Wireless Heart Signal Monitoring with Smartphone as Storage Media

Early prevention of heart disease can be done by monitoring the condition of heart's health using an electrocardiograph (ECG). In order to make it easier for medical personnel to monitor heart signals, a media for storing results is needed when an examination is carried out. Storage media will be even more effective if it can be accessed remotely. The purpose of this study was to design a modified ECG to check the condition of the heart using a data logger system. The device is designed in simple and applicable which smartphone acts as the display in real-time and can store the readings. This problem is limited by the research device using one lead to monitor heart signals. This study uses AD8232 as a heart signal receiver from the body and Wemos Dl Mini as a link to WiFi to display data on a smartphone using a created application. The measurement and testing methods carried out are by comparing the heart rate (BPM) value with the Phantom ECG input read on a smartphone, comparing the readings of the human heart signal on smartphone and ECG, and testing the human BPM value on smartphone. The overall results of reading the BPM value in the design obtained the error value under 5%. Sending data from Wemos D1 Mini as a media hotspot programmed using Arduino IDE software works well. The results of the heart signal data that are read on the smartphone can be stored so that users can send or print them.