LUA to Read a Parameter Value from a Device

[DannyDS 2]

Hi Everyone,

 

I have been adding Fibaro devices for many years in my home and finally have the time to begin some programming of scenes and QA's. I am a newbe in the programming area but very keen to learn.

I would like to read the value of a Fibaro Relay Switch in a QA

The device ID is 240 and the Parameter Value is 17 (Second Channel, time parameter for delay/auto on/off mode) which is 2 byte

I believe to change the value I use this,

 

hub.call(101,"setConfiguration",19,1,30)

where:

101 is the device-id

19 is the parameter to adjust

1 is the byte length

The new value is 30.

 

But I have no idea how to read the existing value?

 

Any help would be greatly appreciated.

 

[Neo Andersson 230]

Please login or register to see this code.

 

Edited May 30, 2024 by Neo Andersson

[DannyDS 2]

Thankyou @Neo Andersson greatly appreciated. Can I ask as a newbie how in a QA I pass the device I’d and parameter into the function and then print the value in the debug window….

[Neo Andersson 230]

8 hours ago, DannyDS said:

Thankyou @Neo Andersson greatly appreciated. Can I ask as a newbie how in a QA I pass the device I’d and parameter into the function and then print the value in the debug window….

 

 

I dont understand the question..What is the goal?

[DannyDS 2]

Hi @Neo Andersson

 

I have a towel rail connected to the relay switch and a QA that has two buttons on it where i change my house mode to 'Summer' or 'Winter', that is how we are feeling with the weather and not the exact summer or winter weather.

I have a delayed off parameter for the towel rail that I want to read the value of the parameter and display the value (that I will convert from seconds to hours) on a label in the QA. A button sets the value.

 

Many thanks for your help!

Edited May 30, 2024 by DannyDS

[Neo Andersson 230]

19 hours ago, DannyDS said:

Hi @Neo Andersson

 

I have a towel rail connected to the relay switch and a QA that has two buttons on it where i change my house mode to 'Summer' or 'Winter', that is how we are feeling with the weather and not the exact summer or winter weather.

I have a delayed off parameter for the towel rail that I want to read the value of the parameter and display the value (that I will convert from seconds to hours) on a label in the QA. A button sets the value.

 

Many thanks for your help!

I have showed you the function that can be used for reading a device parameter.. Used that function to read the auto off parameter of the device, if this is your intention.

So use it. Read the parameter and print the value..

 

Please login or register to see this code.

 

[MiZ 0]

I also try to read the parameters from my devices, but I try to loop and get all devices.

 

    local device=api.get("/devices/")

    print(#device.." devices found!")

    for j = 1, #device do

        print(j.." - Id:"..device[j].id.." Name:"..device[j].name)

        local dev = api.get("/devices/"..device[j].id)

        for key,param in pairs(dev.properties.parameters) do

            print(param.id.."-"..param.value)

        end

    end

 

 

Due to my lack in LUA experience, I encounter two issues:

1. For some deviceIDs the loop crashes with an errormessage "bad argument #1 to 'for iterator' (table expected, got nil)"?

2. For none of the devices the code goes into the for-loop and prints the parameter-data?

 

I hope any of you guys can help me out here!?

[MiZ 0]

Anyone?

[cag014 731]

On 6/4/2024 at 3:13 PM, MiZ said:

I also try to read the parameters from my devices, but I try to loop and get all devices.

 

    local device=api.get("/devices/")

    print(#device.." devices found!")

    for j = 1, #device do

        print(j.." - Id:"..device[j].id.." Name:"..device[j].name)

        local dev = api.get("/devices/"..device[j].id)

        for key,param in pairs(dev.properties.parameters) do

            print(param.id.."-"..param.value)

        end

    end

 

 

Due to my lack in LUA experience, I encounter two issues:

1. For some deviceIDs the loop crashes with an errormessage "bad argument #1 to 'for iterator' (table expected, got nil)"?

2. For none of the devices the code goes into the for-loop and prints the parameter-data?

 

I hope any of you guys can help me out here!?

Some devices don't have parameters, that is why you get the error message.

What exactly you're trying to read? Just for a specific device?

[MiZ 0]

For the moment I just want to understand the build up. How can I check if parameters are present or not?

[SmartHomeEddy 1,005]

If you request the parameters and you get the nil value back, they aren't there. You can check on the nil value. 

And you can't loop through device number with +1, because the device numbers don't have to be sequential. 

[MiZ 0]

Does anybody have an idea on what the second point above is due to?

            2. For none of the devices the code goes into the for-loop and prints the parameter-data?

 

It is probably my LUA-unexperience...

[Neo Andersson 230]

As guys wrote you,...first check prameters table against nil value, and upon that continue..

Try this code. I did not try it, but should work. But dont forget, if you have a lot of devices, this process might take quite a bit of time.

 

Please login or register to see this code.

 

 

Edited September 11, 2024 by Neo Andersson

[MiZ 0]

But this code still doesn't give me any parameter values?? It just gives me all Ids and Names.

Edited September 11, 2024 by MiZ

[Neo Andersson 230]

27 minutes ago, Neo Andersson said:

As guys wrote you,...first check prameters table against nil value, and upon that continue..

Try this code. I did not try it, but should work. But dont forget, if you have a lot of devices, this process might take quite a bit of time.

 

Please login or register to see this code.

 

Wait i will check it

[Neo Andersson 230]

Please login or register to see this code.

 

[MiZ 0]

Still no parameters on my side!? Does this code work for you?

[Neo Andersson 230]

1 minute ago, MiZ said:

Still no parameters on my side!? Does this code work for you?

yes, just roll through the devices..as not all of them have parameters..

 

Please login or register to see this image.

/monthly_2024_09/image.png.ecdac47903875939656d48b82200813a.png" />

Edited September 11, 2024 by Neo Andersson

[MiZ 0]

Strange, I get nothing!

 

I see you run it in a QA, could that be a difference to my scene?

[Neo Andersson 230]

1 minute ago, Neo Andersson said:

yes, just roll through the devices..as not all of them have parameters..

 

Please login or register to see this link.

 

change to this for better visibility

 

Please login or register to see this code.

 

1 minute ago, MiZ said:

Strange, I get nothing!

 

I see you run it in a QA, could that be a difference to my scene?

I dont think so...I would be surprise,,I am not using scenes at all, so i cant tell you for sure..I have very rarly used scenes..but i doubt it is not working in scenes,,

Try in a quickapp

[MiZ 0]

No difference in QA. Still no parameters printed?? Idea?