01478nas a2200157   4500008004100000245007200041210006900113260002100182300001200203520089400215100002101109700002201130700002401152700002701176856011701203       2021                        eng d00aReal - Time Geolocation Approach through LoRa on Internet of Things0 aReal Time Geolocation Approach through LoRa on Internet of Thing  cJanuary 13 - 16,  a186-1913 aInternet of Things (IoT) and wireless technologies like LoRa brought more opportunities for application development in a plethora of different fields. One of these is location estimation of real-time objects and people. In this study, we focus on monitoring user’s location through a wearable IoT device with LoRa connectivity. The paper presents the development and integration of an loT ecosystem (Hardware and Software) which can be used in Search and Rescue (SAR) use cases. The proposed IoT ecosystem is evaluated and deployed inreal-scenarios with established gateways. After that we compare  the existed location-estimation methods in terms of attenuation problem, cost and operation as well to conclude to the most suitable solution that can be integrated in LoRaWAN environments. Finally, the conclusions of this work and improvements for possible future activity are described.1 aBouras, Christos1 aGkamas, Apostolos1 aKokkinos, Vasileios1 aPapachristos, Nikolaos  uhttp://telematics.upatras.gr/telematics/publications/real-time-geolocation-approach-through-lora-internet-things