App FunctionsApp unlocking via BluetoothAdd PIN code on the AppOpen the Easy Key Plus App, enter the homepage of the door lock, tap on "Access"Choose PIN code and tap on "Add a PIN code" Enter the PIN code twice then, tap on "Next" to finish adding. Add the periodic PIN codeOpen the Easy Key Plus App, enter the homepage of the door lock, tap on "Access"Choose "Fine-grained password", then tap on "Periodic PIN code" Tap on "Add"Enter the new periodic PIN code, choose the start & end time and validity period then tap on next