lors de l'instanciation du client:
<code python>
from paho.mqtt.client import Client as MqttClient ...
from paho.mqtt.client import MQTTv5 as MQTTv5
aClie... client", protocol=MQTTv5)
</code>
<code python>
from paho.mqtt.properties import Properties
from paho.mqtt.packettypes import PacketTypes
properties=P