--- title: "Mongoose library RP2040-W5500 example" url: "https://maker.wiznet.io/viktor/projects/mongoose-library-rp2040-w5500-example/" markdown_url: "https://maker.wiznet.io/viktor/projects/mongoose-library-rp2040-w5500-example/md" type: "UCC: User Created Content" author: "Cesanta Software" author_url: "https://github.com/cesanta/mongoose/tree/master/examples/rp2040/pico-w5500" editor: "WIZnet" editor_url: "https://maker.wiznet.io/" original_author: "Cesanta Software" original_url: "https://github.com/cesanta/mongoose/tree/master/examples/rp2040/pico-w5500" published: "2023-01-03" language: "en" hardware: ["WIZnet W5500", "Raspberry Pi RP2040"] likes: 6 views: 6093 comments: 2 source: "WIZnet Makers (https://maker.wiznet.io/)" --- # Mongoose library RP2040-W5500 example > Mongoose library RP2040-W5500 example Original author: Cesanta Software (source: https://github.com/cesanta/mongoose/tree/master/examples/rp2040/pico-w5500) ## Components - **WIZnet W5500** x 1 ([docs](https://docs.wiznet.io/Product/Chip/Ethernet/W5500)) - **Raspberry Pi RP2040** x 1 ([docs](https://www.raspberrypi.com/documentation/microcontrollers/rp2040.html)) 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/)) ## Article ## RP2040 with W5500 Ethernet module This repository demonstrates how to use RP2040 with W5500 Ethernet module, to implement networking. In this example, a very simple HTTP server is implemented. See [other examples](https://github.com/cesanta/mongoose/blob/master/examples) for more functionality. ## RP2040 Pico wiring The W5500 module uses SPI for communication. The following pins are used by this example (modify `main.c` if you use a different pinout): ``` enum { LED = 25, SPI_CS = 17, SPI_CLK = 18, SPI_TX = 19, SPI_RX = 16 }; ``` On a breadboard, it might look like this: [![](https://github.com/cesanta/mongoose/raw/master/examples/rp2040/pico-w5500/images/wiring.png)](https://github.com/cesanta/mongoose/blob/master/examples/rp2040/pico-w5500/images/wiring.png) ## Pinout reference [![](https://github.com/cesanta/mongoose/raw/master/examples/rp2040/pico-w5500/images/pinout.png)](https://github.com/cesanta/mongoose/blob/master/examples/rp2040/pico-w5500/images/pinout.png) ## Build and run Clone Mongoose repo, go to this example, and build it: ``` git clone https://github.com/cesanta/mongoose cd mongoose/examples/ro2040/pico-w5500 make ``` The above will make a firmware in `build/example.uf2`. Reboot your Pico board in bootloader mode, and copy `example.uf2` to the RPI disk. Attach serial console. Then, plug in Ethernet cable: ```plaintext $ cu -l /dev/cu.usb* -s 115200 4653 2 main.c:79:main Ethernet: down 520b 2 main.c:79:main Ethernet: down 5dc3 2 main.c:79:main Ethernet: down 6593 1 mongoose.c:6757:onstatechange Link up 659a 3 mongoose.c:6840:tx_dhcp_discover DHCP discover sent 667b 3 mongoose.c:6723:arp_cache_add ARP cache: added 192.168.0.1 @ 90:5c:44:55:19:8b 667d 2 mongoose.c:6749:onstatechange READY, IP: 192.168.0.24 667e 2 mongoose.c:6750:onstatechange GW: 192.168.0.1 6680 2 mongoose.c:6752:onstatechange Lease: 86062 sec 697b 2 main.c:79:main Ethernet: up 7533 2 main.c:79:main Ethernet: up ``` Note the aquired IP address printed. Run a browser, and type that IP address in the address field. You should see an "ok" message in a browser: [![](https://github.com/cesanta/mongoose/raw/master/examples/rp2040/pico-w5500/images/browser.png)](https://github.com/cesanta/mongoose/blob/master/examples/rp2040/pico-w5500/images/browser.png) --- Source: https://maker.wiznet.io/viktor/projects/mongoose-library-rp2040-w5500-example/