Digital Sphygmomanometer for Voice-Based Blind

The pandemic requires everyone to do regular health checks. Accordingly, it raises concern for anyone because of the fear of being contracted to the covid-19 virus. Every medical service first checks blood pressure because it measures how strong the heart is to pump blood throughout the body. The measurement aims to determine blood pressure levels to prevent various diseases that may affect the patient's condition. Tensimeters, in general, cannot be read by blind patients, and officers in charge simply report their examination results. Therefore, the experiment intended o design a voice-based blood pressure measurement tool for visually impaired patients. Thereupon, the study used the Linear Sequential Model (LSM) method, and the results met expectations and in accordance with the calibration results like a sphygmomanometer in general. Consequently, a digital sphygmomanometer was designed with a sound output based on the ATmega328 micro controller and can be used by hospitals or self-measurement at home. This tool has an almost similar working principle as any ordinary digital sphygmomanometer using the MPX5700GP pressure sensor, which can measure pressure up to 700psi. The results are displayed on the LCD and voiced through the DFPlayer module containing sound recordings saved on a micro SD.