Hardware-Software Data Acquisition System for Measuring the Grip Strength in Children

Hand grip strength is an important indicator of muscular development, physical fitness, and overall health in children. Accurate measurement of grip strength plays a vital role in pediatric healthcare, physiotherapy, rehabilitation, and clinical assessment. Conventional grip strength measurement devices are often expensive, bulky, and lack digital data acquisition and wireless communication capabilities. This project presents a Hardware–Software Data Acquisition System for Measuring the Grip Strength in Children, a portable and low-cost embedded system designed for accurate measurement, real-time monitoring, and wireless transmission of grip strength data. The proposed system is built around an Arduino Uno integrated with two force sensors, a temperature sensor, HC-05 Bluetooth module, I2C LCD display, push buttons, buzzer, and LED indicators. The force sensors measure the gripping force applied by the child, while the temperature sensor records the ambient or hand temperature during the test to provide additional physiological information. The measured grip strength and temperature values are displayed in real time on the I2C LCD and simultaneously transmitted through the HC-05 Bluetooth module to an Android application or computer for data storage, visualization, and analysis. Push buttons enable users to initiate or reset the measurement process, whereas the LEDs and buzzer provide visual and audible feedback regarding system operation and measurement status. By combining embedded hardware with wireless data acquisition, the proposed system offers a reliable, cost-effective, and user-friendly solution for objective grip strength assessment. The system is suitable for pediatric healthcare centers, hospitals, physiotherapy clinics, rehabilitation centers, schools, sports training facilities, and biomedical research applications.