def wait_for_nic(self, timeout=5):
"""
:param timeout: (Default value = 5)
"""
eggtimer = Eggtimer(duration=timeout)
log.info('Waiting for network interface')
while not eggtimer.expired():
self.device.watchdog.feed()
try:
# TODO: Make WiFi-agnostic.
if self.wifi_manager.is_connected():
log.info('Network interface ready')
return True
except OSError as ex:
log.warning('Network interface not available: %s',
format_exception(ex))
# Report about progress.
sys.stderr.write('.')
#sys.stderr.flush()
# Save power while waiting.
machine.idle()
time.sleep(0.25)
# TODO: Make WiFi-agnostic.
raise NetworkUnavailable('Could not connect to WiFi network')
def connect(self):
"""Connect to MQTT broker"""
try:
log.info('Connecting to MQTT broker at {} with username {}'.format(
self.server, self.username))
self.connection = self.driver_class(self.client_id,
self.server,
port=self.port,
user=self.username,
password=self.password)
self.connection.DEBUG = True
self.connection.connect()
self.connected = True
log.info('Connecting to MQTT broker at %s succeeded',
self.connection.addr)
except Exception as ex:
# FIXME: Evaluate exception. "MQTTException: 5" means "Authentication/Authorization failed".
self.connected = False
message = 'Connecting to MQTT broker at {} failed: {}'.format(
self.server, format_exception(ex))
log.exc(ex, message)
raise TelemetryAdapterError(message)
return self.connected
def wait_for_ip_stack(self, timeout=5):
eggtimer = Eggtimer(duration=timeout)
log.info('Waiting for network stack')
while not eggtimer.expired():
self.device.watchdog.feed()
try:
socket.getaddrinfo("localhost", 333)
log.info('Network stack ready')
return True
except OSError as ex:
log.warning('Network stack not available',
format_exception(ex))
# Report about progress.
sys.stderr.write('.')
#sys.stderr.flush()
# Save power while waiting.
machine.idle()
time.sleep(0.25)
# TODO: Make WiFi-agnostic.
raise NetworkUnavailable('Could not connect to WiFi network')
def send(self, request_data):
# Evaluate and handle defunctness.
if self.defunct:
if not self.defunctness_reported:
log.error('MQTT transport is defunct, please scan log '
'output for previous error messages.')
self.defunctness_reported = True
return False
# Derive MQTT topic string from URI path component.
topic = self.target.path.lstrip('/')
if not topic:
message = 'Empty MQTT topic, please configure MQTT URI with path component or topology with address'
raise TelemetryTransportError(message)
# Use payload from request.
payload = request_data['payload']
# Reporting.
log.debug('MQTT topic: %s', topic)
log.debug('MQTT payload: %s', payload)
try:
connection = self.get_connection()
connection.publish(topic, payload)
except TelemetryAdapterError as ex:
message = 'Protocol adapter not connected: {}'.format(
format_exception(ex))
raise TelemetryTransportError(message)
return True
def wait_for_nic(self, retries=5):
attempts = 0
while attempts < retries:
try:
socket.getaddrinfo("localhost", 333)
break
except OSError as ex:
log.warning('Network interface not available: %s', format_exception(ex))
log.info('Waiting for network interface')
# Save power while waiting.
machine.idle()
time.sleep(0.25)
attempts += 1
log.info('Network interface ready')
def send(self, dataframe: DataFrame):
"""
:param dataframe: defined in terkin/model.py
sends data in dataframe.payload_out per MQTT to a server
"""
# Evaluate and handle defunctness.
if self.defunct:
if not self.defunctness_reported:
log.error('MQTT transport is defunct, please scan log '
'output for previous error messages.')
self.defunctness_reported = True
return False
# Derive MQTT topic string from URI path component.
topic = self.target.path.lstrip('/')
if not topic:
message = 'Empty MQTT topic, please configure MQTT URI with path component or topology with address'
raise TelemetryTransportError(message)
# Use payload from request.
payload = dataframe.payload_out
# Reporting.
log.info('MQTT topic: %s', topic)
prettify_log = False
if prettify_log:
log.info('MQTT payload:\n\ns', dformat(payload, indent=48))
else:
log.info('MQTT payload: %s', payload)
try:
connection = self.get_connection()
connection.publish(topic, payload)
except TelemetryAdapterError as ex:
message = 'Protocol adapter not connected: {}'.format(
format_exception(ex))
raise TelemetryTransportError(message)
return True
def connect(self):
"""Connect to MQTT broker"""
try:
log.info('Connecting to MQTT broker at %s', self.server)
self.connection = self.driver_class(self.client_id,
self.server,
port=self.port)
self.connection.DEBUG = True
self.connection.connect()
self.connected = True
log.info('Connecting to MQTT broker at %s succeeded',
self.connection.addr)
except Exception as ex:
self.connected = False
message = 'Connecting to MQTT broker at {} failed: {}'.format(
self.server, format_exception(ex))
log.exception(message)
raise TelemetryAdapterError(message)
return self.connected
