09-03-2015, 17:06
I don't have any of those right here with me, but if I'm not mistaken, it's the same connecting in any of those GND because electrically they are connected together (in the module itself and on the pcb).
Anyway, since you're testing just with a fence wire, you could forget about GND for now, since using just a simple wire, you must connect it, to the ANT pin and nothing else.
By the way, try with 16cm and not 18cm since it's near from 1/4 wave length for 433Mhz (if I was not mistaken in calculation, the best measure should be 16,5 cm). Being that "far" from the right value, will affect specially RX like you're experiencing.
About the second question and without using additional hardware, I'm not imagining an arduino measuring signal strength at least with accuracy.
You could try for example use a "special" TV dongle (you can find it very cheap on ebay) and use SDRSHARP with it.
Google it for more info or if you are interested on that, just ask about it and I could give you more info.
Anyway, since you're testing just with a fence wire, you could forget about GND for now, since using just a simple wire, you must connect it, to the ANT pin and nothing else.
By the way, try with 16cm and not 18cm since it's near from 1/4 wave length for 433Mhz (if I was not mistaken in calculation, the best measure should be 16,5 cm). Being that "far" from the right value, will affect specially RX like you're experiencing.
About the second question and without using additional hardware, I'm not imagining an arduino measuring signal strength at least with accuracy.
You could try for example use a "special" TV dongle (you can find it very cheap on ebay) and use SDRSHARP with it.
Google it for more info or if you are interested on that, just ask about it and I could give you more info.