It is completely addressable over SPI and UART protocols allowing you to connect your sensors or project directly to it through its GPIO’s. ESP-12F WiFi module is a low-cost Wi-Fi chip with full TCP/IP stack and MCU (Micro Controller Unit) capability.

ESP8266 ESP01 Serial Wifi Wireless Transceiver Module is a self-contained SOC with integrated TCP/IP protocol stack that can give any microcontroller access to your WiFi network. ESP8266 Serial Wifi Wireless Transceiver Module is capable of either hosting an application or offloading all Wi-Fi networking functions from another application processor.

Each ESP8266 module comes pre-programmed with an AT command set firmware, meaning, you can simply hook this up to your Arduino device and get about as much WiFi-ability as a WiFi Shield offers (and that’s just out of the box)! The ESP8266 module is an extremely cost-effective board with a huge, and ever-growing, community.

ESP8266 Serial Wifi Wireless Transceiver Module has a powerful enough onboard processing and storage capability that allows it to be integrated with the sensors and other application specific devices through its GPIOs with minimal development up-front and minimal loading during runtime. Its high degree of on-chip integration allows for minimal external circuitry, including the front-end module, is designed to occupy minimal PCB area. The ESP8266 supports APSD for VoIP applications and Bluetooth co-existence interfaces, it contains a self-calibrated RF allowing it to work under all operating conditions and requires no external RF parts.

They are collectively referred to as “ESP-xx modules”.

Tutorial : How to use?

Improvements :

1. Peripheral circuit
2. The four laminates plate process
3. Enhanced impedance matching
4. Stronger WiFi signal output
5. Anti-jamming ability
6. PCB antenna redesigned after professional laboratory testing

Interface :

1. SDIO 2.0, SPI, UART
2. 32-pin QFN package
3. Integrated RF switch, balun, 24dBm PA, DCXO, and PMU
4. Integrated RISC processor, on-chip memory, and external memory interfaces
5. Integrated MAC/baseband processors
6. Quality of Service management
7. I2S interface for high fidelity audio applications
8. On-chip low-dropout linear regulators for all internal supplies
9. Proprietary spurious-free clock generation architecture
10. Integrated WEP, TKIP, AES, and WAPI engines