I am trying to implement dns_gethostbyname() to check if my ESP32 is really connected with the internet or not. If connected, we then only try to connect to our AWS server.
Every time there is internet, I get success statement from the below code
[Codebox]
void dns_found_cb(const char *name, const ip_addr_t *ipaddr, void *callback_arg)
{
// ip_Addr = ipaddr;
if(ipaddr != NULL)
{
ip_addr_t resolved_ip = *ipaddr;
printf("ADDRESS : %u\n", resolved_ip.addr);
printf("dns_found_cb SUCCESS \n");
}
else
{
printf("dns_found_cb FAIL\n");
}
dns_clear_cache();
xEventGroupSetBits(dns_event, 1<<0);
}[/Codebox]
But when I remove the internet while esp32 is connected to the wifi ssid, it still gives success for some time before reaching to the *FAIL* state due to which we are unable to implement the feature.
What can be the possible solution for this?
dns_gethostbyname
-
- Posts: 11
- Joined: Thu Jul 14, 2022 5:07 am
Jump to
- English Forum
- Explore
- News
- General Discussion
- FAQ
- Documentation
- Documentation
- Sample Code
- Discussion Forum
- Hardware
- ESP-IDF
- ESP-BOX
- ESP-ADF
- ESP-MDF
- ESP-WHO
- ESP-SkaiNet
- ESP32 Arduino
- IDEs for ESP-IDF
- ESP-AT
- ESP IoT Solution
- ESP RainMaker
- Rust
- ESP8266
- Report Bugs
- Showcase
- Chinese Forum 中文社区
- 活动区
- 乐鑫活动专区
- 讨论区
- 全国大学生物联网设计竞赛乐鑫答疑专区
- ESP-IDF 中文讨论版
- 《ESP32-C3 物联网工程开发实战》书籍讨论版
- 中文文档讨论版
- ESP-AT 中文讨论版
- ESP-BOX 中文讨论版
- ESP IoT Solution 中文讨论版
- ESP-ADF 中文讨论版
- ESP Mesh 中文讨论版
- ESP Cloud 中文讨论版
- ESP-WHO 中文讨论版
- ESP-SkaiNet 中文讨论版
- ESP 生产支持讨论版
- 硬件问题讨论
- 项目展示
Who is online
Users browsing this forum: MicroController and 231 guests
- All times are UTC
- Top
- Delete cookies
About Us
Espressif Systems is a fabless semiconductor company providing cutting-edge low power WiFi SoCs and wireless solutions for wireless communications and Internet of Things applications. ESP8266EX and ESP32 are some of our products.