ESP8266 Community Forum

I just received a batch of Makerfocus ESP8266 ESP-01S chips purchased from Amazon. They are the 'new' ones with the white screen on the bottom. I have used these in the past and just adjusted the code for the new LED location. With this batch, I can program them just fine, but they don't seem to boot. When i apply power in my fixture, i just get the brief flash of the blue LED and that is it. The first thing my sketch does is light the led so I can tell its booting, i.e. looking for the network. With these new chips, it seems to just hang up and never actually boot. I have tested the same sketch with both and old, and new, Node board without issue. Any ideas on why these are not booting would be appreciated. Thanks.

What does the boot message at 74880 Baud say?

QuickFix wrote:What does the boot message at 74880 Baud say?

ets Jan 8 2013,rst cause:2, boot mode:(3,2)

load 0x4010f000, len 1384, room 16
tail 8
chksum 0xef
csum 0xef
csum err
ets_main.c

tplindley wrote:

QuickFix wrote:What does the boot message at 74880 Baud say?

ets Jan 8 2013,rst cause:2, boot mode:(3,2)

load 0x4010f000, len 1384, room 16
tail 8
chksum 0xef
csum 0xef
csum err
ets_main.c

The working version of these same chips I have displays this:

ets Jan 8 2013,rst cause:2, boot mode:(3,1)

load 0x4010f000, len 1384, room 16
tail 8
chksum 0x2d
csum 0x2d
vbb28d4a3
~ld
␀

By the 'csum err' line, sounds like its throwing an error on the checksum. Is the programming not working correctly? Where can I research these messages?

Thanks!