Скачать или смотреть How to Receive POST Data from NodeMCU to Django Framework

Learn how to effectively receive and handle `POST data` from NodeMCU to your Django application using simple steps and code examples.
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This video is based on the question https://stackoverflow.com/q/65227609/ asked by the user 'Khel Parian' ( https://stackoverflow.com/u/13498391/ ) and on the answer https://stackoverflow.com/a/65227732/ provided by the user 'Eddwin Paz' ( https://stackoverflow.com/u/3061689/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

Are you working on a project that involves sending HTTP POST data from a NodeMCU ESP8266 to a Django web application? If so, you might be feeling overwhelmed, especially if you're new to the Django framework. In this guide, we will walk you through the steps required to receive and display the POST data containing a string ID of an RFID card in your Django app.

Understanding the Problem

In your setup, the NodeMCU reads an RFID card and sends its unique ID to a Django web application via a POST request. However, you might be wondering how to effectively handle this POST data within your Django views and render it dynamically in a template. Let's break down the solution step by step.

Solution Steps

Step 1: Create a Django Form

To begin, you will need to create a form that accepts the UID result from the NodeMCU. This involves creating a new file named forms.py in your Django app directory.

Code for forms.py

[[See Video to Reveal this Text or Code Snippet]]

Explanation

Here, we define a SaveForm class using Django’s forms module, which will handle the data being sent via POST requests. The UIDresult field will store the RFID ID sent from the NodeMCU.

Step 2: Modify Views Logic

Now, we need to modify your existing views.py file to correctly handle the incoming POST request and use the form we just created.

Updated Code for views.py

[[See Video to Reveal this Text or Code Snippet]]

Explanation

Imports: Import the form and necessary modules.

CSRF exemption: We use @ csrf_exempt to bypass CSRF validation, which is handy for testing with NodeMCU, but make sure to address CSRF in production environments.

Form validation: The view checks whether the request method is POST and whether the form is valid — upon success, it retrieves the RFID ID from the cleaned data and passes it to the template context.

Step 3: Update the Template

Ensure that your template is set to correctly display the UID that is passed from the view.

Code for templates/card_reg.html

[[See Video to Reveal this Text or Code Snippet]]

Explanation

In this template, we use Django's templating language to render the UID received from the view in a textarea. Make sure the placeholder instructions are clear for user interaction.

Conclusion

By following these steps, you can successfully receive POST data from a NodeMCU ESP8266 in your Django application and display it on the frontend. Remember to test your integration thoroughly and ensure that the connection between the NodeMCU and the Django server is established correctly. With these concepts, you'll be able to extend your project even further!

Feel free to reach out if you have any questions or need further assistance. Happy coding!