Reboot a digital Pin assigned button

Need Help With My Project
1

Hey everybody !

I am using 12 button to turn off 12 relays. It is switch buttons, so they remain OFF unless I push them back to ON.

But having to turn them back to ON position is a bit tricky…

Is there a way, like with Blynk.virtualWrite(V27," "); to turn ON/OFF switches ?

So that I put this code into my setup loop and It will automatically switch all my button to ON when a reboot the ESP ?

Thanks a lot !

2

Yes, you’d write a zero to each switch widget to turn it off.
Doing 12 virtualWrites immediately after each other may cause an issue, so do them in blocks with a short delay between each block.
You’d probably need to do a digitalWrite to each pin as well.

I assume that you’re using an ESP32 so that you have enough pins?

Pete.

1 Like
3

Thanks pete.

Sorry I forgot the most important …

My 12 buttons are linked to Digital Pins. So they cant be changed with a virtualWrite right ?

I am actually using 12 ESP 8266.

4

Are you using 12 different devices, with 12 different Auth codes, in your project?

Pete.

5

Exactly.

But each ESP8266 will do the same thing.

They only deal with one button, always on D0. Only the device target changes.

When I will power off/on the main power supply, all the ESP will turn off, then reboot.

That why I want the setup of each ESP to have something that automatically switch ON all the differents buttons that I could have turn OFF.

So If I do that :

pinMode(16,OUTPUT);
digitalWrite(16,HIGH);

on each of my 12 setup loops codes, all my UI buttons will turn ON a the boot right ?

I also would like them to change color when something else is trigerring (so even if I am not pushing them OFF !). I would like to use Blynk.setProperty, but since its digitals pins buttons, It wont work I guess ?

Thanks again

6

You need to use virtual pins, they give you everything you need.

Pete.

7

But a tiny bit more coding as I expected =p

Lets get to work.

Thanks pete !

8

Not that much more.

GPIO16 (Pin D0 on the NodeMCU) isn’t such a good choice of pin.
If you are able to change it (assuming that its not a pre-built PCB) then there are better choices:

Pete.

9

So its D1 D2 D5 D6 D7. Not a lot left Oo

Thanks pete !