The Nordic nRF24L01+ is a highly integrated, ultra low power (ULP) 2Mbps RF transceiver IC for the 2.4GHz ISM (Industrial, Scientific and Medical) band. With peak RX/TX currents lower than 14mA, a sub μA power down mode, advanced power management, and a 1.9 to 3.6V supply range, the nRF24L01+ provides a true ULP solution enabling months to years of battery life from coin cell or AA/AAA batteries. The Enhanced ShockBurst™ hardware protocol accelerator offloads time critical protocol functions from the application microcontroller enabling the implementation of advanced and robust wireless connectivity with low cost 3rd-party microcontrollers.
The Nordic nRF24L01+ integrates a complete 2.4GHz RF transceiver, RF synthesizer, and baseband logic including the Enhanced ShockBurst™ hardware protocol accelerator supporting a high-speed SPI interface for the application controller. No external loop filter, resonators, or VCO varactor diodes are required, only a low cost ±60ppm crystal, matching circuitry, and antenna.
The nRF24L01+ is available in a compact 20-pin 4 x 4mm QFN package.
nRF24L01+ has 6 data pypes. This means, that can receive data simultaneously from 5 nRF24L01+. My library uses only 1 data pype, so 2 nRF24L01s can be connected together and communicate. Every of them has an unique 5bytes long address, which is software selectable.

RF24L01+ SI24R1 2.4G Wireless Power Enhanced Communication Receiver Module

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