ESP12-S and ESP07-S having problems to wake from sleep

[Hasenradball]

Dear Espressif Team,

i used ESP12-F module since years without having prolems getting up from deep sleep.

Now I bought some ESP07-S and ESP12-S modules and connected it with the same external circuit than I did for the ESP12-F since years.
See https://esp8266-01-adapter.de/wp-conten ... ter_v2.pdf

But if I test the deep sleep the chip does not wake up as normal, it seems if woke up it is in bootloader/flash mode.
This behaviour I did not see in the ESP12-F modules before.

My impression is that the S-modules have problems to wake from deep sleep mode.

Dear Espressif Team I need help here.

Best Frank

[lichurbagan]

You may get some help from this thread. https://www.reddit.com/r/esp8266/commen ... eep_sleep/

[Hasenradball]

You may get some help from this thread. https://www.reddit.com/r/esp8266/commen ... eep_sleep/

Probably not the discussion is about the PullUps and PullDown at GPIO 0, 2, 15.
But thats not the problem.
It must be an other issue.

Is there a specification what has to be done for the robust wake from sleep?

[Hasenradball]

Found this post which shows the that the S-modules has a missing resistor:

https://www.esp8266.com/viewtopic.php?f=6&t=17975

Can anybody explain?

[Hasenradball]

Here I did some comparison of different modules:

a) ESP01 - wake OK!

ESP01 OK

20251220_125642_ESP01_wakeOK.png (22.1 KiB) Viewed 6225 times

b) ESP Wemos D1 mini with 12-F module - wake ok:

Wemos D1 mini with old ESPmodule OK

20251220_125320_WemosD1mini_wakeOK.png (20.22 KiB) Viewed 6225 times

c) ESP07-S - wake NOT OK:

ESP07-S NOTOK

20251220_130228_ESP07_S_wakeNotOK.png (20.48 KiB) Viewed 6225 times

[Hasenradball]

Here the 12-S module - wake NOT OK:

ESP12-S NOTOK

20251220_130012_ESP12_S_wakeNotOK.png (22.24 KiB) Viewed 6225 times

[Hasenradball]

It shows the ESP12-S has the shortest pulse of all but also the ESP07-S does not wake up.

It is difficult to extend the pulse with by adding some resisors or else.
So there has been some schematic changes with result is this issues!