Developing a Wireless Heart-Rate Monitor with MAX30100 and nRF51822
Onubeze, Augustine (2016)
Metropolia Ammattikorkeakoulu
2016
All rights reserved
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2016120118617
https://urn.fi/URN:NBN:fi:amk-2016120118617
Tiivistelmä
The purpose of this project was to develop a wireless heart rate monitor based on the principle of photoplethysmography and using the Bluetooth Low Energy (BLE) technology for wireless transfer. The emphasis here was not on the hardware prototype but mainly on the software that drives the sensor and a compatible client mobile application.
The mobile client application is an Android application developed for smart phones powered by Android version 4.4.3 or higher. It enables the Android device to communicate with the sensor to recieve PPG data, process, store and display results. In this project, the mobile device used during the development and testing was an LG Nexus 5 smart phone.
The heart rate monitor developed in this project has two main units, the sensor unit,and the mobile client application. The sensor unit consists of two main components: a heart rate sensor integrated circuit (IC), max30100, which is a complete pulse oximeter and heart-rate sensor solution from Maxim Integrated, and a BLE chip, nRF51822, which is a multiprotocol system on chip for Bluetooth smart and 2.4 GHz ultra low-power wireless applications from Nordic Semiconductors. Both components work as a unit to collect photoplethysmograph (PPG) samples and stream them through an emulated UART/Serial port over BLE to a connected mobile device.
The result of this project includes a laboratory setup for a finger-based heart rate sensor, a firmware for the sensor, and an Android mobile application that works with the sensor. The sensor setup could be further developed into a finger wearable heart rate monitor prototype that can run the same firmware using MAX30100 and nRF51822. With some modifications in the firmware and the client application, the result of this project could also be further developed into a prototype of an oximeter that would also measure blood oxygen saturation.
The mobile client application is an Android application developed for smart phones powered by Android version 4.4.3 or higher. It enables the Android device to communicate with the sensor to recieve PPG data, process, store and display results. In this project, the mobile device used during the development and testing was an LG Nexus 5 smart phone.
The heart rate monitor developed in this project has two main units, the sensor unit,and the mobile client application. The sensor unit consists of two main components: a heart rate sensor integrated circuit (IC), max30100, which is a complete pulse oximeter and heart-rate sensor solution from Maxim Integrated, and a BLE chip, nRF51822, which is a multiprotocol system on chip for Bluetooth smart and 2.4 GHz ultra low-power wireless applications from Nordic Semiconductors. Both components work as a unit to collect photoplethysmograph (PPG) samples and stream them through an emulated UART/Serial port over BLE to a connected mobile device.
The result of this project includes a laboratory setup for a finger-based heart rate sensor, a firmware for the sensor, and an Android mobile application that works with the sensor. The sensor setup could be further developed into a finger wearable heart rate monitor prototype that can run the same firmware using MAX30100 and nRF51822. With some modifications in the firmware and the client application, the result of this project could also be further developed into a prototype of an oximeter that would also measure blood oxygen saturation.