---
title: "W5500 and stm32 connection circuit_[STM32+W5500] 22, W5500 failed to connect to an external server,"
url: "https://maker.wiznet.io/chen/projects/w5500-and-stm32-connection-circuit-%5Bstm32-w5500%5D-22%2C-w5500-failed-to-connect-to-an-external-server%2C/"
markdown_url: "https://maker.wiznet.io/chen/projects/w5500-and-stm32-connection-circuit-%5Bstm32-w5500%5D-22%2C-w5500-failed-to-connect-to-an-external-server%2C/md"
type: "UCC: User Created Content"
author: "理性教会"
author_url: "https://blog.csdn.net/weixin_36196164/article/details/113024345?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522166910290716782390597964%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fblog.%2522%257D&request_id=166910290716782390597964&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~blog~first_rank_ecpm_v1~times_rank-27-113024345-null-null.nonecase&utm_term=W5500&spm=1018.2226.3001.4450"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "理性教会"
original_url: "https://blog.csdn.net/weixin_36196164/article/details/113024345?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522166910290716782390597964%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fblog.%2522%257D&request_id=166910290716782390597964&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~blog~first_rank_ecpm_v1~times_rank-27-113024345-null-null.nonecase&utm_term=W5500&spm=1018.2226.3001.4450"
published: "2023-03-03"
language: "en"
likes: 3
views: 210
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source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# W5500 and stm32 connection circuit_[STM32+W5500] 22, W5500 failed to connect to an external server,

> W5500 and stm32 connection circuit_[STM32+W5500] 22, W5500 failed to connect to an external server, such as ONENET

Original author: 理性教会 (source: https://blog.csdn.net/weixin_36196164/article/details/113024345?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522166910290716782390597964%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fblog.%2522%257D&request_id=166910290716782390597964&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~blog~first_rank_ecpm_v1~times_rank-27-113024345-null-null.nonecase&utm_term=W5500&spm=1018.2226.3001.4450)

## Article

1，W5500连接外部服务器ONENET失败，主要是IP地址错误，推荐使用IP 183.230.40.34 ，端口80

![42b60d033cae5ae5d5266d7b09e0ca11.png](https://img-blog.csdnimg.cn/img_convert/42b60d033cae5ae5d5266d7b09e0ca11.png)

2，在ONENET官网上面，可以看到服务器的IP地址为 ONENET

HTTP服务器地址域名为:jjfarfapi.heclouds.com 端口号为80，

jjfarfapi.heclouds.com >> 183.230.40.34

![c603d3bbcd6b29d52daa00791cd0560f.png](https://img-blog.csdnimg.cn/img_convert/c603d3bbcd6b29d52daa00791cd0560f.png)

![dd475b41827c621dcc6f50a2a9a64283.png](https://img-blog.csdnimg.cn/img_convert/dd475b41827c621dcc6f50a2a9a64283.png)

![65a346710b18ce9fc1cc5f44e6c28f5e.png](https://img-blog.csdnimg.cn/img_convert/65a346710b18ce9fc1cc5f44e6c28f5e.png)

![2c6407af20f39382b028dc772e71c016.png](https://img-blog.csdnimg.cn/img_convert/2c6407af20f39382b028dc772e71c016.png)

3， 与平台HTTP服务器建立HTTP连接，服务器URL:api.heclouds.com 端口号:80

api.heclouds.com >> 183.230.40.33

![0c79f218e31e6801bf0f457d0728bb47.png](https://img-blog.csdnimg.cn/img_convert/0c79f218e31e6801bf0f457d0728bb47.png)

4，实际使用情况是这样的，

当ONENET的服务器IP地址为183.230.40.33 时候，HOST的URL为：strcat(pkt, "Host:jjfarfapi.heclouds.comrn");

![9f100f47019c39f4a5d0315f8c86dea5.png](https://img-blog.csdnimg.cn/img_convert/9f100f47019c39f4a5d0315f8c86dea5.png)

![b71bc29263fbbf98df95dc513079a506.png](https://img-blog.csdnimg.cn/img_convert/b71bc29263fbbf98df95dc513079a506.png)

当ONENET的服务器IP地址为183.230.40.34 时候，HOST的URL为：strcat(pkt, "Host:api.heclouds.comrn");

**相关资源：**[***W5500*全套资料_*w5500*资料-网络设备其他资源-CSDN文库**](https://download.csdn.net/download/qq_36517072/11068746?spm=1001.2101.3001.5697)

---

Source: https://maker.wiznet.io/chen/projects/w5500-and-stm32-connection-circuit-%5Bstm32-w5500%5D-22%2C-w5500-failed-to-connect-to-an-external-server%2C/