Wireless Bluetooth Low Energy (BLE), Voltage Monitoring, Arduino, Real-time Data Transmission, Industrial Applications, Wireless Communication, Cost-effective Monitoring, Embedded Systems, Smart Grid Technology, IoT, Power Efficiency, Sensors, Energy Management, Smart Metering, Power System Monitoring, Renewable Energy Wireless voltage measurement systems have transformed electrical monitoring by offering enhanced portability, flexibility, and real-time data transmission. The adoption of Bluetooth Low Energy (BLE) has further improved these systems by providing low-power, reliable, and cost-effective solutions for voltage monitoring in industrial and remote applications. This review examines recent advancements in BLE-based voltmeter systems, particularly focusing on design aspects, implementation, and key challenges. The integration of Arduino platforms with BLE modules has enabled the development of efficient wireless voltmeter solutions. This paper provides an in-depth analysis of BLE voltmeter technology, discussing communication challenges, power efficiency concerns, and its widespread applications in industrial automation, automotive technology, smart grids, and renewable energy. BLE-based voltage monitoring is expected to play a crucial role in the next generation of smart measurement systems, particularly in Internet of Things (IoT)-based monitoring frameworks.