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Open arduino IDE and click on "File -> Preferences".
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In "Aditional Boards Manager URLs" add this line and click on "OK": "http://arduino.esp8266.com/stable/package_esp8266com_index.json"
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Go to "Tools -> Board -> Boards Manager", type "ESP8266" and install it.
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Go to: https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers
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Download the drivers and Install
