Low cost RF solution for midrange communication

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Hi all,

I am new to working with RF communication, i am looking for a low cost RF solution that has a range of about 200 meters. Preferably a multipoint network.I am not looking for something with high data rates.

I have looked at the ZigBee modules 900Mhz series, but they are a bit on the expensive side. Does anyone have a suggestion or experience with such designs?

Thanks,
snadbox
 

To extend the range of typical Wifi, Zigbee or Bluetooth , directional antennas can help. For your case, I saw companies offering modified cell phones with SIM cards for their use as sensor network nodes. Google "sensor networks" , this field has recently developed quite rapidly.
 

I looked around for the sim card based sensor networks but could not find any, can you please post a link?
 

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