Energy management system

An energy management system comprising

• (a) a first power measurement device comprising (1) a plug, (2) one or more power measurement module, (3) one or more AC sockets each of which is coupled with an AC switch, (4) one or more communication modules and (5) a microcontroller, wherein said microcontroller controls the AC switches;
• (b) a second power measurement device comprising a plug, a docking space and one or more detachable communication devices, wherein said detachable communication device comprises a microcontroller, one or more communication modules, charging circuitry and battery;
• and
• (c) one or more computing devices, wherein said computing device comprises a software for analyzing energy consumption measurement and providing control instructions for controlling the energy consumption of the AC sockets,
• wherein energy consumption from the AC sockets are measured by the first power measurement device and communicated to the computing devices via the communication device of the second power measurement device, wherein control instructions from the computing devices are communicated to the microcontroller in the first power measurement device via the communication device of the second power measurement device.