i have a part in my graduation project where i need to direct some robot towards another point using local positioning system
now i dont know much about it but here is what i figured out so far its basically dependent on the fact that you have an RSSI which is the signal strength and u calculate the distance from your current point to a fixed point , using 3 "fixed points" ( called beacons in bluetooth ) you can get the x,y,z co-ordinates(3 equations 3 unknowns, the 3 plans should intersect in a single point) of the robot at the moment
i also got to know that you can use 2 types of things for this job :- a wifi module and a bluetooth module as you can get an RSSI from both modules
i should also use a BLE bluetooth module which is better however this is not really a possibility since these modules aren't sold in my country and i would have to pay a fortune for them when converted to my currency since cost is part of my project
i dont know if there are more types of modules that can be used for this but if there is please enlighten me
but my question is this : can i use any kind of bluetooth module ? HC-05 for example is the one i am working with at the moment , however do i have to use a special something for this application ?
and also which is more accurate the wifi or bluetooth and how accurate are they ?
how can i increase the accuracy of the measurements ?
thanks in advance