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Practical Python Programming for IoT

You're reading from   Practical Python Programming for IoT Build advanced IoT projects using a Raspberry Pi 4, MQTT, RESTful APIs, WebSockets, and Python 3

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Product type Paperback
Published in Nov 2020
Publisher Packt
ISBN-13 9781838982461
Length 516 pages
Edition 1st Edition
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Author (1):
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Gary Smart Gary Smart
Author Profile Icon Gary Smart
Gary Smart
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Table of Contents (20) Chapters Close

Preface 1. Section 1: Programming with Python and the Raspberry Pi
2. Setting Up your Development Environment FREE CHAPTER 3. Getting Started with Python and IoT 4. Networking with RESTful APIs and Web Sockets Using Flask 5. Networking with MQTT, Python, and the Mosquitto MQTT Broker 6. Section 2: Practical Electronics for Interacting with the Physical World
7. Connecting Your Raspberry Pi to the Physical World 8. Electronics 101 for the Software Engineer 9. Section 3: IoT Playground - Practical Examples to Interact with the Physical World
10. Turning Things On and Off 11. Lights, Indicators, and Displaying Information 12. Measuring Temperature, Humidity, and Light Levels 13. Movement with Servos, Motors, and Steppers 14. Measuring Distance and Detecting Movement 15. Advanced IoT Programming Concepts - Threads, AsyncIO, and Event Loops 16. IoT Visualization and Automation Platforms 17. Tying It All Together - An IoT Christmas Tree 18. Assessments 19. Other Books You May Enjoy

Configuring, running, and using the Tree MQTT service

The Tree MQTT service program provides an MQTT interface for controlling our tree's APA102 LED strip and servo by publishing MQTT messages to MQTT topics. You can find the Tree MQTT service program in the chapter14/tree_mqtt_service folder, and it contains the following files:

  • README.md: A full list of MQTT topics and message formats for controlling your IoTree.
  • main.py: This is the program's main entry point.
  • config.py: Program configuration.
  • apa102.py: This is an exact copy of the chapter14/tree_api_service/apa102.py. file
  • servo.py: This is an exact copy of the chapter14/tree_api_service/servo.py file.
  • mqtt_listener_client.py: This is a class that connects to an MQTT broker and subscribes to a topic that will receive messages to control the APA102 and servo. When MQTT messages are received, they are turned into a PubSub message and published using the PyPubSub library, which we discussed...
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