This is the other model of ESP8266 module, this board has similarity with the ESP8266 V1, ESP8266 7, ESP8266 12E, the difference of this board has an on-board SMD SMC antenna and extra IO port, this module has self-contained SOC
The NRF24L01 Transceiver Using Arduino with Source Code
The nRF24L01 is highly integrated, Ultra Low Power (ULP) with 2Mbps Radio Frequency Transceiver IC for the 2.4Ghz ISM(Industrial, Scientific and Medical) band. With peak RX TX Currents lower than 14mA, and it has a advance power management integrated to