ESP8266 takes long time to connect

Question

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 ?

Answer 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.