--- title: "How to add W5500 Ethernet to Raspberry Pi Pico (Python) - 2" url: "https://maker.wiznet.io/WIZnet/projects/how-to-add-w5500-ethernet-to-raspberry-pi-pico-python-2/" markdown_url: "https://maker.wiznet.io/WIZnet/projects/how-to-add-w5500-ethernet-to-raspberry-pi-pico-python-2/md" type: "UCC: User Created Content" author: "Bongjun Hur" author_url: "https://www.hackster.io/bjnhur/how-to-add-w5500-ethernet-to-raspberry-pi-pico-python-2-77c78c" editor: "WIZnet" editor_url: "https://maker.wiznet.io/" original_author: "Bongjun Hur" original_url: "https://www.hackster.io/bjnhur/how-to-add-w5500-ethernet-to-raspberry-pi-pico-python-2-77c78c" published: "2023-02-09" language: "en" hardware: ["WIZnet WIZ850io", "WIZnet W5500"] likes: 2 views: 369 comments: 0 source: "WIZnet Makers (https://maker.wiznet.io/)" --- # How to add W5500 Ethernet to Raspberry Pi Pico (Python) - 2 > Raspberry Pi Pico + WIZnet W5500 Ethernet + CircuitPython - DHCP + Echo + WebClient (html, JSON) Demo Original author: Bongjun Hur (source: https://www.hackster.io/bjnhur/how-to-add-w5500-ethernet-to-raspberry-pi-pico-python-2-77c78c) ## Components - **WIZnet WIZ850io** x 1 ([docs](https://docs.wiznet.io/Product/ioModule/WIZ850io)) - **WIZnet W5500** x 1 ([docs](https://docs.wiznet.io/Product/Chip/Ethernet/W5500)) WIZnet parts: W5500 ([Datasheet](https://docs.wiznet.io/Product/Chip/Ethernet/W5500/datasheet?utm_source=maker&utm_medium=project&utm_campaign=w5500), [product hub](https://maker.wiznet.io/products/w5500/)) ## Documents and links - [Code](https://maker.wiznet.io/_lib/download.asp?path=project/8592&downfile=pico%5Fw5500%5Fdhcp%5Fecho%2Epy) (code) ## Article ## **Story** ### **1. Preview** Need to install CircuitPython on Raspberry Pi Pico board. because we can use WIZNET5K library for W5500 Ethernet function. For more detail, I already upload 1st project with Raspberry Pi Pico, WIZ850io (W5500), Circuit Python env., Hardware connection, Ping demo example. Please visit the below project first. - ### **2. DHCP Example** visit my source repo. - Download (or fork, copy,…) samples and copy them into your Raspberry Pi Pico board. **1. copy “lib” folder into your Raspberry Pi Pico board.** 2. **open “Pico_W5500_Echo_Demo.py”** OR get the code **“Pico_W5500_DHCP_Echo”** from below code section in this project. ![Pico W5500 DHCP Demo github repo](https://hackster.imgix.net/uploads/attachments/1284474/pic114_XardEvdJVj.png?auto=compress%2Cformat&w=740&h=555&fit=max) Pico W5500 DHCP Demo github repo in the lib, I modified some codes in WIZNET5K library from Adafruit. - In adafruit_wiznet5k.py – before DHCP, check link status first. ```plaintext # in the def __init__ function start_time = time.monotonic() while True: if self.link_status or ((time.monotonic() - start_time) > 5) : break time.sleep(1) if self._debug: print("My Link is:", self.link_status) ``` - In adafruit_wiznet5k_dhcp.py – before DHCP message sending, init _BUFF byte array. ```plaintext def send_dhcp_message(self, state, time_elapsed): # before making send packet, should init _BUFF. if not, DHCP sometimes fails, wrong padding, garbage bytes, ... for i in range(len(_BUFF)): _BUFF[i] = 0 ``` Latest code, you can download from - or - (fork version) 3. copy all contents into “code.py” on your Pico board. ![copy lib and edit code.py from Pico_W5500_DHCP_Echo demo code](https://hackster.imgix.net/uploads/attachments/1284496/pic115_Qz9w7lFidY.png?auto=compress%2Cformat&w=740&h=555&fit=max) copy lib and edit code.py from Pico_W5500_DHCP_Echo demo code 4. save “code.py” and open REPL. ### **3. DHCP processing** my REPL console window log: ![DHCP start](https://hackster.imgix.net/uploads/attachments/1284501/pic116_SRCIiCn3Nc.png?auto=compress%2Cformat&w=740&h=555&fit=max) DHCP start DHCP process is ok. ![DHCP Done and listen socket](https://hackster.imgix.net/uploads/attachments/1284503/pic117_Aa7Tx1RmwW.png?auto=compress%2Cformat&w=740&h=555&fit=max) DHCP Done and listen socket ```plaintext ``` tcp server socket is also opened. ### **4. ECHO Demo** First I try to ping to the board. no problem. ![ping command](https://hackster.imgix.net/uploads/attachments/1284507/pic118_lBVjKZH4Vb.png?auto=compress%2Cformat&w=740&h=555&fit=max) ping command Second, I tried to TCP connect to (as described on our python code) – I used “Hercules” freeware tool for socket test. - Destination IP – [192.168.0.20](http://192.168.0.20/) - Port – 50007 - Send data – “12345” ![TCP Echo Demo result](https://hackster.imgix.net/uploads/attachments/1284509/pic119_0q4jDXqHXH.png?auto=compress%2Cformat&w=740&h=555&fit=max) 1 / 2 • TCP Echo Demo result ### **5. WebClient Demo** You can find WebClient Demo easily from Adafruit WIZNET5K Ethernet library. Let’s try this sample code as well. It’s easy. **Powerful CircuitPython!!** original example, visit I also prepared “Pico_W5500_WebClient_Demo.py” on my repo. - - or can copy code from “Pico_W5500_WebClient_Demo” in below code section **Just copy this code (or download, rename, copy) into “code.py” on your Raspberry Pi Pico board,** then save. Done! you can see the result log in your REPL console window as below. ![Raspberry Pi Pico W5500 Ethernet WebClient Demo result](https://hackster.imgix.net/uploads/attachments/1284523/pic122_RdEWcXxMBB.png?auto=compress%2Cformat&w=740&h=555&fit=max) Raspberry Pi Pico W5500 Ethernet WebClient Demo result 1. IP lookup [adafruit.com](http://adafruit.com/) result 2. Getting page from “http://wifitest.adafruit.com/testwifi/index.html” 3. Getting JSON data from “http://api.coindesk.com/v1/bpi/currentprice/USD.json” *) Check again! This example, you need **“adafruit_requests.mpy”** file in lib folder. ![adafruit_requests.mpy location](https://hackster.imgix.net/uploads/attachments/1284524/pic104_l5PtddwJ65.png?auto=compress%2Cformat&w=740&h=555&fit=max) adafruit_requests.mpy location ### **Resource** All code, you can find the below repo. - Happy coding! ![Good V!](https://hackster.imgix.net/uploads/attachments/1284529/20210412_213416_wfAu8MDTpY.jpg?auto=compress%2Cformat&w=740&h=555&fit=max) Good V! ## **Schematics** ### **Pico_WIZ850io** ![](https://hackster.imgix.net/uploads/attachments/1284476/pic110_i0vOja2PT2.png) --- Source: https://maker.wiznet.io/WIZnet/projects/how-to-add-w5500-ethernet-to-raspberry-pi-pico-python-2/