trasmissione dati lunghe distanze

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ciao,

avrei necessità di trasmettere dati circa 5 km in linea d'aria (campo aperto, nessun muro nulla in mezzo)
sapete dei moduli che bbiano carattestiche di trasmissione simili?

interfaccia seriale o qualsiasi, preferibilmente bidirezionali ma non è strettamente necessario.

spesa massima 70/80 euro (tx e rx)

cosa mi consigliate?
io ho trovato questi:
http://it.rs-online.com/web/p/zigbee-ieee-802154/6997317/
con tra l'altro già il processore, ma da come ho capito gli serve ancora un pcb esterno per collagare l'antenna vero? ed essendo un pcb per rf farlo in casa..

http://lairdtech.stage.thomasnet-navigator.com/item/2-4-ghz-modules/lt2510-flexrf-reg-2-4-ghz-wireless-module/prm120?
però lo trovo solo da mouser e si spende troppo di spedizioni, e poi non capisco se può essere quello che cerco, cioè direttamente interfacciabile giusto?

probabilmente serve una qualche licenza perché per coprire distanze così ampie serve una buona potenza e un'antenna direzionale con buon guadagno se vuoi un bitrate decente, di che banda hai bisogno?


Arduino Forum > International > Italiano > Generale (Moderator: leo72) > trasmissione dati lunghe distanze


arduino

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