A method according to one embodiment includes establishing, by Bluetooth Low Energy (BLE) circuitry of an access control device, a BLE communication connection with a first mobile device while a main microprocessor and a Wi-Fi circuitry of the access control device are in sleep states; waking, by the access control device, the Wi-Fi circuitry of the access control device from the sleep state in response to establishing the BLE communication connection with the mobile device; establishing, by the Wi-Fi circuitry of the access control device, a Wi-Fi communication connection with an access control server in response to waking the Wi-Fi circuitry from the sleep state; and receiving, by the access control device and from the access control server via the Wi-Fi communication connection, access control data for the access control device transmitted from a second mobile device to the access control server.