The automation center recognizes voice commands and uses low-power, relatively cheap ZigBee RF wireless communication modules. The home automation system is designed to control all lights and electrical appliances in a home or office using voice commands.
The zigbee can receive the voice and send the voice data to the ARM9 controller and then the controller converts the voice into the required format and then resends the data through the zigbee to the other zigbee and to the microcontroller where the devices are connected. Based on the message you received, you enable or disable the devices.