mqtt_sub()
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Description: |
Subscribes the device to the specified topic on the MQTT server (broker). |
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Syntax: |
sub mqtt_sub(byref data as string, qos as en_qos_choices) |
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Returns: |
--- |
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See Also: |
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Parameter |
Description |
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data |
The topic to subscribe to. |
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qos |
Requested quality of service, according to the en_qos_choices enum. |
Details
Callback_mqtt_sub_ok() is called when the subscription is acknowledged by the server.
Hivemq.com is has an excellent explanation of MQTT topics:
http://www.hivemq.com/blog/mqtt-essentials-part-5-mqtt-topics-best-practices