A Portable WiFi ECG

The development of information and communication technology has improved health tele-care by providing more sophisticated analysis software to support a realtime processing of ECG signals. Moreover, intense research has been devoted to the development of an affordable and reliable ECG for daily monitoring and outpatient usage. Meanwhile, the increase in manufacturing of small system module in medical diagnostic equipment for digital signal processing (DSP) applications can provide affordable ECGs with real-time processing which is suitable for monitoring and alert system. In this study, a wireless communication channel of ECG is developed using an ESP8266 WiFi module and an BMD101 Neurosky bio-signal system-on-a-chip (SoC) device. The SoC is designed with a powerful DSP structure which has a filter, amplifier, 16-bit analog-digital converter and an integrated 22.1MHz clock reference signal. The ECG circuit is equipped with single lead of two inputs of positive and negative. The size of the ECG circuit is as compact as 4.5 cm × 3 cm of length x width and it is a portable device. The performance shows the ECG device was able to capture the normal sinus rhythm of 60 beat-per-minute (bpm), 80 bpm, 100 bpm and 120 bpm from a patient simulator. The ECG circuit design also able to capture abnormal sinus rhythm such as atrial fibrillation, ventricular tachycardia, ventricular fibrillation.