ESP8266 Community Forum

- Thu Oct 30, 2014 10:13 pm #2082 I just received a set of four ESP-1 (updated design) boards. When I attempt to connect them, they continually reset as follows:

Code: Select allwdt reset
load 0x40100000, len 24444, room 16
tail 12
chksum 0xe0
ho 0 tail 12 room 4
load 0x3ffe8000, len 3168, room 12
tail 4
chksum 0x93
load 0x3ffe8c60, len 4956, room 4
tail 8
chksum 0xbd
csum 0xbd
Fatal exception (0):
epc1=0x40247ce1, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000

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

wdt reset
load 0x40100000, len 24444, room 16
tail 12
chksum 0xe0
ho 0 tail 12 room 4
load 0x3ffe8000, len 3168, room 12
tail 4
chksum 0x93
load 0x3ffe8c60, len 4956, room 4
tail 8
chksum 0xbd
csum 0xbd
Fatal exception (0):
epc1=0x40247ce1, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000

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

wdt reset
load 0x40100000, len 24444, room 16
tail 12
chksum 0xe0
ho 0 tail 12 room 4
load 0x3ffe8000, len 3168, room 12
tail 4
chksum 0x93
load 0x3ffe8c60, len 4956, room 4
tail 8
chksum 0xbd
csum 0xbd
Fatal exception (0):
epc1=0x40247ce1, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000

This happens over and over until I unplug the board. I'm currently connecting the board to an FTDI USB adapter through a Sparkfun level shifter. Both the level shifter and the USB adapter are known good components.

Any suggestions would be greatly appreciated

- Thu Oct 30, 2014 10:58 pm #2084 Before you try anything else you should try a better power supply. if you feed it under 150ma or so you can see random resets

- Tue Apr 14, 2015 5:23 am #14449 I have the same issue when connecting GPIO2 to a DHT22. REmoving this connection made the ESP booting correct.