Puertas de enlace

En esta página, se explica cómo las puertas de enlace pueden enviar datos y mensajes de configuración de retransmisión para dispositivos asociados.

La app de demostración de concentrador escucha los mensajes de configuración y envía información de estado en nombre de un dispositivo para mostrar cómo funcionan las puertas de enlace de extremo a extremo. Esta app puede usar la muestra de administrador existente o las funciones locales para administrar dispositivos y usa la muestra de concentrador para administrar un dispositivo vinculado y conectarse al puente del protocolo MQTT en nombre de ese dispositivo.

Cuando se ejecute la demostración, verás un resultado similar al siguiente.

Running demo

Creating registry: test-registry-1541200612
Created registry

Creating gateway: test-device-RS256
Created gateway {u'gatewayConfig': {u'gatewayType': u'GATEWAY', u'gatewayAuthMethod': u'ASSOCIATION_ONLY'} ... }
Creating device to bind: test-device-noauthbind
Created Device {u'numId': u'2552202179450953', u'config': {u'version': u'1', u'cloudUpdateTime': u'2018-11-02T23:16:58.198419Z'}, u'id': u'test-device-noauthbind', u'gatewayConfig': {u'gatewayType': u'NON_GATEWAY', u'gatewayAuthMethod': u'ASSOCIATION_ONLY'} ...}

Binding device
Device Bound!
Listening for messages for 30 seconds
Try setting configuration in:
  https://console.cloud.google.com/iot/locations/us-central1/registries/test-registry-1541200612?project=noun-verb-123
Press enter to continue

Creating JWT using RS256 from private key file resources/rsa_private.pem
Attaching: /devices/test-device-noauthbind/attach
Waiting for device to attach.
('on_connect', 'Connection Accepted.')
on_publish
on_subscribe
Received message 'device-config' on topic '/devices/test-device-noauthbind/config' with Qos 1
on_subscribe
Received message 'gateway-config' on topic '/devices/test-device-RS256/config' with Qos 1
Detaching: /devices/test-device-noauthbind/detach
Finished.

Publishing messages demo
Publishing: 15 messages
Creating JWT using RS256 from private key file resources/rsa_private.pem
Attaching: /devices/test-device-noauthbind/attach
Waiting for device to attach.
Starting HUB at: 1541200710.73
('on_connect', 'Connection Accepted.')
on_publish
Publishing message 1/15: 'test-registry-1541200612/test-device-RS256-test-device-noauthbind-payload-1' to /devices/test-device-noauthbind/state
...
on_publish
Publishing message 15/15: 'test-registry-1541200612/test-device-RS256-test-device-noauthbind-payload-15' to /devices/test-device-noauthbind/state
Detaching: /devices/test-device-noauthbind/detach
on_publish
Finished.

You can read the state messages for your device at this URL:
    https://console.cloud.google.com/iot/locations/us-central1/registries/test-registry-1541200612/devices/test-device-noauthbind?project=noun-verb-1234

Device unbound: {}
Delete device
Delete device
Delete registry

El siguiente código muestra la fuente completa de la secuencia de comandos de demostración:

Python

import csv
import datetime
import io
import logging
import os
import time

from google.cloud import pubsub

# import manager  # TODO(class) when feature exits beta, remove borrowed defs
import hub

logging.getLogger('googleapiclient.discovery_cache').setLevel(logging.CRITICAL)

cloud_region = 'us-central1'
device_id_template = 'test-device-{}'
gateway_id_template = 'test-gateway-{}'
topic_id = 'test-device-events-{}'.format(int(time.time()))

ca_cert_path = 'resources/roots.pem'
log_path = 'config_log.csv'
rsa_cert_path = 'resources/rsa_cert.pem'
rsa_private_path = 'resources/rsa_private.pem'

if ('GCLOUD_PROJECT' not in os.environ or
        'GOOGLE_APPLICATION_CREDENTIALS' not in os.environ):
    print(
      'You must set GCLOUD_PROJECT and GOOGLE_APPLICATION_CREDENTIALS')
    quit()

project_id = os.environ['GCLOUD_PROJECT']
service_account_json = os.environ['GOOGLE_APPLICATION_CREDENTIALS']

pubsub_topic = 'projects/{}/topics/{}'.format(project_id, topic_id)
registry_id = 'test-registry-{}'.format(int(time.time()))

