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![solved] Using uart pins tx & rx and SPI with ESP8266 - Microcontrollers - Arduino Forum](https://aws1.discourse-cdn.com/arduino/original/4X/2/5/b/25b966b0d78f0cb545860bbecde5ec5b7bb3560b.png "solved] Using uart pins tx & rx and SPI with ESP8266 - Microcontrollers - Arduino Forum")
solved] Using uart pins tx & rx and SPI with ESP8266 - Microcontrollers - Arduino Forum
ESP8266 pinout reference and how to use GPIO pins
