ESP-12E: ESP8266 Serial Port WIFI Wireless Transceiver Module For Arduino is perfect solution for home Automation and IoT applications and can be the replacement of your NRF24L01 and can communicate with your WIFI router directly through the UART MCU’s (Rx, Tx).
 
 
Wireless Standards
802.11 b/g/n
Frequency Range
2.4GHz-2.5GHz (2400M-2483.5M)
Data Interface
UART / HSPI / I2C / I2S / Ir Remote Contorl GPIO / PWM
Operating Voltage
3.0 ~ 3.6V (recommendation 3.3V)
Working Current
80mA (Average)
Operating Temperature (°C)
-40 to 125
PCB Size ( L x W ) mm
25 x 16