base_url = 'https://console.cloud.google.com/iot/locations/{}'.format(
        cloud_region)
edit_template = '{}/registries/{}?project={}'.format(
        base_url, '{}', '{}')

device_url_template = '{}/registries/{}/devices/{}?project={}'.format(
        base_url, '{}', '{}', '{}')

mqtt_bridge_hostname = 'mqtt.googleapis.com'
mqtt_bridge_port = 8883

num_messages = 15
jwt_exp_time = 20
listen_time = 30

def create_iot_topic(project, topic_name):
    """Creates a PubSub Topic and grants access to Cloud IoT Core."""
    pubsub_client = pubsub.PublisherClient()
    topic_path = pubsub_client.topic_path(project, topic_name)

    topic = pubsub_client.create_topic(topic_path)
    policy = pubsub_client.get_iam_policy(topic_path)

    policy.bindings.add(
        role='roles/pubsub.publisher',
        members=['serviceAccount:[e-mail]'])

    pubsub_client.set_iam_policy(topic_path, policy)

    return topic

def create_registry(
        service_account_json, project_id, cloud_region, pubsub_topic,
        registry_id):
    """ Creates a registry and returns the result. Returns an empty result if
    the registry already exists."""
    client = hub.get_client(service_account_json)
    registry_parent = 'projects/{}/locations/{}'.format(
            project_id,
            cloud_region)
    body = {
        'eventNotificationConfigs': [{
            'pubsubTopicName': pubsub_topic
        }],
        'id': registry_id
    }
    request = client.projects().locations().registries().create(
        parent=registry_parent, body=body)

    response = request.execute()
    print('Created registry')
    return response

def delete_registry(
       service_account_json, project_id, cloud_region, registry_id):
    """Deletes the specified registry."""
    print('Delete registry')
    client = hub.get_client(service_account_json)
    registry_name = 'projects/{}/locations/{}/registries/{}'.format(
            project_id, cloud_region, registry_id)

    registries = client.projects().locations().registries()
    return registries.delete(name=registry_name).execute()

def create_device(
        service_account_json, project_id, cloud_region, registry_id,
        device_id, certificate_file):
    """Create a new device without authentication."""
    registry_name = 'projects/{}/locations/{}/registries/{}'.format(
            project_id, cloud_region, registry_id)

    with io.open(certificate_file) as f:
        certificate = f.read()

    client = hub.get_client(service_account_json)
    device_template = {
        'id': device_id,
        'credentials': [{
            'publicKey': {
                'format': 'RSA_X509_PEM',
                'key': certificate
            }
        }]
    }

    devices = client.projects().locations().registries().devices()
    return devices.create(parent=registry_name, body=device_template).execute()

def delete_device(
        service_account_json, project_id, cloud_region, registry_id,
        device_id):
    """Delete the device with the given id."""
    print('Delete device')
    client = hub.get_client(service_account_json)
    registry_name = 'projects/{}/locations/{}/registries/{}'.format(
            project_id, cloud_region, registry_id)

    device_name = '{}/devices/{}'.format(registry_name, device_id)

    devices = client.projects().locations().registries().devices()
    return devices.delete(name=device_name).execute()

if __name__ == '__main__':
    print("Running demo")

    gateway_id = device_id_template.format('RS256')
    device_id = device_id_template.format('noauthbind')

    print('Creating registry: {}'.format(registry_id))
    create_registry(
            service_account_json, project_id, cloud_region, pubsub_topic,
            registry_id)

    print('Creating gateway: {}'.format(gateway_id))
    hub.create_gateway(
            service_account_json, project_id, cloud_region, registry_id,
            None, gateway_id, rsa_cert_path, 'RS256')

    print('Creating device to bind: {}'.format(device_id))
    hub.create_device(
            service_account_json, project_id, cloud_region, registry_id,
            device_id)

    print('Binding device')
    hub.bind_device_to_gateway(
            service_account_json, project_id, cloud_region, registry_id,
            device_id, gateway_id)

    print('Listening for messages for {} seconds'.format(listen_time))
    print('Try setting configuration in: ')
    print('\t{}'.format(edit_template.format(registry_id, project_id)))
    try:
        input("Press enter to continue")
    except SyntaxError:
        pass

    def log_callback (client):
        def log_on_message(unused_client, unused_userdata, message):
            if not os.path.exists(log_path):
                with open(log_path, 'w') as csvfile:
                    logwriter = csv.writer(csvfile, dialect='excel')
                    logwriter.writerow(['time', 'topic', 'data'])

