Anyone know of any type of collision avoidance that can be used on a P1 or P2  ?

(something electronic that attaches to the Phantom .....smart elec)   

Look at ebumper or panoptes (same thing)
Ugly, expensive and only works when flying quite slowly.

It's not suggested to do that, since it will increase the take off weight.

I been looking for the same thing found a couple things on ebay waiting for it to come in  then the hook up then the garage test il report back later