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This serial WiFi transceiver module is based on ESP8266 SoC.. ESP8266 is a highly integrated chip that has an Integrated TCP/IP protocol stack. It offers a complete and self-contained Wi-Fi networking solution, allowing it to either host the application or offload all Wi-Fi networking functions from another application processor. Besides, ESP8266 has powerful onboard processing and storage capabilities that allow 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, and the entire solution, including the front-end module, is designed to occupy minimal PCB area.
Specification
802.11 b/g/n
Wi-Fi Direct (P2P), soft-AP
SPI Flash:2MB
Integrated TCP/IP protocol stack
Integrated TR switch, balun, LNA, power amplifier and matching network
Integrated PLLs, regulators, DCXO and power management units
+19.5dBm output power in 802.11b mode
Power down leakage current of <10uA
Integrated low power 32-bit CPU could be used as application processor