Re: ESP-12 won't boot (gpioO problem?)
Posted:
Fri Jul 03, 2015 12:32 pmby crstrand
I see the "...boot mode:(1,7)" at 74880 then garbage keeps pouring on the terminal.
This is using PuTTY and TeraTerm. I've tried every baud rate I can think of and/or have found mentioned on this forum.
Is there some way to blast it back to the stone age and start from scratch?
Re: ESP-12 won't boot (gpioO problem?)
Posted:
Fri Jul 03, 2015 1:43 pmby tytower
Yeh . Just hit it with a rock !
Re: ESP-12 won't boot (gpioO problem?)
Posted:
Sat Jul 04, 2015 8:59 amby dsvilko
I've finally managed to connect it to a Windows computer and see the boot messages. This is what I got:
Code: Select allets Jan 8 2013,rst cause:2, boot mode:(3,6)
load 0x40100000, len 30452, room 16
tail 4
chksum 0xef
load 0x00000000, len 0, room 4
tail 0
chksum 0xef
ho 12 tail 0 room 4
load 0x00000000, len 0, room 12
tail 0
chksum 0xef
csum 0xef
csum err
ets_main.c
Any ideas what the problem could be?
Re: ESP-12 won't boot (gpioO problem?)
Posted:
Sat Jul 04, 2015 10:07 amby Tung
Dear all,
I also got the same problem!
My PIN configuration:
* Flash Mode:
- CH_PD, REST, GPIO15, GPIO2 = VCC 3.3 V
- GPIO0 = GND
- After flash firmware (example: AT firmware) without reset (unplug and plug power) I can perform AT command via baud rate = 115200
- If I try to change GPIO0 to HIGH or FLOATING and reset -> I can't access serial any more (seem the esp8266 is fail to boot in this case).
So I you can fix this issue, please let me know.
Thank you so much.