Abstract:
Sphygmomanometer an instrument for measuring blood pressure are often used in the
medical world. Its function is vital because it is the basic for doctors to diagnose the
patient’s current health check-up. Sphygmomanometer generally divided into two, those
are analog and digital sphygmomanometer. In the modern period right now, Android
smartphones already developed with all features which very sophisticated. Because of its
makes author using Arduino Uno as a microcontroller. The method used in this research
was experiment. To be able to detect the blood pressure values, it is also using a
MPX5050DP sensors that will change the pressure value into voltage, then the value will
be processed by a microcontroller to determine the value of systole and diastole. After the
systolic and diastolic values obtained then the results will be displayed on the LCD screen
located on the instrument and transferred to the smartphone’s display on the screen the
application via Bluetooth BT-05. The results of experiment are the percentage error equal
to 2.06% for systole and diastole. Arduino Sphygmomanometer can work well when the
patient is in a relaxed condition.
