Blinking of LED ISSUE

[PeteKnight]

A NodeMCU is not a Generic ESP8266 module, it’s a NodeMCU 0.9 or NodeMCU 1.0

@ajitnayak87

pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
pinMode(8, OUTPUT);

These are GPIO numbers, and GPIO’s 6-11 are special reserved pins. If you attempt to use them in your sketch you will get reboots like the ones in your screenshot. Read this:

ESP8266 GPIO pins info, restrictions and features

hi blynkers! the esp8266 mcu is widely used in iot projects. however, most gpio pins on this mcu have special / multiple functionality and are not safe to use in all circumstances. these “features” are still not well documented and not explained in a friendly manner for newbies. i see lots of cases when the “issues” are simply caused by not knowing which pins to use in which case. [esp8266 pin features] here is a basic table for startup. i’ve collected the info from various sources on the i…

Also, your void loop is a mess. Read this:

http://help.blynk.cc/getting-started-library-auth-token-code-examples/blynk-basics/keep-your-void-loop-clean

Pete.