マイクロPython urequests の使い方を解説！

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micropython urequests

Introduction

In this tutorial, we will learn how to use the urequests module in MicroPython to make HTTP requests, such as GET and POST, to interact with web servers. We will cover the installation of the urequests module, the basics of making HTTP requests, and provide detailed, step by step sample codes for each functionality.

Prerequisites

Before we begin, make sure you have the following:

• MicroPython installed on your device.
• Basic understanding of MicroPython and HTTP requests.

Installation

To use the urequests module, you need to install it on your MicroPython device. Follow these steps:

1. Open the MicroPython REPL.
2. Use the upip module to install urequests by running the command: import upip and then upip.install("micropython-urequests").
3. Wait for the installation to complete.

Making GET Requests

To make a GET request using urequests, follow these steps:

1. Import the urequests module:

import urequests

2. Define the URL you want to request:

url = "https://api.example.com/data"

3. Send the GET request:

response = urequests.get(url)

4. Check the response status code to ensure the request was successful:

if response.status_code == 200:
    print("Request successful!")

5. Print the response content:

print(response.text)

Making POST Requests

To make a POST request using urequests, follow these steps:

1. Import the urequests module:

import urequests

2. Define the URL you want to request:

url = "https://api.example.com/data"

3. Define the data payload to send with the request:

data = {"key1": "value1", "key2": "value2"}

4. Send the POST request:

response = urequests.post(url, json=data)

5. Check the response status code to ensure the request was successful:

if response.status_code == 200:
    print("Request successful!")

6. Print the response content:

print(response.text)

Handling Headers

You can also include custom headers in your requests. To do this, pass a dictionary of headers to the headers parameter of the request function. Here’s an example:

import urequests

url = "https://api.example.com/data"
headers = {"Content-Type": "application/json"}

response = urequests.get(url, headers=headers)

Conclusion

In this tutorial, we have learned how to make HTTP requests using the urequests module in MicroPython. We covered the basics of making GET and POST requests, handling response codes, and including custom headers. With the detailed, step by step sample codes provided, you should now be able to apply this knowledge to your own projects using MicroPython. Happy coding!