AT_LEAST_ONCE,
callback=self.on_update_shadow_accepted)
update_rejected_subscribed_future, _ = self.shadow_client.subscribe_to_update_shadow_rejected(
request=iotshadow.UpdateShadowSubscriptionRequest(
args.thing_name),
qos=mqtt.QoS.AT_LEAST_ONCE,
callback=self.on_update_shadow_rejected)
# Wait for subscriptions to succeed
update_accepted_subscribed_future.result()
update_rejected_subscribed_future.result()
# print("Subscribing to Get responses...")
get_accepted_subscribed_future, _ = self.shadow_client.subscribe_to_get_shadow_accepted(
request=iotshadow.GetShadowSubscriptionRequest(
args.thing_name),
qos=mqtt.QoS.AT_LEAST_ONCE,
callback=self.on_get_shadow_accepted)
get_rejected_subscribed_future, _ = self.shadow_client.subscribe_to_get_shadow_rejected(
request=iotshadow.GetShadowSubscriptionRequest(
args.thing_name),
qos=mqtt.QoS.AT_LEAST_ONCE,
callback=self.on_get_shadow_rejected)
# Wait for subscriptions to succeed
get_accepted_subscribed_future.result()
get_rejected_subscribed_future.result()
# The rest of the sample runs asyncronously.
# Issue request for shadow's current state.
# The response will be received by the on_get_accepted() callback
# print("Requesting current shadow state...")
publish_get_future = self.shadow_client.publish_get_shadow(
request=iotshadow.GetShadowRequest(args.thing_name),
qos=mqtt.QoS.AT_LEAST_ONCE)
# Ensure that publish succeeds
publish_get_future.result()
# Launch thread to handle user input.
# A "daemon" thread won't prevent the program from shutting down.
# print("Launching thread to read user input...")
# user_input_thread = threading.Thread(target=user_input_thread_fn, name='user_input_thread')
# user_input_thread.daemon = True
# user_input_thread.start()
# Launch thread to send telemetry updates to shadow
self.telemetry_thread = threading.Thread(
target=self.get_robot_telemetry,
name='Robot Telemetry Thread',
args=(args.robot_url, args.robot_ca))
# self.telemetry_thread.daemon = True
self.telemetry_thread.start()
except Exception as e:
self.exit(e)
# Wait for the sample to finish (user types 'quit', or an error occurs)
self.is_sample_done.wait()
# Wait for connection to be fully established.
# Note that it's not necessary to wait, commands issued to the
# mqtt_connection before its fully connected will simply be queued.
# But this sample waits here so it's obvious when a connection
# fails or succeeds.
connected_future.result()
print("Connected!")
try:
# Subscribe to necessary topics.
# Note that is **is** important to wait for "accepted/rejected" subscriptions
# to succeed before publishing the corresponding "request".
print("Subscribing to Delta events...")
delta_subscribed_future, _ = shadow_client.subscribe_to_shadow_delta_updated_events(
request=iotshadow.ShadowDeltaUpdatedSubscriptionRequest(thing_name=args.thing_name),
qos=mqtt.QoS.AT_LEAST_ONCE,
callback=on_shadow_delta_updated)
# Wait for subscription to succeed
delta_subscribed_future.result()
print("Subscribing to Update responses...")
