@ARTICLE{Mohsen_Saeed_An_2020, author={Mohsen, Saeed and Zekry, Abdelhalim and Youssef, Khaled and Abouelatta, Mohamed}, volume={vol. 66}, number={No 2}, journal={International Journal of Electronics and Telecommunications}, pages={267-272}, howpublished={online}, year={2020}, publisher={Polish Academy of Sciences Committee of Electronics and Telecommunications}, abstract={In this paper, an autonomous wearable sensor node is developed for long-term continuous healthcare monitoring. This node is used to monitor the body temperature and heart rate of a human through a mobile application. Thus, it includes a temperature sensor, a heart pulse sensor, a low-power microcontroller, and a Bluetooth low energy (BLE) module. The power supply of the node is a lithium-ion rechargeable battery, but this battery has a limited lifetime. Therefore, a photovoltaic (PV) energy harvesting system is proposed to prolong the battery lifetime of the sensor node. The PV energy harvesting system consists of a flexible photovoltaic panel, and a charging controller. This PV energy harvesting system is practically tested outdoor under lighting intensity of 1000 W/m2. Experimentally, the overall power consumption of the node is 4.97 mW and its lifetime about 246 hours in active-sleep mode. Finally, the experimental results demonstrate long-term and sustainable operation for the wearable sensor node.}, type={Article}, title={An Autonomous Wearable Sensor Node for Long-Term Healthcare Monitoring Powered by a Photovoltaic Energy Harvesting System}, URL={http://journals.pan.pl/Content/115200/PDF/36_2020.pdf}, doi={10.24425/ijet.2020.131873}, keywords={energy harvesting, healthcare monitoring, wearable sensor nodes, photovoltaic, Bluetooth low energy (BLE)}, }