How to configure in Google Core IoT?

_x000D_ _x000D_ I've made a python program in Raspberry Pi 3 Model B that's supposed to connect to Google Cloud IoT Core with MQTT-protocol and get configurations. Sending data to Core has worked so far, but I just can't figure out how configuring works! Here's a code that's just supposed to get a config: import time import datetime import jwt import ssl import json import paho.mqtt.client as mqtt time_now = datetime.datetime.utcnow() #make key token = {'iat' : time_now , 'exp' : time_now + datetime.timedelta(minutes=60), 'aud' : "[PROJECT]"} r = open("[PRIVATE KEY]", 'r') pub_key = r.read() jwt_key = jwt.encode(token, pub_key, algorithm='RS256') #connect to iot-core client = mqtt.Client(client_id='projects/[PROJECT]/locations/[LOCATION]/registries/[REGISTER]/devices/[DEVICE]') client.username_pw_set(username='unused', password=jwt_key) client.tls_set(ca_certs='/home/pi/.local/lib/python2.7/site-packages/grpc/_cython/_credentials/roots.pem', tls_version=ssl.PROTOCOL_TLSv1_2) client.connect("mqtt.googleapis.com", 8883) #configure and change state state = 0 print state #naturally shows 0 print client.subscribe([DEVICE]/config, qos=1) #doesn't print custom config either, just (0,1) print state #still shows 0 configuration in Iot Core device id is: { "state": 1 } Even after running the program, the device's "state"-variable stays at 0 and the Core's Configuration & State History state that the CONFIG is "Not yet acknowledged by the device" How do I get the device's "state" variable change from 0 to 1 from Core?