This is the HC-21 an embedded Wi-Fi UART module built IEEE802.11 wireless network protocol stacks and TCP/IP protocol to achieve conversation between serial data to wireless network communication. The HC21 can be connected via wireless to wireless without any support
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