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The distance is 500m and the location is in a building.I must notice 5 people simultaneously when I push some button on a transmitter. So, five people are carrying the receivers and they will notice beeping sound from the receiver when the transmitter activates.
i have a similar problem, i only want to send 2-d position datas from my computer to robot and a feedback data of the current position. is it possible to build that yourself or to modify these walkie talkies?
if you can make do with less range.
oh, i dont think that this is the right. in ONLY need position data, nothing more, that takes maybe 2 bytes, whatever.perhaps i need 4bytes per second or something. i think a radiomodul is better, but not a bought one because they perform more than i need.