Wireless chips

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Various wireless chips are available for electronics projects. Here is a brief comparison.

Name Frequency Data rate Range Current Pros Cons Price
XBee 2.4 GHz (IEEE 802.15.4) 250 kbps ~90m  ? mA
  • Fast
  • Easy to use
  • P2P mesh network
  • No configuration needed for serial communications
  • 128-bit AES encryption
  • DigiMesh protocol available
  • Slightly expensive
  • Maximum of 8 nodes per coordinator ("hub")
~$23
Nordic WRL 2.4 GHz 20 kbps Personal area 30µA
  • max 65000 simultaneous connections on Shared Channel Network
  • Many network topographies supported
  • Drop in serial interface
  • max 4 2-way simultaneous connections
  • No built in encryption
~$20
Holy Stone ASK RF 315 MHz / 434 MHz 2400 bps/ 4800 bps ~150 meters 3.5 mA
  • Really cheap
  • Drop in serial communications
  • Assymetric design; recievers are not transmitters
  • Only one transmitter per network
  • Non-open frequency
  • Fairly large package
~$10 per pair