EspMQTTClient: what command starts the WiFi/MQTT connection?

Using Arduino Networking, Protocols, and Devices
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Looking at the example SimpleMQTTClient.ino I see 4 sections:

  • The client is configured
  • In setup() some more client configurations
  • Then the onConnectionEstablished() subroutine
  • Then the loop() which ensures network/MQTT communication

But where is the network started and the connection to the MQTT broker established?

Hey, it all works, but I'd like to understand why.

Thanks

OSD

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