from paho.mqtt import client as mqtt
import ssl

path_to_root_cert = "<local path to the generated testonly-rootca.pem>"
device_cert = "<local path to the generated newdevice-cert.pem>"
device_key = "<local path to the generated newdevice-key.pem>

HubName = "iothub.azure-devices.net"
devicename = "device001"

def on_connect(client, userdata, flags, rc):
print ("Connected with result code: " + str(rc))
client.subscribe("devices/" + devicename + "/messages/devicebound/#")

def on_disconnect(client, userdata, rc):
print ("Disconnected with result code: " + str(rc))

def on_message(client, userdata, msg):
print (msg.topic+" "+str(msg.payload))

client.publish("devices/" + devicename + "/messages/events/", "{id=1}",qos=1)

def on_publish(client, userdata, mid):
print ("Sent message")

client = mqtt.Client(client_id=devicename, protocol=mqtt.MQTTv311)
client.on_connect = on_connect

client.on_disconnect = on_disconnect
client.on_message = on_message
client.on_publish = on_publish
client.username_pw_set(username=HubName + "/" + devicename, password=None)
client.tls_insecure_set(False)

client.tls_set(ca_certs=path_to_root_cert, certfile=device_cert, keyfile=device_key, cert_reqs=ssl.CERT_REQUIRED, tls_version=ssl.PROTOCOL_TLSv1_2, ciphers=None)
client.connect(HubName, port=8883)
client.publish("devices/" + devicename + "/messages/events/", "{id=MQTT Test}", qos=1)
client.loop_forever()

SSL_Verification_failed