Tim,

I have removed all the breakpoints from the code, just to eliminate any possible issue.  The compiler has been set to "Release".  Still, no output from the Serial print commands.

I know the loop() is running since the other part of the Blynk application is on an android tablet.  The display on the tablet changes as particular GPIO pins on the NodeMCU have their digital states changed.  That can only happen if the loop() is looping.

Current screenshot image is attached.

Sent, per your request.

Tim,

I do not understand what you are asking for.  What is autocode for an esp8266 HUZZA?

I need an authcode for the blynk service and the one in your code was rejected I will try your email over the next day or so thanks.

Does all the serial show in the arduino ide?

Tim,

Has your investigation uncovered anything?

I tried the Blynk example and it's working okay for me. It works both with and without debug enabled.

I was testing with a huzza that has less pins. I found the board would crash a lot if I attempted to set the pinMode for invalid pins. The board is obviously sensitive to using pinMode on pins that do not exist. It might be unrelated but I suggest that you do not use pinMode on pins you are not using. 

I was only testing so i hard coded leftDoorOpen = true and commented the pinModes.Otherwise test was same as your but without the your debug #define.

// Set GPIO pin modes
	//pinMode(Unused10, INPUT_PULLUP);
	//pinMode(Unused09, INPUT_PULLUP);

	//pinMode(Unused16, INPUT);
	//pinMode(leftDoorInput, INPUT_PULLUP);
	//pinMode(rightDoorInput, INPUT_PULLUP);
	//pinMode(Unused00, INPUT);
	//pinMode(Unused02, INPUT);
	//pinMode(backDoorInput, INPUT_PULLUP);
	//pinMode(Unused12, INPUT_PULLUP);
	//pinMode(Unused13, INPUT_PULLUP);
	//pinMode(Unused15, INPUT_PULLUP);
	//pinMode(Unused03, INPUT_PULLUP);
	//pinMode(Unused01, INPUT_PULLUP);