Unable to wake up ESP8266 after Deep Sleep

[Noblast]

Hello Spiro,

yes, I always started the log after a reset, this is the boot process until the first deep sleep.

I got the information about the resistor from the following link:

ESP.deepSleep hangs after wakeup - ESP12F (Working on older chips) #6007

Here a bridge is placed from the 3.3 volt pin to the SDD0 pin:

Greetings
the Noblast

[Spiro]

I meant about suppyling the board from an external 3.3v to the 3.3v pin and not having a usb plugged in.

[Noblast]

Hi Spiro,

sorry for the misunderstanding. I powered ist in different ways. First I Powered ist like your sketch with an Step Down converter. It Converts the 12 V from my car to the 3.3 V. I have also tried it with a capacitor.

Then I tried it with the USB voltage. That didn’t make any difference.

For the last test, I only worked with the USB voltage.

Greetings
the Noblast

[Mahko_Mahko]

What is this witchcraft?

[Spiro]

LOL. Now you see it , now you don’t . The camera never lies.
Still can’t work out why this doesn’t wake up. I’ve never had problem waking D1 mini waking up. I’ve mostly used ESP12F with cells (and solar panel) to avoid wasting energy on a 5v regulator. I must be assuming something that’s wrong.

[Mahko_Mahko]

Personally I just go for esp32’s for deep sleep projects.

More features and less hassle.

…but that’s not the topic…

[stevemann (Stephen Mann (YAML-challenged))]

As I said before:

@stevemann

SDD0 (GPIO7) is connected to the flash chip, so I don’t see how this could possibly have any effect.

Are you still running API and MQTT at the same time? In my experience this never works well.

[Noblast]

Hello Stevemann,

I have not yet made any changes to the boards that are already running and the API and MQTT are running in parallel. And it is running.

On the boards where I have the problems, I have not been able to get them to run either when I have only run API or MQTT. Unfortunately, this made no difference, even if I extended the runtime.

I might try to change the way, how I send them to deep sleep.

thanks,
the Noblast

[Mahko_Mahko]

Do you know if you have clones or originals?

Some clones can be poor quality.

I don’t know much about AZ-Delivery.

What's your favourite ESP32 board? (# Best, good, cheap, quality, reliable)

All the Lilygo stuff is open source and their designs are on github. I had a look at some of them and they appear to be really good (500mA 3.3v regulator on the one you linked to). Just make sure you buy from their official Aliexpress store. The clones cannot be guaranteed to be using the the same quality components. Same goes for the LOLIN D1 mini. Buy from the official LOLIN store, not the clones. The clones are cheaper because they use inferior components and the reliability suffers. MH-ET …

[Spiro]

I think that isnt a legit AZ delivery as no branding.

[stevemann (Stephen Mann (YAML-challenged))]

@Mahko_Mahko

Do you know if you have clones or originals?

Some clones can be poor quality.

Who is the original?
Expressif publishes schematics and PC board files for ANYONE to make development boards. So, by this logic they are ALL clones.

I have purchased dozens of ESP development boards from Amazon, eBay, AliExpress and Expressif. I have only experienced one DOA board, and even then I can’t be sure that I didn’t smoke it.

[Mahko_Mahko]

We’ve discussed this before, @stevemann. The term “clone” may not be the best choice of word. I use it as shorthand (a term I picked up from the linked thread), but I appreciate it might be misleading. I’ll try to remember to avoid using it in the future to avoid debate and the potential for being misleading.

Previously, I bought the cheapest options until I started getting weird reliability issues (broadly like the current one, which is what prompted me to make the connections and mention it, especially since other common causes seem to have been explored), also prompting the creation of the thread I mentioned.

If you haven’t had issues with inexpensive purchases, that’s great – no need to change I guess. Personally, I switched to higher-quality boards and now encounter fewer problems, which works for me.

I primarily wanted to highlight that some cheaper boards have lower-quality components and may have reliability issues.

[DBT85 (Darren Thomas)]

@Noblast

I have read in another forum that some have solved it by soldering a 10 kOhm resistor between 3.3V and SDD0. I will try this today

Greetings the Noblast

Can I just say thank you for this. I have 2 NodeMCU 8266’s that were refusing to wake from deep sleep and this was the cure. Don’t know why or how but I’ll take it. 10k resistor between 3.3v and S0 on my board.

[Gary99 (Gary Charlton)]

Hi there,
Just thought I would add my findings into the No recovery from Deep sleep.
I purchased 4 Ali express ESP12E (same module as the Wemos D1) and all 4 of them failed to wake from deep sleep with known working code.
Being in a position to investigate this I first took the EMI cover off the module and did a thourough check against the Expressif data sheet for ESP8266EX.
Could not find any problems. RTC wake up pulse driving the RST pin no issues.
So I purchased some RAW ESP8266ex chips from Digikey and replaced the onboard CPU. Still no luck. The only thing it could now be was the flash memory chip or 26Mhz crystal. Check the crystal on a scope. Perfect.
Finally purchased four replacement 1Mbit flash chips from Digikey.
Bingo. Worked first time. Changed the other 3 flash chips and now they are all working.

To conclude…It appears that cheap flash chips load the serial data bus when the CPU boots from DeepSleep Wake up. It cant load the firmware and goes into “zombie mode”
pulling about 33mA current. A second reset pulse usually starts the system as the bus is already powerd up.

[m039 (Dmitry Mozgin)]

Thank you, I’ve replaced the flash chip on my Wemos D1 and Deep Sleep works now.