I am very new in this field.
I would like to get some suggestions from you all about any Arduino products available in the market have GPS function with these specifications as below:
can store track records.
can function underground.
Small in size.
low battery consumption.
Appreciate if you can give some valuable suggestion on this.
Is this for tracking mining vehicles or the progress of a drill head used for laying pipes?
If its the former then bluetooth or WiFi beacons placed in the tunnels can be used to gauge an approximate location.
JeffQ:
actually, it is for running inside the pipe underground. So any device can do this?
Laying a power cable and a beacon every 40 meters isn't going to be cheap. If the pipe is curved then you'll need more so there will always be line of sight to at least one beacon.
The cabling and the boxes to house the beacons will probably cost 100x more than the electronics inside.
I doubt this is a new idea. Perhaps see what the mining companies use for vehicle tracking and adapt that to your own needs.