            with open(log_path, 'a') as csvfile:
                logwriter = csv.writer(csvfile, dialect='excel')
                logwriter.writerow([
                        datetime.datetime.now().isoformat(),
                        message.topic,
                        message.payload])

        client.on_message = log_on_message

    hub.listen_for_config_messages(
                service_account_json, project_id, cloud_region, registry_id,
                device_id, gateway_id, num_messages, rsa_private_path, 'RS256',
                ca_cert_path, mqtt_bridge_hostname, mqtt_bridge_port,
                jwt_exp_time, listen_time, log_callback)

    print('Publishing messages demo')
    print('Publishing: {} messages'.format(num_messages))
    hub.send_data_from_bound_device(
                service_account_json, project_id, cloud_region, registry_id,
                device_id, gateway_id, num_messages, rsa_private_path, 'RS256',
                ca_cert_path, mqtt_bridge_hostname, mqtt_bridge_port,
                jwt_exp_time, "Hello from hub_demo.py")

    print('You can read the state messages for your device at this URL:')
    print('\t{}'.format(device_url_template).format(
            registry_id, device_id, project_id))
    try:
        input('Press enter to continue after reading the messages.')
    except SyntaxError:
        pass

    # Clean up
    hub.unbind_device_from_gateway(
            service_account_json, project_id, cloud_region, registry_id,
            device_id, gateway_id)
    delete_device(
            service_account_json, project_id, cloud_region, registry_id,
            device_id)
    delete_device(
            service_account_json, project_id, cloud_region, registry_id,
            gateway_id)
    delete_registry(
            service_account_json, project_id, cloud_region, registry_id)

La secuencia de comandos de demostración realiza las siguientes operaciones:

• Crea un registro de demostración
• Crea una puerta de enlace
• Cómo crear un dispositivo para vincular
• Vincula el dispositivo a la puerta de enlace
• Escucha mensajes de configuración
• Cómo enviar datos de estado
• Quita los recursos que se usaron en la demostración

Crea un registro de demostración

Primero, se crea un registro de dispositivo temporal que se limpiará cuando finalice la demostración. Este registro contendrá la puerta de enlace, que es un tipo especial de dispositivo, así como un dispositivo que administrará la puerta de enlace. El código de muestra de registro de creación se usa para hacer esto.

Python

print('Creating registry: {}'.format(registry_id))
create_registry(
        service_account_json, project_id, cloud_region, pubsub_topic,
        registry_id)

En el siguiente código, se muestra cómo el administrador de muestra crea un registro de dispositivo.

Python

# project_id = 'YOUR_PROJECT_ID'
# cloud_region = 'us-central1'
# pubsub_topic = 'your-pubsub-topic'
# registry_id = 'your-registry-id'
client = iot_v1.DeviceManagerClient()
parent = f"projects/{project_id}/locations/{cloud_region}"

if not pubsub_topic.startswith("projects/"):
    pubsub_topic = "projects/{}/topics/{}".format(project_id, pubsub_topic)

body = {
    "event_notification_configs": [{"pubsub_topic_name": pubsub_topic}],
    "id": registry_id,
}

try:
    response = client.create_device_registry(
        request={"parent": parent, "device_registry": body}
    )
    print("Created registry")
    return response
except HttpError:
    print("Error, registry not created")
    raise
except AlreadyExists:
    print("Error, registry already exists")
    raise

Después de crear el registro, estarás listo para agregar dispositivos.

Crea una puerta de enlace

El primer dispositivo que se agrega al registro es un tipo especial de dispositivo llamado puerta de enlace. Este dispositivo puede tener su propia configuración asociada y también puede tener otros dispositivos vinculados para que pueda comportarse como un proxy. Después de crearlo, el dispositivo de puerta de enlace puede conectarse al puente de protocolo de Cloud IoT Core con sus credenciales asociadas.

Python

print('Creating gateway: {}'.format(gateway_id))
hub.create_gateway(
        service_account_json, project_id, cloud_region, registry_id,
        None, gateway_id, rsa_cert_path, 'RS256')

El siguiente código muestra cómo la muestra central crea el dispositivo de puerta de enlace especial.

