In fact, I have been working on my NodeMCU V2 since 2 months. It was working fine for a while (almost 1 month). Suddenly, I got the error. I am programming it with an Arduino IDE. I also realized that it does not depend on the program because I tried many programs (from the simple blinking led to the intermediate one like connecting with an MQTT broker).
I would love if some gentle man can explain 1) what does this error mean? and 2) why I am getting it and 3) what are the possible reasons.
So most probably, it is a hardware failure. I am connecting the nodemcu via a usb cable!
WHAT APPEARS ON THE SERIAL CONSOLE:
*******************************************************
ets Jan 8 2013,rst cause:4, boot mode:(3,6)
wdt reset
load 0x4010f000, len 1384, room 16
tail 8
chksum 0x2d
csum 0x2d
v09f0c112
~ld
Sometime I get the error with mode:(3,6) and other times I get and mode:(3,7) ...