How to avoid the problem with the ESP8266 V3 and the reed switch on pin D8?

Question

Hello
As in the subject, I have a module esp8266 to control a garage door with a reed switch sensor,
everything works as expected until the power goes out :/ and the board does not want to start if it has a high state on the D8 pin (reed switch connected)
Please suggest how to do it differently or how you connect it,

jarekgol · Accepted Answer

boot fails if pulled high .

jarekgol · Accepted Answer

You can connect an led or voltmeter to these others, write some flashing, but with the input mode set and see if maybe changing the mode doesn't work?
Have you got a resistor in there for that reed switch (as a pull-down)?

Well, in situations like this, it's good to fire up a new 'sketch' without the various libraries and check the operation of the ports on it.

szyba20 · Answer

Ehhh... shame on me... , please tell me under which pin it is best to connect it which supports high state ? I have checked D4 D6 D7 and it does not work and I have little to do with esp8266.... and I don't really understand...

jarekgol · Answer

I too have little in common after a few adventures. When I don't need wifi I go for the old AVRs

from this spread it looks like D6 D7 should work, as long as you're not using SPI
Since you're using D and not GPIO designations, I assume some Arduino, write what exactly the board is then maybe someone can tell you more.

szyba20 · Answer

I don't use SPI but I can't drive any other input low or high except D8 :/
I bought the boards from one seller on All signed as esp8266 V3 that's all I know about them

after changing the code the board seems dead on states on other inputs.... I changed to other inputs the same... so probably I do something not as the manufacturer predicted

as for designations I use D because such descriptions have the board to not get lost

in the code gives
- platform: gpio
pin:
number: D8

szyba20 · Answer

I've just come across the same thing ^^ I was looking at a voltage divider that I'm making for another board iii ehh I've been messing around again instead of putting 10k pulled up to GND and seeing what happens then and it will probably work I've been messing around for 2h Thank you for your help I'll check tomorrow to see if it works

@GUTEK@ · Answer

I don't play with the ESP8266 too much, but from what you describe I think you have a NodeMCU v3.
It also has the SD card support pins brought out. What if you used any of them, they seem "more normal" than the basic ones.

These are the ones on the left from GPIO6 to 11:

.

szyba20 · Answer

thanks for your help, I managed by adding 10k on GND relative to the input as a pull-down and everything started and no problems on reset

szyba20 · Answer

as above

[Solved] How to avoid the problem with the ESP8266 V3 and the reed switch on pin D8?

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