I use two (serial) Panasonic 18650 NCR18650B Li-ion battery 3.7V with protection PCB 3400mAh.
Simple way

That's what I thought about first.
But if the power is insufficient when booting, the EN is immediately set to L again.
A "flickering" would of course be possible and not desirable.

When I apply a resistor from out to +, I have a hysteresis (non-inverting Schmitt-trigger).

I build a circuit.
If the voltage (Ubat) is to low (adjustable with R4) the EN is L.
V1 (3.3V) is after the step down converter.
It works ^^ Thx TD-er

Is a LMC6482.
But i think, i solve this with ThomasB's "brown out detector".

Good idea.
I still have unused OpAmps.
This allows me to build a Schmitt trigger for the EN.

One way to solve this is to use a brown out detector . This provides a reset after the voltage becomes valid. Same concept as the Power Good ("PWR_OK") signal on a ATX PC power supply. For example: http://www.hnilica.cz/radek/zim/Electronics/Components/Brown-Out_Reset_Circuits.html - Thom...

ATM i use a nodeMCU and give power over 3V pin. Vin is not connected. I know, is not a clean solution
Later i will use a "naked" ESP-12F modul.

No. 3.3V.
5V is very bad for the ESP

Yes. I use a step down converter (7-12V to 3.3V).

German: Hallo Gemeinde Warum bootet der ESP8266 nicht, nachdem die Akkus komplett entladen waren und die Solarpanels wieder Strom liefern? Ich denke, das dies wegen dem langsamen Spannungsanstieg ist. Gibt es einen Trick (wie ein R-C Glied), um das hinzukriegen? Translator: Hello community Why does ...

Update: The blinking LED is a problem from a bad Wlan. Now i installed a repeater. It works perfect. In my language: Die schnell blinkende LED ist tatsächlich ein Problem eines schlechten Wlan Empfangs. Ich habe jetzt einen Wlan Repeater installiert und mein ESP funktioniert seit Stunden perfekt. Au...

Here the main case.
Excuse me for the external batteries ^^
It's still in test phase.

Without "Deckel" and "no deepsleep" it works perfect!
Im Moment läuft es sogar mit "Deckel"!

Yes. I did an upgrade. And disconnected the power manually during the install. My Rules: on System#Wake do gpio,14,1 gpio,13,0 endon On System#Boot do //When the ESP wake up, do timerSet,1,60 //Set Timer 1 for the next event in 60 seconds endon On Rules#Timer=1 do //When Timer1 expires, do if [Wind#...

Problem solved.
However, I had with the 20190803 solved the problem synonymous.
I deleted the mqtt in ioBroker and created new.
Now the newest version is running.
No problems so far.
Thank you very much for your support.

Wow, that's great. Thank you

mega-20190803

My ESP go to deepsleep every 5min. On System#Boot do //When the ESP wake up, do timerSet,1,40 //Set Timer 1 for the next event in 40 seconds endon On Rules#Timer=1 do //When Timer1 expires, do deepsleep,300 //Deepsleep for the next 300 seconds endon But the MQTT server generates strange lines when t...

After 6h it works. hmm

Hi All values works except Luftfeuchtigkeit and Temperatur from Environment - DHT11/12/22 SONOFF2301/7021. This one is 1-wire. The other sensors are I2C. See screenshots. Git Build: mega-20190630 If I delete this sensor in ioBroker, it will reappear automatically a little later. So he is recognized....

Siehe auch:
viewtopic.php?f=6&t=6826

Now i buy other V2 boards from Banggood (see attachement). Wake up work perfect. The LolIn V3 board have this problem (see attachement). The GPIO settings in ESPeasy should not have an effect on the boot from deep sleep. Just to be sure it isn't a hardware issue, you could try an older build, based ...

Hello community My rules: On System#Wake do //When the ESP wake up, do timerSet,1,60 //Set Timer 1 for the next event in 60 seconds endon On Rules#Timer=1 do //When Timer1 expires, do deepsleep,600 //Deepsleep for the next 600 seconds endon After these 600s the "NodeMCU LED (GPIO16)" LED i...

I want to turn on the wifi every 10min for 30s. But if the wind speed is over 5km/h turn on the wifi. My idea: On System#Boot do //When the ESP boots, do timerSet,1,60 //Set Timer 1 for the next event in 60 seconds endon On Rules#Timer=1 do //When Timer1 expires, do modemsleep,1 timerSet,2,600 //Set...

Eyyy, it work. But only after first boot.
Now loop the reset.

Edit:
Now it's ok. I had configure the GPIO-0 as Wake GPIO.
1000x thanks you!!

I have testet with 2018 sources. ....not work

Edit:
Now i compile with 2.4.2 the source ESPEasy_mega-20181231.
The board work not

No chance. I copy the content of lib to libraries, and src renamed to ESPEasy.
I make no modifications.
Compile and upload works.
But the board is not working.
Does anyone have a hint?

Ok. Now the modemsleep works. But is possible to integrate the devices ADS1115, DHT11/12/22 SONOFF2301/7021, BMP085/180 and OpenHAB MQTT controller ? Current go down to 20mA with modemsleep ^^ I need the devices in screenshot. Which source i need for compile tests? 01012019? Edit: Now i have tested ...

Thx.
But ADS1115 works not with this.
Sure, the ESPEasy sources from 20190101 runs. Not ESPEasy sources from 20180101 ?

Hello, for my weatherstation i want to use Modem Sleep instead of the deep Sleep Mode, because i have a rain gauge connected. For this the GPIOs should be active. So is there a way to use the ModemSleep mode with ESP Easy? Yes, the forum search engine shows it immediately. :) https://www.letscontro...

I think, this board is defective.
It wake up after a 2nd impulse on RST.
With only one impulse, it stay in deepsleep.

My english is terrible. So i post here: https://www.esp-forum.de/index.php/foru ... -deepsleep
I'm a Swiss. My language is German. Sorry ^^
Indeed i know Electronics. www.ltspiceusers.ch is my own forum.

Done. But still the same problem
Have I to do some other configurations?
I have the nodeMCU Board.
If I connect the RST directly to ground, the ESP wake up.
The GPIO16 works. When I set GPIO → LED: to GPIO16 the output is 3.1V. Inverted 0.1V
Could it be that an older version of build works better?

Google-Translator: No matter if I enter the deepsleep,30 command in the Rules or directly, the LED on the ESP flashes quickly after 30 seconds, but the ESP remains in sleep mode. The GPIO14 showing the status will then go from 0V to 150mV. That's it. I have to interrupt the supply so that the ESP wo...