Integrate Digital Doorbell - Vimar ELVOX K40910

Hardware
1

Hi,

Does anyone know if is possible to integrate this doorbell into Home Assistant using for instance ESP8266 or reading the BUS channel of the Display?

https://www.vimar.com/en/int/catalog/product/index/code/K40910

Any ideas at least to know when someone is at the door?

Regards,
Nuno

2

Any idea please?

3

I have this one too, i would love to make something like that

4

Hi Filipe,

I ended up doing a custom voltage reading using Wemo D1 Mini and ESPHOME…

Now i’m able to see when the Video Monitor is ON and send a notification to my devices…

I can try to guide you if you have some electronics knowledge…

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Used the 5V to power up the Wemo and the output from 1 of the other 3pins to get the voltage. You should use a voltage divider to avoid burn your wemo since it give +3.3v when screen is on and 1.3 when is off… I used 2x 1k resistor…now give 0.09 and 0.27v.

ESPHOME:
sensor:

  • platform: adc
    pin: A0
    name: “Doorbell Voltage”
    id: doorbell_voltage
    update_interval: 5s

binary_sensor:

  • platform: template
    name: “Doorbell Status”
    id: doorbell_status
    lambda: |-
    if (id(doorbell_voltage).state > 0.15) {
    return true;
    } else {
    return false;
    }
2 Likes
5

Wow! Thanks!

6

Hi Nuno,

Do you think it is possible to use similar system to send the pedestrian gate opening command to the bus?

Thank you,
Antonello

7

Hi aalonzi,

Think we can’t communicate with BUS directly using this method… to open the pedestrian gate you can try other possibility like sonoff basic adjusted to send the signal directly to the lock. But this requires some knowledge.

Regards,
Nuno

8

Thank you for reply.

The simplier solution is to use a shelly or sonoff.

See you

9

Dear @xNuno ,
may I ask you more details on how to connect the wemos?

I see 4 pins on the back of the main unit:

  • 24v
  • gnd
  • bus+
  • bus-

Do you use 24v and gnd to power up the wemos (using some down stepper?).
Which pin do you use to read the current voltage? bus+?

10

Hi @mr2c12 ,

Look at the red wire on the top of the image… you have 5v there…

image
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11

Hi thank you for sharing your work.
Please can you explain me better where did you measure the voltage that let you understand if monitor is on!?

Thank you so much

12

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SC first pin of those 3, yellow wire

13

Thanks for answer.
So in this way you have the same voltage also if you turn on the screen?

14

To power up the WeMos check the other side… You have VCC and GND. Red and Black wires.

15

Ok thanks but how do you understand when the screen goes on for someone who ring the doorbell or if you turn on screen?

16

That’s not possible to detect with this setup… If screen goes on is the same as someone ring the doorbell.

17

Ok I understand.
On my monitor I have different situation, I not find SC one…

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18

Measure those you have and see if any of them change when monitor goes on or when someone rings.

19

Ok I will try.
Thanks

20

Finally I make it with a simple photoresistor. I put it on the back right bottom where there is some holes for speaker and when the monitor turn on some light come out.
I not want to loose warranty by soldering wires on it.

Thank you to all