The electrical energy we need in every aspect of our lives must be used efficiently in order to be sustainable in the face of the limited energy resources and the continuous increase in the demand for energy. One of the ways to use energy efficiently is to control the energy continuously with smart meters. Smart electricity meters are intelligent measuring devices that measure the electrical values of the connected electrical grid, generate billing based on measurement evaluations, and enable remote monitoring and control (switching on/off) of energy through communication technologies. In this study, the design of a single-phase smart electricity meter was carried out in software and hardware and tested in a laboratory environment. The energy measurements taken with the STM32F103 microcontroller used in the design were transferred via both Wi-Fi and LoRa RF communication. In addition, the mobile application interface has been developed and all consumption data is presented to consumers via mobile phones. According to the results of the experimental studies, it has been observed that the measurement accuracy of the device is greater than 99%. In addition, it has been shown that electricity meters can also be used as modems for the installation of LoRa RF communication infrastructure within the scope of the Project.