ESP8266 Community Forum

- Fri Aug 30, 2019 10:44 am #83608 sorry for the delay. I'm using a 1a 5v power supply that is going through a regulator down to 3.3v.

Flashing failed (I can't tell you the reason): there's a checksum error in the image

So the bin file I'm uploading to the ESP is bad? That's strange because I've tried many different ones (AT, micropython, ESPHome, etc). Do you see this by the existence of the "csum err" ?
Any suggestions?


I've tried all this on 2 ESP-07s, with the same results. Is it possible they both are bad?


thanks

- Fri Aug 30, 2019 2:57 pm #83610 be conservative on flashing options: try setting (flash size to 1Mb and) mode to dio or dout

edit: ok, it detects 1MB automatically.

- Fri Aug 30, 2019 6:10 pm #83611

So the bin file I'm uploading to the ESP is bad?

No sorry, what I meant was: an image with a certain known checksum was flashed, but when the ESP checks this value afterwards (at boot) against what's inside the flash. they do not correspond.
Most likely flashing itself failed, tweak the parameters and try again.

Assumption is the mother of all f*ckups. At least: that's what I'm assuming.

- Sat Aug 31, 2019 3:57 pm #83623 changing the flash mode to "dout" fixed the issue. Now when it boots, it actually boots.

Code: Select allxx@xxx:~ $ esptool.py --chip auto --port /dev/ttyAMA0 --baud 57600 write_flash --flash_size=detect -fm dout 0 <bin file>

https://github.com/espressif/esptool/wi ... lash-Modes

Thanks for the help.