ESP8266 Community Forum

- Wed Jan 28, 2015 1:55 am #8385 I have now resolved the issue. Here is what I was doing wrong just in case if someone in future falls into same trap.
When you load ESP8266Flasher.exe, the default configuration in the "Config" tab has 4 entries

x INTERNAL://FLASH At 0x00000
x INTERNAL://IROM At 0x10000
x INTERNAL://DEFAULT At 0x7C000
x INTERNAL://BLANK At 0x7E000

All 4 entries are selected. If you want to upload a new firmware, only select 0x00000, give the correct file path, unselect other 3 configuration and flash.
I had kept all 4 entries checked.
This worked for me. It may or may not work for you but just something to try at your own risk

- Sat Feb 14, 2015 6:24 pm #9782

Yo need full Erase chip. And check your power supply.

I am having the same problem as the original poster here. How would one fully erase the chip as you've suggested?

- Sat Feb 14, 2015 7:09 pm #9787 [I am having the same problem as the original poster here. How would one fully erase the chip as you've suggested?[/quote]
flash the nodemcu-firmware-master\pre_build\0.9.4\512k-flash\blank512k.bin

- Tue Feb 17, 2015 12:16 am #9989 Thanks for the quick reply. I'm still getting the following Fatal Exception error at 74880 baud.

Code: Select allFatal exception (0):
epc1=0x4021058c, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000

Here are the steps I followed. Any advice would be appreciated.

• Rebooted device in flash mode
• Flashed device with the blank512k.bin
• Rebooted device normal mode - No more fatal error
• Rebooted device in flash mode
• Flashed device with latest NodeMCU firmware
• Rebooted device normal mode - Fatal Error once again transmitting repeatedly

EDIT
Reflashed with v0.9.2.2 AT Firmware.bin and it still transmits the Fatal Error repeatedly. The only difference now is that the epc1 code is different. See below:

Code: Select allepc1=0x402404a8