Smart meters are an electronic device that records consumption of electric energy to allow people to monitor energy costs and consumption remotely at all times, some meters are even capable of communicating the information to the electricity supplier for monitoring and billing if the customer wishes.
Smart meters typically record energy hourly or more frequently, and can report at least daily.
Smart meters enable two-way communication between the meter and the central system such as a smart hub / gateway or directly to your portable device like a smart phone.
Wireless communication options in common use include cellular communications. WiFi, wireless ad-hoc networks over WiFi, wireless mesh networks, low power long range wireless, Z Wave and ZigBee.