The star IOT network takes the LTE  gateway as the central node. The temperature&humidity sensor, gas sensor, motion detection sensor and door status sensor are all directly connected with the LTE gateway. The sensor end can transmit the collected temperature and humidity, gas concentration, motion state and other data to the gateway end in real time. The transmission distance can reach up to 2km, and the gateway end and the sensor end can automatically connect. Connect, two-way communication.