Im looking at making a small device that can detect another device on a bearing. So if the main device points within a few degrees of the secondary device it triggers (alarms). Ideally would be able to work over medium to long ranges and not have any problem with barriers or anything blocking line of sight between devices. Im not sure if this is a silly or unrealistic question but thought this would be the best place to start.

 

Ideally would be able to work over medium to long ranges

What are these distances ?

Regards, Dana.

 

Hi Dana.

Looking at distances anywhere between 10m and 150/200m.

Kind Regards, Matt.

 

GPS then makes most sense. Its accurate to < 10m.

Modules for embedded work cheap, interfaces I2C, SPI.

Google "Arduino GPS"....


Regards, Dana.

 

I think that you want to build a simple atr system.
This is not simple.
Using GPS could be a solution however; the accuracy in urban environment (creating reflections) will reduce the accuracy a lot.
I did measure 100mtrs maximum in a city. GPS build in a car will/could correct the position with 2d or 3d acceleration meter and the probability of position on the map.
This is very noticeable in a long tunnel or huge parking garage.


Picbuster