High consumption of electricity from air conditioning increases the potential for wasted electricity if the use of it is not controlled properly. Ability to control air conditioning is therefore a very significant subject for both the eletric power utility and consumer. In some developed countries, this is realized by a program called direct load control. However, full scale implementation of direct load control is hampered by expensive equipment needed at the consumer-side, one of which is network-connected energy metering device. This paper presents a low-cost internet-connected energy metering device capable of many types of measurements, including electrical current, voltage, power, and energy. This device is tested to work on 220 V per phase system and current range of up to 100 A per phase.