Switch (Incoming)

Setup, Configuration and Use Beginners
1

Hello,

I’m trying the following:
A ESP8266 with a capacitive touch sensor sends a MQTT message, for example a “1” when Button Number 1 is pressed.

How can i define the item? When the switch is already on, it should turn off when it’s pressed.

2

Do I understand right, the switch shall change amongON and OFF at every input?

3

Yes

4

The question is: which Item? Given two Items

Switch myMQTTswitch1 "Switch 1 [%s]" {mqtt="<[mosquitto:topic/of/button/1:state:MAP(mqtt.map)]"}
Switch myToggleLight "Toggle Light [%s]" {...}

and the mqtt.map:

NULL=NULL
1=ON
0=OFF
ON=1
OFF=0

you would need a rule to do the toggle:

rule "toggle light"
when
    Item myMQTTswitch1 received command
then
    myToggleLight.sendCommand(if(myToggleLight.state == ON) OFF else ON)
end
5

Thank you, i’ll try this.

Where can i find the mqtt.map file?

6

You will have to create it by yourself. You will need to install the MAP Transformation service. The file has to be in ./transformations/

In fact, I think it would be easier to define the first Item as a string:

String myMQTTswitch1 "Switch 1 [%s]" {mqtt="<[mosquitto:topic/of/button/1:state:default]"}

and to use another rule instead:

rule "toggle light"
when
    Item myMQTTswitch1 received command
then
    if (myMQTTswitch1.state == "1")
        myToggleLight.sendCommand(if(myToggleLight.state == ON) OFF else ON)
end
7

Thank you.

But it’s not working. The log says myMQTTswitch1 changed from NULL to 1, but then the switch does not change the state anymore. (Sending a 2 with a other button changes the state of this item from 1 to 2…)

Also the light is not turned on/off…

Item File:

String myMQTTswitch1 "Switch 1 [%s]" {mqtt="<[broker:/max/touch/one:state:default]"}
Switch myToggleLight "Toggle Light [%s]" {mqtt=">[broker:/max/light/bed:command:ON:1],>[broker:/max/light/bed:command:OFF:0]"}

Rule File:

rule "toggle light"
when
    Item myMQTTswitch1 received command
then
    if (myMQTTswitch1.state == "1")
        myToggleLight.sendCommand(if(myToggleLight.state == ON) OFF else ON)
end

Ideas?

8

Ah. Maybe received command is not the right trigger. Please try
Item myMQTTswitch1 received update
instead.

9

Works! Thank you!

10

As you get different messages from the different buttons, you could use the same rule to use the other buttons as well:

rule "toggle lights"
when
    Item myMQTTswitch1 received update
then
    if (myMQTTswitch1.state == "1")
        myToggleLight.sendCommand(if(myToggleLight.state == ON) OFF else ON)
    else if (myMQTTswitch1.state == "2")
        myToggleLight2.sendCommand(if(myToggleLight.state == ON) OFF else ON)
    else if (myMQTTswitch1.state == "3")
        myToggleLight3.sendCommand(if(myToggleLight.state == ON) OFF else ON)
...
end
1 Like
11

@max2 what capacitive switch are you using?

12

I’m using TTP223’s
(https://www.ebay.de/itm/10Stks-TTP223-Touch-Key-Module-Capacitive-Settable-Self-lock-No-lock-Switch-NEU/123142780725)

13

Thx