UART, SDIO, SPI NodeMcu Lua WIFI Networking Development Boards Based ESP8266
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                                            ...WIFI Networking Development Boards Based ESP8266 Specification for esp8266 chip : Model CP8266EX Standards IEEE 802.11n, IEEE 802.11g,IEEE 802.11b Port UART, SDIO, SPI Frequency Range 2.4~2.4835GHz Channel 1-14(optional USA Norm, EN, Japanese Norm) Modulation......                                         
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