Python

"""Create a gateway to bind devices to."""
# Check that the gateway doesn't already exist
exists = False
client = get_client(service_account_json)
registry_path = 'projects/{}/locations/{}/registries/{}'.format(
        project_id, cloud_region, registry_id)

devices = client.projects().locations().registries().devices(
        ).list(
                parent=registry_path, fieldMask='config,gatewayConfig'
        ).execute().get('devices', [])

for device in devices:
        if device.get('id') == gateway_id:
            exists = True
        print('Device: {} : {} : {} : {}'.format(
            device.get('id'),
            device.get('numId'),
            device.get('config'),
            device.get('gatewayConfig')
            ))

# Create the gateway
registry_name = 'projects/{}/locations/{}/registries/{}'.format(
        project_id, cloud_region, registry_id)

with io.open(certificate_file) as f:
    certificate = f.read()

if algorithm == 'ES256':
    certificate_format = 'ES256_PEM'
else:
    certificate_format = 'RSA_X509_PEM'

# TODO: Auth type
device_template = {
    'id': gateway_id,
    'credentials': [{
        'publicKey': {
            'format': certificate_format,
            'key': certificate
        }
    }],
    'gatewayConfig': {
      'gatewayType': 'GATEWAY',
      'gatewayAuthMethod': 'ASSOCIATION_ONLY'
    }
}
devices = client.projects().locations().registries().devices()

if not exists:
    res = devices.create(
            parent=registry_name, body=device_template).execute()
    print('Created gateway {}'.format(res))
else:
    print('Gateway exists, skipping')

Crea un dispositivo para vincular

Antes de poder vincular un dispositivo a una puerta de enlace, se debe crear un dispositivo dentro del registro con la puerta de enlace. La demostración usa la muestra central para crear un dispositivo.

Python

print('Creating device to bind: {}'.format(device_id))
hub.create_device(
        service_account_json, project_id, cloud_region, registry_id,
        device_id)

En el siguiente código, se muestra cómo la muestra central crea el dispositivo para la vinculación.

Python

# Check that the device doesn't already exist
exists = False

client = get_client(service_account_json)
registry_path = 'projects/{}/locations/{}/registries/{}'.format(
        project_id, cloud_region, registry_id)

devices = client.projects().locations().registries().devices(
        ).list(
                parent=registry_path, fieldMask='config,gatewayConfig'
        ).execute().get('devices', [])

for device in devices:
        if device.get('id') == device_id:
            exists = True

# Create the device
registry_name = 'projects/{}/locations/{}/registries/{}'.format(
        project_id, cloud_region, registry_id)

device_template = {
    'id': device_id,
    'gatewayConfig': {
      'gatewayType': 'NON_GATEWAY',
      'gatewayAuthMethod': 'ASSOCIATION_ONLY'
    }
}
devices = client.projects().locations().registries().devices()

if not exists:
    res = devices.create(
            parent=registry_name, body=device_template).execute()
    print('Created Device {}'.format(res))
else:
    print('Device exists, skipping')

Vincular el dispositivo a la puerta de enlace

Con el dispositivo y la puerta de enlace en el registro de demostración, estás listo para vincular el dispositivo a la puerta de enlace. Cuando se vincula el dispositivo a la puerta de enlace, se permite la conexión y desconexión del dispositivo a través de su conexión con el puente de protocolo de Cloud IoT Core. La app de demostración usa la muestra de concentrador para hacer esto de la siguiente manera.

Python

print('Binding device')
hub.bind_device_to_gateway(
        service_account_json, project_id, cloud_region, registry_id,
        device_id, gateway_id)

En el siguiente código, se muestra cómo el concentrador vincula el dispositivo a la puerta de enlace.

Python

client = get_client(service_account_json)

create_device(
        service_account_json, project_id, cloud_region, registry_id,
        device_id)

registry_name = 'projects/{}/locations/{}/registries/{}'.format(
        project_id, cloud_region, registry_id)
bind_request = {
    'deviceId': device_id,
    'gatewayId': gateway_id
}
client.projects().locations().registries().bindDeviceToGateway(
        parent=registry_name, body=bind_request).execute()
print('Device Bound!')

Escucha mensajes de configuración

Una vez que el dispositivo está vinculado a la puerta de enlace, la puerta de enlace puede conectarse al puente de protocolo de Cloud IoT Core, conectar el dispositivo y, luego, recibir mensajes de configuración para ese dispositivo. Para ello, la demostración usa una función auxiliar en la muestra de concentrador.

