Wireless communications is excellent for the Internet of Things (IoT). Communicating with things using your network, via the Internet, can be done is many different ways.
Sort Range, private, no service fees:
WiFi modems to wireless network connect a thing to a network.
Bluetooth modem to send data to/from something that is close to another device that is connected to a network.
Nation wide, public, with service fees:
Cellular modem to connect a device to a public cellular network, and then route the data to a network or the Internet.
Long Range, private, Free:
Narrow Band Data Radios connect to something, and communicate to a private network or Internet using terminal servers or gateways.