Subscribing to topics with Python
The code calls the
client.subscribe method with
"test/drone01" as an argument to subscribe to this specific single topic and the
qos argument set to
2 to request a QoS level of 2.
In this case, we will only subscribe to one topic. However, it is very important to know that we are not limited to subscribe to a single topic filter; we may subscribe to many topic filters with a single call to the
After the MQTT server confirms the successful subscription to the specified topic filter, the specified callback in the
client.on_subscribe attribute will be executed, that is, the
on_subscribe function. This function receives a list of integers in the
granted_qos argument that provides the QoS level that ...