April 2017
Intermediate to advanced
280 pages
6h 18m
English
Content preview from MQTT Essentials - A Lightweight IoT ProtocolBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Processing commands with Python
Now, we want to make a drone process the following commands:
{"COMMAND": "SET_MAX_ALTITUDE", "FEET": 20}
{"COMMAND": "SET_MIN_ALTITUDE", "FEET": 10}
{"COMMAND": "TAKE_OFF"}
{"COMMAND": "MOVE_UP"}
{"COMMAND": "ROTATE_RIGHT", "DEGREES": 90}
{"COMMAND": "MOVE_RIGHT"}
{"COMMAND": "LAND"}
Make sure the Mosquitto server or any other MQTT server you might want to use for this example is running.
Launch MQTT.fx and follow all the steps explained in the previous chapter to configure a connection with TLS and TLS authentication. Then, click on the Connect button.
Click Subscribe and enter processed_commands/drone01 in the dropdown on the left-hand side of the Subscribe button. Then, click the Subscribe button. MQTT.fx will ...
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