WS2812B LED strip and ESP8266 shows wrong colors

This is the reason you have to run a extra neopixel.write() command:

Every time you upload with reset some extra pinMode commands are included:

>reset()
=undefined
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>dump()
pinMode(D0, "input_pullup", true);
pinMode(D4, "input_pullup", true);
pinMode(D5, "input_pullup", true);
pinMode(D12, "input_pullup", true);
pinMode(D13, "input_pullup", true);
pinMode(D14, "input_pullup", true);
pinMode(D15, "input_pullup", true);
=undefined

This is very helpful, because you always start with the same defined pinMode for all pins.

I suggest to include a pinMode() for pins you use different.

var neo = require("neopixel");
var neoPin = NodeMCU.D4;  // D2
pinMode(neoPin,'output');
neo.write(neoPin, [25, 0, 0]);  // 255 is to bright for me :)

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