ESP8266 Community Forum

- Fri Dec 07, 2018 9:26 am #79454 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.

- Fri Dec 07, 2018 11:38 am #79455 What does the boot message at 74880 Baud say?

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

- Fri Dec 07, 2018 12:07 pm #79459

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

- Sat Dec 08, 2018 7:54 am #79469

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!