sparkfun ESP8266 - Page 18

1/23/2018 ESP8266 Thing Development Board Hookup Guide - learn.sparkfun.com
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Add a Button, then click on it to change its settings. Buttons can toggle outputs on the ESP8266. Set the button’s output to gp5,
which is tied to an LED on the Thing Dev Board. You may also want to change the action to “Switch.”