switch gpio 0 always high after boot

[grovkillen]

it is working with the resistor
perfect

i am wondering why they sell esp-01s with relais, how can this work?

Don't know really.

[Shardan]

Simple reason: Cost.
It is the cheapest ESP.

[psy0rz]

Which version of ESPEasy are you using? I've tested this with the latest mega and v2.0, and i was able to set the bootstate of GPIO 0 to both low and high. (and it would give the correct signal)

Edwin

[riker1]

Hi
I am using r147 on ESP01 1M
I was not able to flash and boot a V2xx on an ESP-01
it was never starting up right with V2 for me

[riker1]

Hi
is it possible to create a rule for reboot to
set gpio 0 low after startup?

how would a rule loook like?

Thanks

[Micha_he]

It's simple...

Code: Select all

on System#Boot do
	gpio,0,0
endon

[riker1]

ok, perfect, thanks, will check

[riker1]

hi this is working , but will take a will .
so how can I avoid gpio beeing switched after powerup?

rule skips in after reboot, so too late.

setting hardware gpio to input low does not solve it

maybe a resistor?

Thanks T

[grovkillen]

Then you need a physical pull down...?

[riker1]

ok, you mean a resistor between GPIO 0 and GND?

Would 10 kOhm be sufficient?

[grovkillen]

That's what I use...

[Micha_he]

@riker: Are you specifically talking about this relay-modul?

relay_modul.jpg (77.29 KiB) Viewed 21883 times

[riker1]

yes I am
even need a pulldown to boot up the esp-01

[riker1]

That's what I use...

and with this setup after powering up, GPIO 0 stays low?

[grovkillen]

It might flicker, if I remember correctly (only got one ESP-01 running).

[Micha_he]

It works like follow at me:

ESP-01 on ESP-01S relay modul v1.0 with ESPEasy R148.
One resistor 10k between Vcc and CH_PD and one resistor 15k between Vcc and GPIO0 was soldered on the relay-modul.
No flicker, no "1" while or after boot !

esp01s.jpg (8.58 KiB) Viewed 21857 times

hardware.jpg (30.09 KiB) Viewed 21857 times

devices.jpg (17.71 KiB) Viewed 21857 times

rules.jpg (11.59 KiB) Viewed 21857 times

[riker1]

It works like follow at me:

ESP-01 on ESP-01S relay modul v1.0 with ESPEasy R148.
One resistor 10k between Vcc and CH_PD and one resistor 15k between Vcc and GPIO0 was soldered on the relay-modul.
No flicker, no "1" while or after boot !

ok, thanks, will try this.

[riker1]

Hi
where did you get the R148 from?
Only find 147

[Micha_he]

I don't know anymore
Do you think, the R148 make any difference? If you wish, I would attach the R148 here today evening or send it as PM.

E.g. you can download it from here .

[riker1]

E.g. you can download it from here .

thanks.

[nisho]

It works like follow at me:

ESP-01 on ESP-01S relay modul v1.0 with ESPEasy R148.
One resistor 10k between Vcc and CH_PD and one resistor 15k between Vcc and GPIO0 was soldered on the relay-modul.
No flicker, no "1" while or after boot !
esp01s.jpg
hardware.jpg
devices.jpg
rules.jpg

Hey there Micha_he,

Because i didn't have a 15K with me, I tried and put a 10K resistor VCC<>CH_PD & 10K resistor VCC<>GPIO0, but it did not work.
Do you think it is because of the 10K i used and it's necessary to be 15K?

Thanks in advance,

[Micha_he]

Yes maybe. I have tried several values...

Test it, with 4.7k and 10k in series !