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ESP8266 WIFI Development Kit

The test board is an easy way to get started with the full range of available functions on the ESP8266

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16.01 JD

LEDs

There are also 6 red leds fixed with the necessary resistors connected to GPIO16, GPIO14, GPIO5, GPIO4, GPIO0 and GPIO2. A blue LED is always on if the board is powered. 
The GPIO13, GPIO12 and GPIO15 are connected to a RGB LED which allows you color mixing using PWM.

ADC

The analog-digital converter is also available on a pin but it is also connected to a light resistor. This lets you quickly test the ADC and you still can clip the resistor off if you want to measure another analog source.
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