The Zigbee home automation system receives these messages from the sensors and processes them. It understands the information provided by the sensors and can take appropriate actions based on that information. For example, if the motion sensor detects movement in a room, the Zigbee system might turn on the lights in that room automatically.
In summary, sensors in a Zigbee home automation system collect information about the environment, such as motion, temperature, or the status of doors/windows. They send this information wirelessly using Zigbee technology to the central Zigbee system, which then processes the information and controls various devices or appliances in your home accordingly. This allows you to automate different aspects of your home and make it more convenient and efficient.