ESP8266 Wifi Serial Transceiver Module is a very useful Wifi module. The difference from other 2.4 GHz modules is that it supports the TCP/IP protocol. There is an internal antenna on the ESP8266. In this way, it can easily connect to the Wifi network in the environment and receive and send data packets. 

It offers a complete and self-contained Wi-Fi network solution that allows it to host the application or offload all Wi-Fi network functions from another application processor.

The ESP8266 has powerful internal processing and storage capabilities that allow it to integrate with sensors and other application-enabled devices through its GPIOs, with minimal preloading and minimal loading during operation.

The high degree of on-chip integration allows for minimal external circuitry.

The entire solution, including the front-end module, is designed to take up minimal PCB space.

Since there are plenty of sample applications on the Internet related to the product, it is the most preferred module worldwide.

Technical Specifications:

• 802.11 b/g/n support,
• Wi-Fi Direct (P2P) Support,
• Built-in TCP/IP protocol stack,
• +19.5dBm output power (in 802.11b mode),
• Leakage current: <10uA,
• Built-in 32-bit processor with low power consumption,
• SDIO 1.1/2.0, SPI and UART support,
• STBC, 1x1 MIMO, 2x1 MIMO,
• Time to wake up and receive data packet: <2ms,
• Power consumption in stand-by state: <1mW.