Wi-Fi based Integrated System for the Monitoring of Heart Rate and Peripheral Capillary Oxygen Saturation
John Gialelis
Electrical and Computer Engineering Department, University of Patras, Greece
gialelis@ece.upatras.gr
Vicky Andreakou
Electrical and Computer Engineering Department, University of Patras, Greece
vicky.andreakou@gmail.com
Maria Krizea
Electrical and Computer Engineering Department, University of Patras, Greece
mariakrizea@gmail.com
Abstract
– This work illustrates an integrated system
comprising a low-cost Embedded device connected with a
finger–type Photoplethysmography (PPG) array sensor to
estimate Heart Beats per minute (HR) and Peripheral Capillary
Oxygen Saturation (SpO2) parameters and a web based
application that receives them via Wi-Fi for further processing
and visualization through Message Queuing Telemetry
Transport (MQTT) internet protocol.
In conventional PPG signal sensing approaches, the fingertype
PPG sensor probe is being utilized while Wireless Personal
Area Network (WPAN) technology, mainly Bluetooth Low
Energy (BLE), is used to transmit the data to a gateway acting
as an intermediate.
The low-cost Embedded and microcontroller-based device
that processes the signals collected by the finger-type
Photoplethysmography (PPG) array sensor, extracts both HR
and SpO2 parameters, and ultimately transmits them via Wi-Fi
to a web-based application. The web-based application, which is
a dedicated tool in the hands of the physicians, features an
interface that allows both continuous monitoring and recording
of patients corresponding parameters.
Index Terms
—embedded devices, photoplethysmography, HR, SpO2, Wi-Fi