---
title: "Air105 RT Thread with W5500"
url: "https://maker.wiznet.io/viktor/projects/air105-rt-thread-with-w5500/"
markdown_url: "https://maker.wiznet.io/viktor/projects/air105-rt-thread-with-w5500/md"
type: "UCC: User Created Content"
author: "HEYAHONG"
author_url: "https://github.com/HEYAHONG/Air105RTThreadDemo"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "HEYAHONG"
original_url: "https://github.com/HEYAHONG/Air105RTThreadDemo"
published: "2023-06-09"
language: "en"
likes: 0
views: 253
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Air105 RT Thread with W5500

> This is an example of using rt-thread to develop Air105 (for testing only).

Original author: HEYAHONG (source: https://github.com/HEYAHONG/Air105RTThreadDemo)

## Article

Air105 itself does not support Ethernet, but can use W5500 as a full hardware Ethernet stack. Occupies SPI2 (4 pins) by default:

| Air105 pin | Function |
| --- | --- |
| PB4/GPIO20 | SPI2_MOSI |
| PB3/GPIO19 | SPI2_CSN |
| PB2/GPIO18 | SPI2_CLK |
| PB5/GPIO21 | SPI2_MISO |

Note: W5500 has extremely high requirements on power supply and needs to support a large instantaneous current. Unstable power supply will lead to unstable operation of Air105.

---

Source: https://maker.wiznet.io/viktor/projects/air105-rt-thread-with-w5500/