The board can be used to develop a single-phase power / energy meter with tamper detection based on ST7FLITE. It measures active power, voltage, current, power factor and line frequency in a single-phase distribution environment and displays these parameters in addition to current date and time. It differs from ordinary single-phase meters because it uses two current transformers (CT) to measure active power in both live and neutral wires. This enables the meter to detect, signal, and continue to measure the active energy consumed reliably even after the meter has been tampered. ST7FLite20 is the microcontroller used to perform all the measurements in the meter. This means there is no ASSP (Application Specific Standard Product) used for energy measurement. The active energy consumed is available in the form of frequency-modulated pulse outputs and the accumulated active energy is displayed on the LCD display module (GDM093).