Device – Device = Zigbee
Device – App or Hub = WIFI
Smartthings is a hub where different devices will send data to through the Wi-Fi network, and into the hub. The hub is usually connected straight to the router, and the hub will send simple data to an app. We can use this for our fire sensors.
Zigbee is a protocol which helps devices talk or communicate to other devices and creates the IoT network. The module is the chip which connects the two devices.
For example, if you want to set a morning bulb light mood, the Zigbee module is built into all the bulbs and the bulbs will communicate to each other to set the perfect warm light for your morning.
We can set these two up so that in a lawn fire, first the Zigbee network sends the message to the sprinkler, and the sprinklers immediately turn on. Then, the WIFI network will send the warning to the application, and the user can take control. This way the lawn is already protected and it will stop burning further.