Both electricity company as well as user get their energy meter readings via sms every month. User may also control the system using sms.
The energy meter is interfaced to a microcontroller of 8051 family. The energy meter readings are also read by the micontroller and displayed on an LCD Screen, this data is also sent via sms through a gsm modem interfaced to the microcontroller.
The Gsm modem also has sms receiving capability. On receiving particular user request it sends required signal to the microcontroller in order to do counting for required operation. It can switch loads On/Off as desired.