Mastering MicroPython's `upip` on ESP8266

The ESP8266 is a low - cost Wi - Fi microcontroller that has gained significant popularity in the Internet of Things (IoT) space. MicroPython, a lean and efficient implementation of the Python 3 programming language, brings the power and simplicity of Python to microcontrollers like the ESP8266. upip is MicroPython's package manager, similar to pip in standard Python. It allows users to easily install and manage Python libraries on MicroPython - enabled devices such as the ESP8266. This blog post will guide you through the fundamental concepts, usage methods, common practices, and best practices of using upip on the ESP8266.

Table of Contents#

  1. Fundamental Concepts
  2. Setting Up the Environment
  3. Usage Methods
  4. Common Practices
  5. Best Practices
  6. Conclusion
  7. References

Fundamental Concepts#

MicroPython#

MicroPython is a lightweight version of Python that is designed to run on microcontrollers. It provides a high - level programming interface, making it easy for developers to write code for embedded systems. MicroPython includes a standard library and can be extended with third - party libraries.

ESP8266#

The ESP8266 is a highly integrated chip designed for the IoT. It has a built - in Wi - Fi module, which allows it to connect to the internet. With MicroPython flashed on the ESP8266, you can use Python code to interact with its hardware components and perform various IoT tasks.

upip#

upip is MicroPython's package manager. It allows you to search for, install, and manage Python packages directly on the MicroPython device. It uses the Python Package Index (PyPI) as its package source and can install pure - Python packages.

Setting Up the Environment#

Flashing MicroPython on ESP8266#

  1. Download the MicroPython firmware: Visit the official MicroPython website and download the latest firmware for the ESP8266.
  2. Install esptool: You can install esptool using pip if you haven't already.
pip install esptool
  1. Flash the firmware: Connect your ESP8266 to your computer via USB. Use the following command to flash the firmware (replace /dev/ttyUSB0 with the actual serial port of your ESP8266).
esptool.py --port /dev/ttyUSB0 erase_flash
esptool.py --port /dev/ttyUSB0 --baud 460800 write_flash --flash_size=detect 0 esp8266-20230426-v1.20.0.bin

Connecting to the ESP8266#

You can use a serial terminal emulator like PuTTY (on Windows) or screen (on Linux) to connect to the ESP8266. Open the terminal and connect to the serial port of the ESP8266 at a baud rate of 115200.

Connecting to Wi - Fi#

Once connected to the ESP8266, you need to connect it to a Wi - Fi network. Here is a simple Python code example:

import network
 
# Create a station interface
sta_if = network.WLAN(network.STA_IF)
if not sta_if.isconnected():
    print('Connecting to network...')
    sta_if.active(True)
    sta_if.connect('your_wifi_ssid', 'your_wifi_password')
    while not sta_if.isconnected():
        pass
print('Network config:', sta_if.ifconfig())

Usage Methods#

Installing a Package#

To install a package using upip, you first need to import it in your MicroPython code. Here is an example of installing the urequests package:

import upip
upip.install('urequests')

Listing Installed Packages#

You can list all the installed packages using the following code:

import pkg_resources
for dist in pkg_resources.working_set:
    print(dist)

Uninstalling a Package#

Currently, upip does not have a built - in uninstall feature. To uninstall a package, you need to manually delete the package directory from the device's file system.

Common Practices#

Error Handling#

When using upip to install packages, errors can occur due to network issues or package availability. You should add error handling in your code. For example:

import upip
try:
    upip.install('urequests')
    print('Package installed successfully')
except Exception as e:
    print('Error installing package:', e)

Using Installed Packages#

After installing a package, you can use it in your code. Here is an example of using the urequests package to make an HTTP GET request:

import urequests
 
response = urequests.get('http://example.com')
print(response.text)
response.close()

Best Practices#

Managing Storage Space#

The ESP8266 has limited storage space. Therefore, you should only install the packages that you really need. Also, avoid installing large packages that may consume a significant amount of storage.

Updating Packages#

Although upip does not have a built - in update feature, you can uninstall and then reinstall a package to get the latest version.

Testing Packages Locally#

Before deploying your code with installed packages on the ESP8266, it is a good practice to test the packages on a more powerful device (e.g., a Raspberry Pi) running MicroPython. This can help you identify and fix any issues early.

Conclusion#

upip is a powerful tool that enhances the functionality of MicroPython on the ESP8266. It allows you to easily install and manage Python packages, which can significantly speed up your development process. By following the concepts, usage methods, common practices, and best practices outlined in this blog post, you can effectively use upip on the ESP8266 to build your IoT applications.

References#

2025-10