ESP8266 Community Forum

- Wed May 27, 2015 1:38 pm #18628 Hello, I've tried searching for someone else who has had my problem and come up empty.

I'm trying the first, basic, thing with a new ESP8266, hooking up through a USB-serial adapter. I have one with a 3v switch, and I've tried pull-up resisters on RST and CH_PD as here:

http://www.xess.com/blog/esp8266-reflash/

using ubuntu/minicom I can get something, but wdt resets every few seconds.

I'm not sure where to look, whether not to trust my USB-serial adapter, or ??

Code: Select all ets Jan  8 2013,rst cause:4, boot mode:(3,7)

wdt reset
load 0x40100000, len 816, room 16
tail 0
chksum 0x8d
load 0x3ffe8000, len 788, room 8
tail 12
chksum 0xcf
ho 0 tail 12 room 4
load 0x3ffe8314, len 288, room 12
tail 4
chksum 0xcf
csum 0xcf

2nd boot version : 1.2
  SPI Speed      : 40MHz
  SPI Mode       : QIO
  SPI Flash Size : 4Mbit
jump to run user1

sd�
Ai-Thinker Technology Co. Ltd.

invalid

 ets Jan  8 2013,rst cause:4, boot mode:(3,7)

wdt reset
load 0x40100000, len 816, room 16
tail 0
chksum 0x8d
load 0x3ffe8000, len 788, room 8
tail 12
chksum 0xcf
ho 0 tail 12 room 4
load 0x3ffe8314, len 288, room 12
tail 4
chksum 0xcf
csum 0xcf

2nd boot version : 1.2
  SPI Speed      : 40MHz
  SPI Mode       : QIO
  SPI Flash Size : 4Mbit
jump to run user1

sd�
Ai-Thinker Technology Co. Ltd.

invalid

 ets Jan  8 2013,rst cause:4, boot mode:(3,7)

wdt reset
load 0x40100000, len 816, room 16
tail 0
chksum 0x8d
load 0x3ffe8000, len 788, room 8
tail 12
chksum 0xcf
ho 0 tail 12 room 4
load 0x3ffe8314, len 288, room 12
tail 4
chksum 0xcf
csum 0xcf                                                             
                                                                       
2nd boot version : 1.2                                                 
  SPI Speed      : 40MHz                                               
  SPI Mode       : QIO
  SPI Flash Size : 4Mbit
jump to run user1

s$�
Ai-Thinker Technology Co. Ltd.

invalid


- Wed May 27, 2015 1:51 pm #18631 Moin,

First guess: you need a stable power supply. Most usb uart adapters can't provide enough current.

Hope that helps, cal

Get your modules here:

https://www.banggood.com/custlink/KvGGhGF4wG

- Wed May 27, 2015 1:57 pm #18634 ok, I guess I've heard that. I'll shut down for today and try to find a good ps. thx

- Wed May 27, 2015 2:45 pm #18648 Is this by chance a ESP-12 module? My first guess is to agree with Cal but I've been debugging some ESP-12 modules that have many more problems than my ESP-07 modules. Later this week I'll be posting some additional testing I've planned once I receive some parts.