X-NUCLEO-S2868A1+long range distance

Hi. i have two STM32F207 with X-NUCLEO-S2868A1.

I make working each other with PSP_Demo project. I'd like to check for long distance but i cannot make work.

i'm new about sug-ghz, antennas and others.

i made it work for about 500 meter in open space withot building.

i'd like to make work for aboiut 3 km. over internet i foud some ST Test talking about 50 km and more.

Someone may suggest me something?

regards,

Carmelo Gallucci

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