'ESP8266 takes long time to connect

I am using an ESP8266 for a project which requires the ESP to establish a connection to the Access Point , with as less delay as possible, but as of now it takes a minimum of 4-5 mins for establishing the connection which is too much delay. I have tried to set a static ip, gateway, subnet and DNS by passing them as parameter to WiFi.config() function, still no success. Would someone help me regarding this issue ?

arduinoesp8266arduino-esp8266


Solution 1:[1]

I have seen lengthy delays on ESP8266 WiFi connection if the WiFi is persisting its configuration to the flash memory. Anywhere from a few seconds to a minute or so. Try to call WiFi.persistent( false ) before you call WiFi.mode() and WiFi.begin().

At the very least, that will help you narrow down the cause of the problem.

Solution 2:[2]

Ensure access point frequency is 2.4Ghz (not 5Ghz). This will cause prolonged connection time (never connecting).

"The ESP8266 is not designed for 5 GHz." Source

NodeMCU V1.0 (as pictured) uses an ESP8266's (ESP-12E) chip, Antenna is configured for 2.4 Ghz only. enter image description here

Solution 3:[3]

I think the library <ESP8266WiFi.h> you are using have problems, you can use older versions of it.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Erik HB
Solution 2
Solution 3 hung le

Related Questions