user51858: I'm new to arduino and knnow nothing about electronics.
How do I idenitify which pin is which in the coding?
eg- I have a pin on my esp8266 "D3"... how would I reference that in the code?

user37622: If you select the right board in Tools menu, you can use constants corresponding to labels.
pinMode(D3, OUTPUT);
digitalWrite(D3, LOW);


51858: <p>I'm new to arduino and knnow nothing about electronics.
How do I idenitify which pin is which in the coding?
eg- I have a pin on my esp8266 "D3"... how would I reference that in the code?</p>
 37622: <p>If you select the right board in Tools menu, you can use constants corresponding to labels.</p>

<pre><code>pinMode(D3, OUTPUT);
digitalWrite(D3, LOW);
</code></pre>
