I am currently looking at designing a wearable device for a client, which can communicate GPS coordinates back to some sort of central server (to then be sent out to other communicating devices such as mobile phones). The area of the tracking system would be known, and would be a confined space (let's say within a 3 mile radius).
I have no experience in this field and want to know the different options available for sending the GPS coordinates out from the device. The way I see it there are 2 options (that I know about):
- Use mobile networks and some sort of SIM card to communicate the coordinates back
- Use a local WIFI network and some sort of wireless communicator in the device
There may be other types of hardware that I know nothing about, hence why I have asked this question on here to get a bit of advice.