RF wall mounted light switch [discussion]

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grovkillen
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RF wall mounted light switch [discussion]

#1 Post by grovkillen » 19 Jul 2018, 21:15

I'm thinking about the possibility to have simple RF light switches that is operated by coin cells or even the tactile energy (not sure if that's the correct terminology, but the energy harvested from the push of a button). The idea would be to have these wall switches send a RF signal to one or many ESP Easy units that have the corresponding RF receiver attached to it. It would be interpreted by ESP Easy as any switch and act upon the signal as such.

So my question, have anyone seen such hardware being sold. I mean without the bulky relays and enclosures that I see in this Aliexpress unit (link here). It's almost exactly what I'm looking for except that the relays are not needed, only the signal to my ESP.

The discussion. Is this something more people would be interested in or is it only me? I could then approach a manufacturer and suggest them to strip one down and sell.
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budman1758
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Re: RF wall mounted light switch [discussion]

#2 Post by budman1758 » 19 Jul 2018, 22:49

Sounds like a great idea to me!! :mrgreen:
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Re: RF wall mounted light switch [discussion]

#3 Post by HomeJCL » 20 Jul 2018, 08:22

To recap a button to push down that would generate energy ?

You would need a button to be pushed, and if you talk harvesting you will not need your button cell, or do you mean a super cap to store ?

I can imagine that a mechanically leveraged solution could liberated energy, as in some watches from Seiko and others. But what would be the « harvest » of one push. Anyway, I think that one of the leader on the market of such generators is Swedish ...

I think the idea is top but at this stage I don’t see how this would be feasible, I think a naked ESP on a coin cell could fit the bill.
Belgium and land of ESP ... counting :D

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Re: RF wall mounted light switch [discussion]

#4 Post by grovkillen » 20 Jul 2018, 08:48

Don't get hung up on the energy idea. I mean a nice looking remote that can send a RF signal to our ESP. I don't need a ESP to be behind the switch since what I want is a input button only. The closes ESP can broadcast the input to the rest of the house's ESP units. So essentially, a wireless good looking button that can easily be mounted on the wall making it look like a light switch.
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Re: RF wall mounted light switch [discussion]

#5 Post by moebius » 20 Jul 2018, 08:50

Enocean builds this kind of switches - powered piezoelectric. And there is also a gateway for raspberries.

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Re: RF wall mounted light switch [discussion]

#6 Post by grovkillen » 20 Jul 2018, 09:06

Thanks, they are sold under the name NodOn it seems.
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Re: RF wall mounted light switch [discussion]

#7 Post by wim16 » 20 Jul 2018, 09:50

grovkillen wrote:
20 Jul 2018, 08:48
So essentially, a wireless good looking button that can easily be mounted on the wall making it look like a light switch.
I use one of these (dutch): https://www.klikaanklikuit.nl/nl/awst-8 ... elaar.html
It's powered by a CR2032 battery.

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Re: RF wall mounted light switch [discussion]

#8 Post by grovkillen » 20 Jul 2018, 10:16

wim16 wrote:
20 Jul 2018, 09:50
grovkillen wrote:
20 Jul 2018, 08:48
So essentially, a wireless good looking button that can easily be mounted on the wall making it look like a light switch.
I use one of these (dutch): https://www.klikaanklikuit.nl/nl/awst-8 ... elaar.html
It's powered by a CR2032 battery.
What circuit on the receiving end?
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Re: RF wall mounted light switch [discussion]

#9 Post by ManS-H » 20 Jul 2018, 10:47

grovkillen wrote:
20 Jul 2018, 10:16
wim16 wrote:
20 Jul 2018, 09:50
grovkillen wrote:
20 Jul 2018, 08:48
So essentially, a wireless good looking button that can easily be mounted on the wall making it look like a light switch.
I use one of these (dutch): https://www.klikaanklikuit.nl/nl/awst-8 ... elaar.html
It's powered by a CR2032 battery.
What circuit on the receiving end?
I used for the "klikaanklikuit" ACD-3500 Stopcontact Schakelaar (3500W) the RFXCOM - RFXtrx433 USB 433.92MHz Transceiver
But i like your idea.

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Re: RF wall mounted light switch [discussion]

#10 Post by wim16 » 20 Jul 2018, 10:51

I use an RFLink (Arduino) connected to Domoticz through USB because I have more KaKu devices.
I think there is also a KaKu plugin for EspEasy.

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Re: RF wall mounted light switch [discussion]

#11 Post by grovkillen » 20 Jul 2018, 11:25

Thanks for all the feedback! I'm still trying to get a 1-1 solution without gateways etc.
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Re: RF wall mounted light switch [discussion]

#12 Post by moebius » 20 Jul 2018, 12:09

trying to get a 1-1 solution without gateways
This is imho not possible, cause the esp cant receive the rf signals from the switches without additional hardware (and this module is called "gateway" https://www.elv.at/raspberry-pi-enocean-modul.html)

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Re: RF wall mounted light switch [discussion]

#13 Post by grovkillen » 20 Jul 2018, 12:20

I know, the remote control wall switch would also come with bare receiving circuits that would output 3.3V on one pin. Acting like any other switch input as far as the ESP Easy know.
Last edited by grovkillen on 20 Jul 2018, 12:26, edited 1 time in total.
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Re: RF wall mounted light switch [discussion]

#14 Post by grovkillen » 20 Jul 2018, 12:25

See attached picture, the receiver units don't need to be enclosed relays. So strip these down and you got what I want.
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ESP Easy Flasher [flash tool and wifi setup at flash time]
ESP Easy Webdumper [easy screendumping of your units]
ESP Easy Netscan [find units]
Official shop: https://firstbyte.shop/
Sponsor ESP Easy, we need you :idea: :idea: :idea:

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Re: RF wall mounted light switch [discussion]

#15 Post by moebius » 20 Jul 2018, 12:39

So you want to use n receivers for n switches instead of only one rf gateway module for all switches?
Then you would need an esp on every receiver location.

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Re: RF wall mounted light switch [discussion]

#16 Post by grovkillen » 20 Jul 2018, 12:47

No I would not, only one esp would actually receive the RF signal. Then it would publish a MQTT message to the rest of the units.

I'm looking for something like this: http://s.click.aliexpress.com/e/c2Hkbfc4 but with a nice looking wall switch. I would like a kit, don't have the money to just buy to try in the dark.
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Re: RF wall mounted light switch [discussion]

#17 Post by grovkillen » 20 Jul 2018, 12:52

I guess the best would be a i2c receiver that would just publish whatever signal it received, only two pins for multiple switches, but I think that's asking too much as you want the ESP closest to the wall switch to receive the RF. And multiple switches around the house can send to its closest ESP. I don't think a gateway covering the entire house is needed.
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Re: RF wall mounted light switch [discussion]

#18 Post by wim16 » 20 Jul 2018, 12:55

With the Kaku plugin you only need a rf-receiver attached to ESP.
http://www.letscontrolit.com/forum/viewtopic.php?t=2032

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Re: RF wall mounted light switch [discussion]

#19 Post by grovkillen » 20 Jul 2018, 13:00

wim16 wrote:
20 Jul 2018, 12:55
With the Kaku plugin you only need a rf-receiver attached to ESP.
http://www.letscontrolit.com/forum/viewtopic.php?t=2032
Great! I will try that. Thanks for the pointers.
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