Python

print('Listening for messages for {} seconds'.format(listen_time))
print('Try setting configuration in: ')
print('\t{}'.format(edit_template.format(registry_id, project_id)))
try:
    input("Press enter to continue")
except SyntaxError:
    pass

def log_callback (client):
    def log_on_message(unused_client, unused_userdata, message):
        if not os.path.exists(log_path):
            with open(log_path, 'w') as csvfile:
                logwriter = csv.writer(csvfile, dialect='excel')
                logwriter.writerow(['time', 'topic', 'data'])

        with open(log_path, 'a') as csvfile:
            logwriter = csv.writer(csvfile, dialect='excel')
            logwriter.writerow([
                    datetime.datetime.now().isoformat(),
                    message.topic,
                    message.payload])

    client.on_message = log_on_message

hub.listen_for_config_messages(
            service_account_json, project_id, cloud_region, registry_id,
            device_id, gateway_id, num_messages, rsa_private_path, 'RS256',
            ca_cert_path, mqtt_bridge_hostname, mqtt_bridge_port,
            jwt_exp_time, listen_time, log_callback)

En la muestra central, el cliente Paho MQTT se usa para conectarse al puente de protocolo de la siguiente manera.

Python

global minimum_backoff_time

jwt_iat = datetime.datetime.utcnow()
jwt_exp_mins = jwt_expires_minutes
# Use gateway to connect to server
client = get_mqtt_client(
    project_id, cloud_region, registry_id, gateway_id,
    private_key_file, algorithm, ca_certs, mqtt_bridge_hostname,
    mqtt_bridge_port)

attach_device(client, device_id)
print('Waiting for device to attach.')
time.sleep(5)

# The topic devices receive configuration updates on.
device_config_topic = '/devices/{}/config'.format(device_id)
client.subscribe(device_config_topic, qos=1)

# The topic gateways receive configuration updates on.
gateway_config_topic = '/devices/{}/config'.format(gateway_id)
client.subscribe(gateway_config_topic, qos=1)

# The topic gateways receive error updates on. QoS must be 0.
error_topic = '/devices/{}/errors'.format(gateway_id)
client.subscribe(error_topic, qos=0)

# Wait for about a minute for config messages.
for i in range(1, duration):
    client.loop()

    if should_backoff:
        # If backoff time is too large, give up.
        if minimum_backoff_time > MAXIMUM_BACKOFF_TIME:
            print('Exceeded maximum backoff time. Giving up.')
            break

        delay = minimum_backoff_time + random.randint(0, 1000) / 1000.0
        time.sleep(delay)
        minimum_backoff_time *= 2
        client.connect(mqtt_bridge_hostname, mqtt_bridge_port)

    seconds_since_issue = (datetime.datetime.utcnow() - jwt_iat).seconds
    if seconds_since_issue > 60 * jwt_exp_mins:
        print('Refreshing token after {}s').format(seconds_since_issue)
        jwt_iat = datetime.datetime.utcnow()
        client = get_mqtt_client(
            project_id, cloud_region, registry_id, gateway_id,
            private_key_file, algorithm, ca_certs, mqtt_bridge_hostname,
            mqtt_bridge_port)

    time.sleep(1)

detach_device(client, device_id)

print('Finished.')

Ten en cuenta que la muestra se detiene antes de comenzar este paso para que puedas navegar a la consola para desarrolladores antes de comenzar a escuchar y establecer datos de configuración para la puerta de enlace o el dispositivo vinculado y puedas verifique que se esté recibiendo la configuración más reciente.

Enviar datos de estado

Después de demostrar cómo puedes recibir mensajes de configuración en nombre de una puerta de enlace y sus dispositivos vinculados, la app de demostración envía datos de estado en nombre del dispositivo asociado. Para ello, la demostración usa la función auxiliar de la app de muestra de Hub.

Python

print('Publishing messages demo')
print('Publishing: {} messages'.format(num_messages))
hub.send_data_from_bound_device(
            service_account_json, project_id, cloud_region, registry_id,
            device_id, gateway_id, num_messages, rsa_private_path, 'RS256',
            ca_cert_path, mqtt_bridge_hostname, mqtt_bridge_port,
            jwt_exp_time, "Hello from hub_demo.py")

print('You can read the state messages for your device at this URL:')
print('\t{}'.format(device_url_template).format(
        registry_id, device_id, project_id))
try:
    input('Press enter to continue after reading the messages.')
except SyntaxError:
    pass

