How to setup MQTT for Raspberry Pi and ESP32 for IOT and Robotics projects
3 min read
4 months ago
Published on May 08, 2024
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Table of Contents
Tutorial: Setting up MQTT for Raspberry Pi and ESP32 for IoT and Robotics Projects
Step 1: Introduction to MQTT
- MQTT is a popular protocol used for devices like Raspberry Pi and ESP32 to exchange data seamlessly.
- Learning MQTT implementation is essential for IoT and robotics projects.
- In this tutorial, we will set up MQTT for a Raspberry Pi and two ESP32 microcontrollers to publish and subscribe sample information on an MQTT network.
Step 2: Demo Setup
- Set up a demo with a Raspberry Pi and two ESP32 microcontrollers.
- The client programs on these devices will publish and subscribe sample information using three topics on the MQTT network.
Step 3: Installation and Setup
- Install MQTT on your Raspberry Pi using the provided commands.
- Check the status of the MQTT broker to ensure it is active.
Step 4: Running the Client Programs
- Run the client Python scripts on the devices.
- One script connects to the broker and waits for data, while the other script publishes sample data every two seconds.
Step 5: Handling Data
- Modify the callback functions in the scripts to handle incoming data on the specified topics.
- Customize the data handling logic as per your requirements.
Step 6: Monitoring Data Flow
- Monitor the data flow on the serial monitor to ensure successful connections and data exchange between the devices.
Step 7: Testing the Setup
- Verify that data is being published and received between the Raspberry Pi and ESP32 devices.
- Ensure that all components of the setup are functioning correctly.
Step 8: System Resilience
- Note that if the MQTT broker is stopped, all client connections will be disconnected.
- Upon restarting the broker, the clients will automatically reconnect without manual intervention, and data flow will resume.
Step 9: Device Resilience
- Understand that if any device loses power or gets temporarily disconnected, it will resume its role upon reconnection.
- Configure unique names for each device when connecting to the MQTT broker to avoid conflicts.
Step 10: Scalability
- Consider the scalability of the setup by creating a network of devices reporting sensor data to a central location and receiving control directions from a master device.
Step 11: Additional Resources
- Access the source code and written guide for this project in the video description.
- Explore more projects on robotics and IoT on the provided website.
Step 12: Conclusion
- Enjoy setting up MQTT for your Raspberry Pi and ESP32 devices for IoT and robotics projects.
- Stay tuned for more informative videos on similar topics. Thank you for watching!