Documentation for the addition of event based messaging.

[mkmer]

Goal here to start documenting the event based message system used by Blinkapp in android.

• It appears the system uses FCM (firebase messaging) to send event based messages.

• Adding the following key to the login json message appears to link the messaging system to the app:
  "notification_key": "<redacted key here>",

• An official login JSON message sent from android (blinkpy only fills a subset):
  { "app_version": "6.29.0 (28173197) #28f4ca29a", "client_name": "Pixel 3", "client_type": "android", "device_identifier": "Google Pixel 3,google/blueline", "email": "<redacted>", "notification_key": "<redacted>", "os_version": "12", "password": "<redacted>", "reauth": true, "unique_id": "<redacted>" }

• After a notification message is received by android the app replies with:

METHOD: POST URL https://rest-u034.immedia-semi.com/api/v2/notification
HEADERS Accept-Encoding: gzip APP-BUILD: ANDROID_28173197 Connection: Keep-Alive Content-Length: 57 Content-Type: application/json; charset=UTF-8 Host: rest-u034.immedia-semi.com LOCALE: en_US User-Agent: 6.29.0ANDROID_28173197 X-Blink-Time-Zone: America/Detroit

{ "status": "received", "transaction_id": "oMFXIR25gyZy9GyA" }
Transaction_id value must be sent via the FCM message.

• The notification_key appears to be provided when the application connects to the FCM server. So we will first need to connect to FCM, get the key, then login to the app providing the given key.

• There is a library (that needs to be ported to aiohttp): https://github.com/Francesco149/push_receiver

• At this point, I have tried subscribing and using the key in blinkpy, but have not been able to receive notifications via the push_reciever app. I suspect it needs the sender_id configured, but can not located the value at this point.

Helpers wanted :)