ESP8266 Community Forum

Hi all,
How to solve fatal exception error in ESP8266 - 01?
Fatal exception (0):
epc1=0x40100003, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000
Fatal exception (0):
epc1=0x40100003, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000
Fatal exception (0):

You may try to use:

xtensa-lx106-elf-objdump -x app.out -d

and find 40100003 which will tell you where in your code the exception takes place.

The procedure is explained in ESP2866 book by Neil Kolban