[Solved] Sonoff Basic R3 & TH10 Relay Behavior During Power-Up: GPIO12 Concerns

Welcome,

I have a question for owners of:
sonoff basic R3
sonoff TH10/TH16

Doesn't the relay momentarily switch on during power-up?
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On the schematic for TH10 I see that GPIO12 is used (it is weakly "pulled up" to high state but on the schematic there is a resistor to ground and I wonder if this compensates for the instability of this pin during reset and as a result the relay will not be momentarily switched on.

Why do I have this suspicion: I'm playing with the cheapest ESP-01 + relay and I can see that it turns the relay on momentarily every time (another thing is that it uses GPIO0 - I know, I know it's the wrong pin but I bought such a module by accident).
Someone make a sacrifice and gather some information:
https://www.mjt.me.uk/posts/esp8266-gpio-deep-sleep-and-reset/

Briefly - I use TH16 - nothing like this occurs.

Thank you for sharing your experience.

I am not questioning the answers.

I am asking out of curiosity to learn something: how did my colleague verify that the power supply was not switched on for a moment (reset takes about 300ms)?

Why the question: in my original application, the ESP-01/Transmitter simulates a short-lived activation of the remote control for the gate - so any pulse (the one unnecessary at reset too) is easily detectable because the gate will operate.

In my case the TH16 controls the circulation pump.
I infer from this that I can't hear the relay.
I admit that I haven't delved into this specifically as in my application it doesn't matter - the power supply is non-stop and on any return of power the TH16 runs on a schedule. This is adjustable.

Yes, right. I've been working on it this morning and you can actually hear the relay crackle for a moment.

I bought a sonoff TH10. I loaded the ESPEasy R120.
Stably maintains the pin state - does not switch the receiver on accidentally.
Topic closed.

I bought a sonoff TH10. I loaded the ESPEasy R120.
Stably maintains the pin state - does not switch the receiver on accidentally.
Topic closed.

Added after 56 [seconds]: .

Tests indicate stanile operation of sonoff th10 during reset.