Raspberry, domoticz physical and remote switches, and GPIO pin extension

Hello,

There are many instructions on the network how to control the relay, let's turn on the lamp with domoticz and it actually works after configuration . My question is how do I add a doorbell switch to all of this? I do not know how to set the GPIO pin in domoticz as the input and connect it in the program so that the switch can be turned on both with the bell switch and remotely with domoticz.
I will add that I want to use a raspberry to control lighting at home and this is where another question arises. There are too few GPIO pins in raspberry for me to use them as inputs and outputs for that lighting. Is it enough to buy an external extension of the GPIO pins to solve this problem and it will be possible to configure it so that in domoticz these pins are also visible, or do I need to connect it all, for example, under the arduinono mega (here there are enough pins and the control is currently working) and connect them with raspberry using mysensors? Let me add that I would prefer to omit the arduino entirely if it was possible ... Thanks in advance for your help.

I am looking for exactly the same everywhere a lot of information how to turn on the relay but from the domoticz panel. It would be a bit nonsense to go everywhere with a smartphone to turn on the light, and what if the battery dies?
Has anyone solved this problem? how to configure it so that the lighting works remotely and via the button

And isn't it better to use esp8266 to control the light and only have domoticz on rpi?

You need some hardware to make it work via a button. I have it on esp8266 and more specifically on the Wemos D1 Mini. In the light switch box I have a self-produced module with esp and relay and an input for connecting the switch. I replaced the ordinary bistable switch with a monostable one (eg "Bell") and after giving the impulse, the state of the relay changes to the opposite, turning off and on the light, and at the same time I can also control it from the domotics. ESPEasy uploaded to esp8266.

Greetings

Arek1984 wrote:

And isn't it better to use esp8266 to control the light and only have domoticz on rpi?

hmm sure and better On the other hand, to have 20 or more esp, does it not send a signal? all via wifi.
The creators of domoticza made the program available for free, so you have to take what is. Maybe it's better to buy an arduino and expand the ports, but the question is whether it works with fakes ch340?

[quote = "neo_84"]

Arek1984 wrote:

.... Maybe it's better to buy an arduino and expand the ports, but the question is whether it works with fakes ch340?

How does this affect the operation of domotics? ch340 is pretty good chip, serial-> usb converter like any other.

Pos

My friend. You set yourself some GPIO as input by editing the file in the console:


At the end you add e.g. for pin 27:


You restart Domoticz.

Then in the panel you add the switch as 'Contact' and below in the list you select GPIO. If you correctly edited domoticz.sh, you should be able to choose pin 27 as INPUT. You add a device and by shorting the pin to 5V, the arrows on the screen should turn red (the reaction of the program works with a slight delay).

I will hook to the topic, because I want to start the option of adding switches in Domoticz by activating the GPIO I / O and something is not working for me and I do not know why. I added these commands in the domoticz.sh file as it is given in this thread and when I want to activate the switch in domoticz, in the GPIO field I have the GPIO INIT ERROR message instead of the GPIO pin address to choose from. Anyone can tell what's wrong?

I will answer myself because I have already fought the problem. Wiring that is uploaded is ver2.5 and the new Raspberry Pi 4 B raspberry requires uploading the 2.52 wiring version and then it works as it should.
It may be useful to someone

Hello,

I wanted to connect to the topic:

I wanted to connect the lighting switch on the terrace with the domotic via WIFI and the MQTT protocol.
I connected the usual bistable switch via sonoff mini (with the ESP Easy Mega v.20200328 soft loaded) according to the diagram.
The problem is that it works from domotics, but the physical switch does not, how to fix it?

In sonoff: I set GPIO 0 to the physical switch, and GPIO12 to the relay as below.


BUTTON:


RELAY:


DOMOTICZ:



Thanks in advance for your help

Set BUTTON: IDX = 8 Send To Controler.

With your settings, you send the switch state in vain.
If that doesn't work, create a "dummy" switch and assign its index.
Associate the "dummy" state with Taras

The physical button should be "bell" because there will be times when you will have to switch it twice

I made changes as posted but it didn't help.

A friend helped me solve the mystery.

The problem was the wrong assignment of the GPIO.
After assigning the BUTTON to the GPIO4, the physical and domotic switch works.

Thanks for the help.
best regards

I have one more question about the switch, not related directly to the Raspberry, but more to the sonof and the switch itself.
Namely, the switch from the Simon basic series with LED backlight works as it should, except ..... backlight (in the normal system, the backlight turns on when the light on the terrace is turned off, it goes out when it is turned on).
I understand that at the moment the switch itself is not plugged into the 230v circuit, but only gives an impulse to the sonoff when turned on and off.
I would like the visible backlight of the switch itself. During the day I will not know if the light is on on the terrace - and I would like to be able to judge it with one glance at the switch, the question is how to push it / bypass the problem so that the backlight in the switch works?
Someone struggled with it and solved the problem.
Thanks in advance for your help.