I'm blown away

[MakerMeik]

I'm totally blown away by how far you've pushed this project in the meantime. Unbelievable!
I just read a comment from another viewer of my - now obviously outdated - video. He pointed out to me that it is possible to put the ESP into an even deeper sleep state:
https://www.youtube.com/watch?v=n_A_8Y4xNx8

In fact, I would go even further in the meantime and try to switch off the ESP completely during the idle phases. Maybe you already know the principle of latch circuits:
https://youtu.be/Er8fSoeaZD0

However, I am not sure whether this is compatible with ESP-now.

If my estimation is correct, it should even be possible to operate the window sensors for several years with only one coin cell.

If you implement this and actually open a Tindie store, I want 30% of your revenues as soon as you have turned over more than 1 million EUR with it 😆

I am totally happy about what you are doing. For this alone, the effort for the video was already 100% worth it.
Once you start transferring the millions, of course, it pays even more 😂

[gadjet]

Thanks for your kind comments, if I earn millions I would happily pass some your way 😉
I was already thinking of a tindie account to sell off spare pcbs.

I'm currently working on a monostable multivibrator circuit to control the enable pin on an LDO to switch the power on off completely as you mentioned, this is to create a multi button controller that can wake up the esp until the message has been transmitted.
I might have made it to complex maybe the simple latch circuit will do.

[gadjet]

One thing I'm concerned about with the latch circuiy is how long the button needs to be pressed for, if the ESP takes more than around 200mS to hold on the latch then the user might not press long enough, with the monostable it should only require a very short button press.

[gadjet]

Also the latch circuit wouldn't be suitable for a door sensor as the switch will always be in one state or another, the latch circuit is ideal to wake up a circuit for a transient input like a button but no for this particular requirement where the input could remain high or low for a long period of time.

You could look at extending the time constant for the current logic circuit and inverting the output so that you get a long enough pulse to enable an LDO (SPX3819) long enough for the ESP-NOW message packet to be transmitted 200 - 5000mS.
Also tie the enable pin to 3.3V, yo may need a cap to ground as well to delay startup depending on how long the voltage supply takes to stablise.