Hi, I´m trying to integrate Alexa into a Home Assistant that I have installed on a Raspberry Pi 4.
I have my domain on Cloudflare and I am using a certificate provided by Cloudflare for the connection over HTTPS.
I have done as indicated in this thread https://www.home-assistant.io/integrations/alexa.smart_home/
I have also followed several Youtube tutorials and I still can’t get the integration right, as the Lambda function returns an error and I don’t know how to fix it. I can’t link my account with the skill from the Alexa APP.
This is my code for the Lambda function:
import os
import json
import logging
import urllib3
_debug = bool(os.environ.get('DEBUG'))
_logger = logging.getLogger('HomeAssistant-SmartHome')
_logger.setLevel(logging.DEBUG if _debug else logging.INFO)
def lambda_handler(event, context):
"""Handle incoming Alexa directive."""
_logger.debug('Event: %s', event)
base_url = os.environ.get('BASE_URL')
assert base_url is not None, 'Please set BASE_URL environment variable'
directive = event.get('directive')
assert directive is not None, 'Malformatted request - missing directive'
assert directive.get('header', {}).get('payloadVersion') == '3', \
'Only support payloadVersion == 3'
scope = directive.get('endpoint', {}).get('scope')
if scope is None:
# token is in grantee for Linking directive
scope = directive.get('payload', {}).get('grantee')
if scope is None:
# token is in payload for Discovery directive
scope = directive.get('payload', {}).get('scope')
assert scope is not None, 'Malformatted request - missing endpoint.scope'
assert scope.get('type') == 'BearerToken', 'Only support BearerToken'
token = scope.get('token')
if token is None and _debug:
token = os.environ.get('LONG_LIVED_ACCESS_TOKEN') # only for debug purpose
verify_ssl = not bool(os.environ.get('NOT_VERIFY_SSL'))
http = urllib3.PoolManager(
cert_reqs='CERT_REQUIRED' if verify_ssl else 'CERT_NONE',
timeout=urllib3.Timeout(connect=2.0, read=10.0)
)
response = http.request(
'POST',
'{}/api/alexa/smart_home'.format(base_url),
headers={
'Authorization': 'Bearer {}'.format(token),
'Content-Type': 'application/json',
},
body=json.dumps(event).encode('utf-8'),
)
if response.status >= 400:
return {
'event': {
'payload': {
'type': 'INVALID_AUTHORIZATION_CREDENTIAL'
if response.status in (401, 403) else 'INTERNAL_ERROR',
'message': response.data.decode("utf-8"),
}
}
}
return json.loads(response.data.decode('utf-8'))
This is the code for the Test Event:
{
"directive": {
"header": {
"namespace": "Alexa.Discovery",
"name": "Discover",
"payloadVersion": "3",
"messageId": "1bd5d003-31b9-476f-ad03-71d471922820"
},
"payload": {
"scope": {
"type": "BearerToken",
"token": "wmaieQ0KeXGVtFdaQw_nlJMOkrMA3kn6t4qwFGjnG9kjj"
}
}
}
}
This is the response:
{
"event": {
"payload": {
"type": "INTERNAL_ERROR",
"message": "404: Not Found"
}
}
}