Update LED_BUILTIN pin for LoLin32

[BlueCoal69]

The LED_BUILTIN is on pin 5 per Wemos pics on https://wiki.wemos.cc/products:lolin32:lolin32

I tested the change to five and it works. pin 2 does not work

[wemos]

#362
I make new pull request today.

[uribass]

The LED_BUILTIN in active LOW

[scottchiefbaker]

Just to clarify, because this confused me... You have to set pin 5 LOW to turn the LED on, and HIGH if you want to turn it off.

digitalWrite(LED_BUILTIN, LOW); // Turn LED ON

[AndrasSzep]

The built-in LED is on pin 22 (GPIO22)

[a-w]

The built-in LED is on pin 22 (GPIO22)

According to the schematic, the LED is on GPIO5