update_accepted_subscribed_future, _ = shadow_client.subscribe_to_update_shadow_accepted(
request=iotshadow.UpdateShadowSubscriptionRequest(thing_name=args.thing_name),
qos=mqtt.QoS.AT_LEAST_ONCE,
callback=on_update_shadow_accepted)
update_rejected_subscribed_future, _ = shadow_client.subscribe_to_update_shadow_rejected(
request=iotshadow.UpdateShadowSubscriptionRequest(thing_name=args.thing_name),
qos=mqtt.QoS.AT_LEAST_ONCE,
def device_main():
"""
main loop for dummy device
"""
global device_name, mqtt_connection, shadow_client
sensor = SenseHat()
init_info = arg_check()
device_name = init_info['device_name']
iot_endpoint = init_info['endpoint']
rootca_file = init_info['certs'][0]
private_key_file = init_info['certs'][1]
certificate_file = init_info['certs'][2]
logger.info("device_name: %s", device_name)
logger.info("endpoint: %s", iot_endpoint)
logger.info("rootca cert: %s", rootca_file)
logger.info("private key: %s", private_key_file)
logger.info("certificate: %s", certificate_file)
# Spin up resources
event_loop_group = io.EventLoopGroup(1)
host_resolver = io.DefaultHostResolver(event_loop_group)
client_bootstrap = io.ClientBootstrap(event_loop_group, host_resolver)
mqtt_connection = mqtt_connection_builder.mtls_from_path(
endpoint=iot_endpoint,
cert_filepath=certificate_file,
pri_key_filepath=private_key_file,
client_bootstrap=client_bootstrap,
ca_filepath=rootca_file,
client_id=device_name,
clean_session=False,
keep_alive_secs=KEEP_ALIVE)
connected_future = mqtt_connection.connect()
shadow_client = iotshadow.IotShadowClient(mqtt_connection)
connected_future.result()
print("Check latest Shadow status")
get_accepted_subscribed_future, _ = shadow_client.subscribe_to_get_shadow_accepted(
request=iotshadow.GetShadowSubscriptionRequest(device_name),
qos=mqtt.QoS.AT_LEAST_ONCE,
callback=on_get_shadow_accepted)
get_rejected_subscribed_future, _ = shadow_client.subscribe_to_get_shadow_rejected(
request=iotshadow.GetShadowSubscriptionRequest(device_name),
qos=mqtt.QoS.AT_LEAST_ONCE,
callback=on_get_shadow_rejected)
# Wait for subscriptions to succeed
get_accepted_subscribed_future.result()
get_rejected_subscribed_future.result()
publish_get_future = shadow_client.publish_get_shadow(
request=iotshadow.GetShadowRequest(device_name),
qos=mqtt.QoS.AT_LEAST_ONCE)
# Ensure that publish succeeds
publish_get_future.result()
logger.info("Subscribing to Shadow Delta events...")
delta_subscribed_future, _ = shadow_client.subscribe_to_shadow_delta_updated_events(
request=iotshadow.ShadowDeltaUpdatedSubscriptionRequest(device_name),
qos=mqtt.QoS.AT_LEAST_ONCE,
callback=on_shadow_delta_updated)
# Wait for subscription to succeed
delta_subscribed_future.result()
logger.info("Subscribing to Shadow Update responses...")
update_accepted_subscribed_future, _ = shadow_client.subscribe_to_update_shadow_accepted(
request=iotshadow.UpdateShadowSubscriptionRequest(device_name),
qos=mqtt.QoS.AT_LEAST_ONCE,
callback=on_update_shadow_accepted)
update_rejected_subscribed_future, _ = shadow_client.subscribe_to_update_shadow_rejected(
request=iotshadow.UpdateShadowSubscriptionRequest(device_name),
qos=mqtt.QoS.AT_LEAST_ONCE,
callback=on_update_shadow_rejected)
# Wait for subscriptions to succeed
update_accepted_subscribed_future.result()
update_rejected_subscribed_future.result()
# Start sending dummy data
topic = BASE_TOPIC + device_name
logging.info("topic: %s", topic)
while True:
now = datetime.now().strftime('%Y-%m-%dT%H:%M:%S')
humi = sensor.temperature
temp = sensor.humidity
payload = {
"DEVICE_NAME": device_name,
"TIMESTAMP": now,
"TEMPERATURE": int(temp),
"HUMIDITY": int(humi)
}
logger.debug(" payload: %s", payload)
mqtt_connection.publish(topic=topic,
payload=json.dumps(payload),
qos=mqtt.QoS.AT_LEAST_ONCE)
time.sleep(wait_time)