ESP8266 Not Connecting To WiFi: 7 Ways To Fix

esp8266 not connecting to wifi
esp8266 not connecting to wifi

The Internet has become a crucial part of every home and office (even shops, for that matter). However, the internet is not that simple since it involves Wi-Fi microchips. ESP8266 is one such Wi-Fi microchip with microcontroller features and a TCP/IP stack.

It is produced by Espressif Systems in China. On the contrary, ESP8266 not connecting to Wi-Fi is a common issue. So, let’s see the solutions!

ESP8266 Not Connecting To WiFi

1) Space Issue

You might not believe this, but Wi-Fi routers have the storage. That being said, if there is a space issue with the router, it will restrict the Wi-Fi functionality and connection. You can access the router settings to clear up space if needed.


In case there are gaps in the Wi-Fi SSID, it can lead to Wi-Fi connectivity issues. For this reason, we suggest that you change the Wi-Fi SSID. While changing the SSID, you have to make sure that there are no spaces in the SSID so the Wi-Fi connectivity is resolved.

3) Wi-Fi Frequency

Wi-Fi frequency plays a direct role in optimizing the Wi-Fi connection. If you are still struggling with Wi-Fi connectivity issues, we suggest checking the Wi-Fi frequency. That being said if Wi-Fi frequency is set to 5GHz channel. Keep in mind that ESP8266 doesn’t work on the 2.4GHz channel, so tweak those settings, and you will be able to connect to Wi-Fi.

4) Availability Of Channel

When it comes down to ESP8266, you have to understand that channel availability and visibility. We are saying this because if the Wi-Fi AP is running on channel 13 or channel 14, ESP8266 will not be able to see it. That being said, change the channels (you can use any channel other than channel 13 or channel 14), and it will streamline Wi-Fi connectivity. It’s best to choose the automatic setting!

5) Configuration

Wi-Fi routers are way more complicated than you can imagine. If ESP8266 is still not connecting to Wi-Fi, you have to check and change the router or modem configuration. So, choose the 802.11G+N option in the operation mode. Once the operation mode is changed, you tweak the automatic channel configuration as well. Generally, opting for 11 to automatic or 20 to automatic will do a fine job.

6) Hostname Settings

While using ESP8266, you’ve to understand the importance of hostname settings. With this microchip, you will get SSID and password just like other Wi-Fi connections. However, you’ve to tweak the settings by adding ESP-host before the Wi-Fi SSID. So, try this tip and try connecting to Wi-Fi again.

7) Wi-Fi Connection

If the ESP8266 still won’t connect to a Wi-Fi connection, there might be something wrong with the Wi-Fi connection itself. In case you are suspecting a Wi-Fi connection issue, you could opt for a router reboot. That’s to say because the reboot is a suitable way of refreshing the Wi-Fi signals, and ESP8266 will have better chances of connecting to Wi-Fi.

These steps should fix the Wi-Fi connection issue with ESP8266. On the contrary, you can always call Espressif Systems for better assistance because the microchip might need a replacement!

5 thoughts on “ESP8266 Not Connecting To WiFi: 7 Ways To Fix”

  1. 8 Disable the 5GHz band in the router.
    I don’t know why, but on two different routers, if 5GHz is enabled, then esp8266 cannot connect to its 2.4GHz .. Despite the fact that the ssid is different for 5GHz and 2.4GHz networks

  2. esptool FatalError: Failed to connect to ESP8266: Timed out waiting for packet header

    How can we resolve this . Any one please explain!!

  3. You are wrong about the frequency band supported by the ESP8266 – it works in the 2.4GHz band, not the 5GHZ band. Please correct this!

  4. Hi,

    I have few ESP8266 based Arduino boards (Weemos/LOLIN D1 Mini). I experienced
    these boards likely will not connect to my TP-LINK AX20/AX1800 WiFi-6 capable
    home router. While they were connecting without any problems to a TP-Link
    Archer C80 (non Wifi-6 capable) device.

    On the AX/AX1800 by default my wireless 2.4 was set to use 802.11/b/g/n/ax.
    After changing it to 802.11/b/g/n mixed the problem seems to be solved.


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