I'm making a project which involves the use of two HM-TRP radio modules.
At this time, the only way I can test the strength of these modules is to go out on the street and travel with one unit for about 1km until I see signs of data disconnection (example, led on my board flashing).
What I want to do instead is to make the signal transmission weaker without actually configuring the on-board hardware. I mean if I had an elevator made of solid construction in my house or even a subway station with no service nearby, I'd probably be all setup because then I can put a module in one of those things and test my signal without walking 1km.
Since I have no access to either of those things, the only other things I could think of is to use a sheet of mesh wire or cover even one of my units almost completely with aluminum foil.
The point is, winter is approaching and I don't want to freeze my fingers off while running wireless tests. Am I on the right track with using aluminum foil and mesh or are there better things I can use to make a radio module transmission more difficult?
The modules are set to run at 915Mhz frequency.