ESP8266 Community Forum

I'm using nodemcu development board with arduino IDE.
my project require almost every available gpio pin on the board (around 11 usable pins)
when I try to connect leds to each pin (with proper resistor for max current the pin can handle and overall current consumption) and try to blink each one, only D4 light up and nothing else happens..
Yet when I write a code to just blink one led (pin) and physically connect one led to the board everything works fine no matter which pin I use!!

any suggestion of my flaw?

With 11gpios wired I am pretty sure you used at least one that is problematic an interferes with the boot process.
So no more 'guess' without sketch and schematic.