i want to send some data to 3 Km over, in 2.4GHz frequency,
i find this module:
and xbee pro s2
datasheet say out door rang for both is near 3 Km, but i want to use that in a place with some barrier
so i decided to use antenna
i want to chose one antenna with booster
which paramter is important to chose?
if i place transceiver in a metal shield, do we have noise? our distance rang decrease?