Python

global minimum_backoff_time

# Publish device events and gateway state.
device_topic = '/devices/{}/{}'.format(device_id, 'state')
gateway_topic = '/devices/{}/{}'.format(gateway_id, 'state')

jwt_iat = datetime.datetime.utcnow()
jwt_exp_mins = jwt_expires_minutes
# Use gateway to connect to server
client = get_mqtt_client(
    project_id, cloud_region, registry_id, gateway_id,
    private_key_file, algorithm, ca_certs, mqtt_bridge_hostname,
    mqtt_bridge_port)

attach_device(client, device_id)
print('Waiting for device to attach.')
time.sleep(5)

# Publish state to gateway topic
gateway_state = 'Starting HUB at: {}'.format(time.time())
print(gateway_state)
client.publish(gateway_topic, gateway_state, qos=1)

# Publish num_messages mesages to the MQTT bridge
for i in range(1, num_messages + 1):
    client.loop()

    if should_backoff:
        # If backoff time is too large, give up.
        if minimum_backoff_time > MAXIMUM_BACKOFF_TIME:
            print('Exceeded maximum backoff time. Giving up.')
            break

        delay = minimum_backoff_time + random.randint(0, 1000) / 1000.0
        time.sleep(delay)
        minimum_backoff_time *= 2
        client.connect(mqtt_bridge_hostname, mqtt_bridge_port)

    payload = '{}/{}-{}-payload-{}'.format(
            registry_id, gateway_id, device_id, i)

    print('Publishing message {}/{}: \'{}\' to {}'.format(
            i, num_messages, payload, device_topic))
    client.publish(
            device_topic, '{} : {}'.format(device_id, payload), qos=1)

    seconds_since_issue = (datetime.datetime.utcnow() - jwt_iat).seconds
    if seconds_since_issue > 60 * jwt_exp_mins:
        print('Refreshing token after {}s').format(seconds_since_issue)
        jwt_iat = datetime.datetime.utcnow()
        client = get_mqtt_client(
            project_id, cloud_region, registry_id, gateway_id,
            private_key_file, algorithm, ca_certs, mqtt_bridge_hostname,
            mqtt_bridge_port)

    time.sleep(5)

detach_device(client, device_id)

print('Finished.')

La demostración se pausará después de transmitir los datos de estado en nombre del dispositivo vinculado para que puedas navegar a la consola para desarrolladores antes de que se quiten los dispositivos y los registros de demostración en el siguiente paso.

Quita los recursos que se usaron en la demostración

Cuando la demostración termina, libera los dispositivos y registros que se asignaron al principio.

Python

# Clean up
hub.unbind_device_from_gateway(
        service_account_json, project_id, cloud_region, registry_id,
        device_id, gateway_id)
delete_device(
        service_account_json, project_id, cloud_region, registry_id,
        device_id)
delete_device(
        service_account_json, project_id, cloud_region, registry_id,
        gateway_id)
delete_registry(
        service_account_json, project_id, cloud_region, registry_id)

El dispositivo se desenlaza de la puerta de enlace antes de que se borre.

Python

client = get_client(service_account_json)

registry_name = 'projects/{}/locations/{}/registries/{}'.format(
        project_id, cloud_region, registry_id)
bind_request = {
    'deviceId': device_id,
    'gatewayId': gateway_id
}

res = client.projects().locations().registries().unbindDeviceFromGateway(
    parent=registry_name, body=bind_request).execute()
print('Device unbound: {}'.format(res))

Se usa una función auxiliar de la muestra de administrador para borrar el dispositivo vinculado y la puerta de enlace.

Python

# project_id = 'YOUR_PROJECT_ID'
# cloud_region = 'us-central1'
# registry_id = 'your-registry-id'
# device_id = 'your-device-id'
print("Delete device")
client = iot_v1.DeviceManagerClient()

device_path = client.device_path(project_id, cloud_region, registry_id, device_id)

return client.delete_device(request={"name": device_path})

Por último, se usa una función auxiliar de la muestra de administrador para borrar el registro.

Python

# project_id = 'YOUR_PROJECT_ID'
# cloud_region = 'us-central1'
# registry_id = 'your-registry-id'
print("Delete registry")

client = iot_v1.DeviceManagerClient()
registry_path = client.registry_path(project_id, cloud_region, registry_id)

try:
    client.delete_device_registry(request={"name": registry_path})
    print("Deleted registry")
    return "Registry deleted"
except HttpError:
    print("Error, registry not deleted")
    raise

En este punto, ha visto que la funcionalidad de la puerta de enlace funciona de extremo a extremo.