  Electricity forms the backbone of the modern world but increasing energy
demand with the growth of urban areas in recent decades has overwhelmed the
current power grid ecosystem. So, there is a need to move towards a more
efficient and interconnected smart grid infrastructure. The growing popularity
of the Internet of Things(IoT) has increased the demand for smart and connected
devices. In this work we developed a hardware device based on the ATmega2560
microcontroller that can estimate the power consumption and control the state
of electro-electronic devices interconnected to it through Bluetooth wireless
technology. The developed hardware is a smart plug focusing on smart home
applications. As a result, by using a smartphone device with Bluetooth
communication, one can control and measure electrical parameters of the
interconnected electro-electronic hardware such as the RMS (Root Mean Square)
current and RMS power been consumed. The obtained results showed the technical
viability in the construction of energy consumption measuring device using
modules and components available in the Brazilian market.
