Delayed Lock WiFi Plugin (de.j4velin.delayedlock.plugins.wifi2) on Google Play
This is just a plugin and requires the 'Delayed Lock' app version 2.0.8 or newer to run!!This is a plugin for Delayed Lock which automatically disables the pattern, PIN or password lockscreen when connected to a specific Wifi network so you don't have to unlock the security lockscreens while your device is at home or at work.This plugin can also automatically disable the wifi radio on your device when you're not connected to any wifi network to save battery.If there is no wifi network at the desired location, you should take a look at the "Delayed Lock location plugin" which disables the lock depending on your current location (using cell network).Pleas note that for security reasons the app won't automatically unlock the device if it's near your wifi network. You need to unlock it manually once, then it will stay unlocked as long as you're connected.