how to subscribe the topic

[yashram96]

as far i understand for publishing "Esp32MQTTClient_SendEventInstance()" function is used . But how to subscribe the topic . Please share the details .

[pchevallier]

The function: "EVENT_INSTANCE* message = Esp32MQTTClient_Event_Generate(messagePayload, MESSAGE);" create the payload with all the json content in it that will be published to its Azure IoT Hub using the IoT device referenced in:
static const char* connectionString = "";

Once published, IoT Hub will direct the message to any services subscribed to it.