An Android smartphone is used for heart rate monitoring and displaying electrocardiogram (ECG) graphs. The acquisition of ECG data is utilized by the AD8232 module (a) from Analog Devices, three electrodes (RA, RL, and LA), and the microcontroller Arduino UNO R3 (b). To record the ECG data from a patient, three electrodes are attached to the body's surface. The patient's heart activity, which is recorded by the AD8232 module, is decoded by the Arduino UNO R3 into analog data. ECG data are sent to an Android smartphone (d) by Bluetooth BLE (c). ECG data is displayed as a graph on an Android smartphone. Then, the analog data is converted into a voltage value (mV) and processed to get the QRS complex peak. The heart rate value is calculated on the Android smartphone.
Aug 2017 — Feb 2020