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Pure-Python interface for WIZNET 5k ethernet modules.


This driver depends on:

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle.

Installing from PyPI

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI. To install for current user:

pip3 install adafruit-circuitpython-wiznet5k

To install system-wide (this may be required in some cases):

sudo pip3 install adafruit-circuitpython-wiznet5k

To install in a virtual environment in your current project:

mkdir project-name && cd project-name
python3 -m venv .venv
source .venv/bin/activate
pip3 install adafruit-circuitpython-wiznet5k

Usage Example

This example demonstrates making a HTTP GET request to

import board
import busio
import digitalio
import adafruit_connection_manager
import adafruit_requests
from adafruit_wiznet5k.adafruit_wiznet5k import WIZNET5K

print("Wiznet5k WebClient Test")


cs = digitalio.DigitalInOut(board.D10)
spi_bus = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)

# Initialize ethernet interface with DHCP
eth = WIZNET5K(spi_bus, cs)

# Initialize a requests session
pool = adafruit_connection_manager.get_radio_socketpool(eth)
ssl_context = adafruit_connection_manager.get_radio_ssl_context(eth)
requests = adafruit_requests.Session(pool, ssl_context)

print("Chip Version:", eth.chip)
print("MAC Address:", [hex(i) for i in eth.mac_address])
print("My IP address is:", eth.pretty_ip(eth.ip_address))
print("IP lookup %s" %eth.pretty_ip(eth.get_host_by_name("")))

#eth._debug = True
print("Fetching text from", TEXT_URL)
r = requests.get(TEXT_URL)

print("Fetching json from", JSON_URL)
r = requests.get(JSON_URL)


This example demonstrates a simple web server that allows setting the Neopixel color.

import board
import busio
import digitalio
import neopixel

from adafruit_wiznet5k.adafruit_wiznet5k import WIZNET5K
import adafruit_wiznet5k.adafruit_wiznet5k_wsgiserver as server
from adafruit_wsgi.wsgi_app import WSGIApp

print("Wiznet5k Web Server Test")

# Status LED
led = neopixel.NeoPixel(board.NEOPIXEL, 1)
led.brightness = 0.3
led[0] = (0, 0, 255)

# W5500 connections
cs = digitalio.DigitalInOut(board.D10)
spi_bus = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)

# Initialize Ethernet interface with DHCP
eth = WIZNET5K(spi_bus, cs)

# Here we create our application, registering the
# following functions to be called on specific HTTP GET requests routes

web_app = WSGIApp()

def led_on(request, r, g, b):
    print("LED handler")
    led.fill((int(r), int(g), int(b)))
    return ("200 OK", [], ["LED set!"])

def root(request):
    print("Root handler")
    return ("200 OK", [], ["Root document"])

def large(request):
    print("Large pattern handler")
    return ("200 OK", [], ["*-.-" * 2000])

# Here we setup our server, passing in our web_app as the application
wsgiServer = server.WSGIServer(80, application=web_app)

print("Open this IP in your browser: ", eth.pretty_ip(eth.ip_address))

# Start the server
while True:
    # Our main loop where we have the server poll for incoming requests
    # Maintain DHCP lease
    # Could do any other background tasks here, like reading sensors


API documentation for this library can be found on Read the Docs.

For information on building library documentation, please check out this guide.


Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.


This library was written by Arduino LLC. We’ve converted it to work with CircuitPython and made changes so it works similarly to CircuitPython’s WIZNET5k wrapper for the WIZnet 5500 Ethernet interface and CPython’s Socket low-level networking interface module.

This open source code is licensed under the LGPL license (see LICENSE for details).

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