What is the gateway using for?

Gateway is design for the devices that run in Zigbee, which is basically used for communication with imt’s Zigbee devices, include sensor, smart door lock, smart curtain. It received the Zigbee signal and transmission to the router, router send the massage to phone. Zigbee is a low-power consumption & low data rate (on/ off). Compare with Wifi, Wifi transfer data (film, img, song) more than Zigbee.