ESP8266 Community Forum

martinayotte wrote:I've never used this chip since I've used some Winbond on eBay to upgrade few ESP-01 that I have.
Did you try more simplier sketch like Blinker ?
Did you confirm that firmware is properly uploaded by doing a read_flash with esptool.py and compare it with original ?

Yes, I'm testing it with the blink sketch that was working before changing flash chip.

Seems that the message i get:
ets Jan 8 2013,rst cause:2, boot mode:(3,7)

ets_main.c
is due to bootloader which cannot find the program to execute.
I think I've configured right the board in arduino ide, 32mbit.

As I said :

Did you confirm that firmware is properly uploaded by doing a read_flash with esptool.py and compare it with original ?

martinayotte wrote:As I said :

Did you confirm that firmware is properly uploaded by doing a read_flash with esptool.py and compare it with original ?

ESP_DOWNLOAD_TOOL_V2.4 cannot do anything with esp and 32mbit flash memory I adopted.
I'm gonna write on Espressif's forum to see if they have some hint about.
For the moment resoldered original flash... :/

When I've upgraded some of my ESPs, one wasn't working, looking with magnifier, I saw that one soldering was bad.
Such mistakes can be done easily since the bigger Flash are a bit larger than old ones.
Your can use esptool.py to read flash_id, if it doesn't read it, maybe it is soldering problem.