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nRF24L01+ Wireless Transceiver Module
$3.95 USD
Availabity: In stock
nRF24L01+ Wireless Transceiver Module
A wonderful, cheap wireless module with plenty of Arduino support - the nRF24L01+ can achieve up to 100ft indoors and 300+ft outdoors (in our own testing). We sourced these from a high quality factory, as we found that many look the same but function very differently.

The i/o lines on this module are 5v tolerant so no level shifter is required to use with 5v devices, though the module itself still needs to be fed 3.3v.

A great introduction, diagrams, and links to libraries for this module

Details of the nRF24L01+ chip:

2.4GHz ISM band operation
900nA deep sleep mode
11.3mA Radio TX
13.3mA Radio RX
0, -6, -12, and -18dBm programmable TX output power
Configurable on-air data rate of 250kbps, 1Mbps or 2Mbps
-94dBm RX sensitivity at 250kbps
Automatic packet assembly
(Preamble, Address, CRC)
Automatic packed detection and validation
Dynamic payload length, 1 to 32Bytes
Auto retransmit
Auto Acknowledgment with optional payload
6 data pipe MultiCeiver
3 separate 32Bytes TX and RX FIFOs
SPI interface, up to 10Mbps
1.9 to 3.6V supply range
5v tolerant inputs (no level shifting required!)
Note: Schematics, source files, software, and datasheets are provided rovided "as is", without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose and noninfringement. in no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the product or the use or other dealings in these products.