This document describes the mechanism that must be used to exchange data between an IOPES wearable device and an EMS (Emergency Management System).

The task of the IOPES wearable devices is to compute the positions of their users in real-time, no matter they are indoors or outdoors. Additionally, the said position must be delivered to the EMS, so the members of the emergency teams may be always tracked by the staff managing the emergency.

Therefore, and besides the need of a communication channel to make possible the remote exchange of information – such as 3G, 4G or 5G –, it is necessary to describe how such information will be transmitted between the wearable device and the EMS and vice versa. That is, a protocol must be stated to avoid misunderstanding between these two endpoints and to
guarantee that information is correctly exchanged.

The task of this report is describing such protocol, implemented as a REST API (Application Programming Interface), protocol that any application – including the one driving the IOPES wearable device – must implement to make possible such communication with a target EMS.

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