TCP&UDP Binding -

Add-ons Bindings
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1

Running openHABian 1.5 on RaspberryPi 2.
I have a (semi-)domotica system at home, basically some relays with IP-adres and 24 exits to put some lights on/off. The relay listen so a simple telegram send with UDP-protocol.

I have TCP/UDP binding, Map transform binding installed. I also created an udp.cfg file with only “udp:updatewithresponse=true” and udp:port:1001 in it.

To send an ON/OFF command for a Switch item, I have the following configs (just some examples):

.items file:

Switch  GF_Berging_Licht  "Licht Berging"   <light> (Home, GF, GF_Berging) [ "Lighting" ] {udp=">[ON:10.10.1.20:1001:'MAP(GF_Berging_Licht.map)'] >[OFF:10.10.1.20:1001:'MAP(GF_Berging_Licht.map)']"}
Switch  GF_Terras_Licht  "Licht Terras"  <light> (Home, OUT, GF_Terras)  [ "Lighting" ]  {udp=">[ON:10.10.1.20:1001:'MAP(GF_Terras_Licht.map)'] >[OFF:10.10.1.20:1001:'MAP(GF_Terras_Licht.map)']"}
Switch  GF_Wasruimte_Licht "Licht Wasruimte" <light> (Home, GF, GF_Wasruimte) [ "Lighting" ] {udp=">[ON:10.10.1.20:1001:'MAP(GF_Wasruimte_Licht.map)'] >[OFF:10.10.1.20:1001:'MAP(GF_Wasruimte_Licht.map)']"}

GF_Berging_Licht.map:

ON=S0000
OFF=C0000

As you can see, I have to send following telegram: Sxy00 to put the lights ON. Cxy00 to put the lights OFF where xy is the relais exit (00 till 23).

Now, I also have some dimmer relais, where I have to send following command to set the dimmer: S0bc1001, where bc is the DIM percentage.

I basically don’t know how to put the percentage value in the command tot send it to my relay.
Can someone get me started in this one please?

Thx!

2

Think I’d use a javascript transform to format the supplied number into 2? digits, and insert in output string.

That should also allow to intercept commands ON and OFF and convert to numeric

3

Thx for the reply @rossko57!
Is it perhaps possible to give some more details on this one? :wink:

Thank you!

4

example of a javascript that takes a number, well, a numeric string really, and produces a string output around it. Your need should be much simpler, but all the techniques you need are there.

1 Like
5

Thank you @rossko57!

I managed to do it like this:

Item file:

Dimmer  GF_Living_Zitplaats_Licht   "Zitplaats Licht"   <sofa>    (Home, GF, GF_Living)  [ "Lighting" ] { udp=">[*:10.10.1.22:1001:'JS(GF_Living_Zitplaats_Licht.js)']" }

Transform file “GF_Living_Zitplaats_Licht.js”: (according to the documentation I have to send 99 when 100 )

(function(i) {
	if(i==100)
		i=99;
	
	if(i<10)
		i="0"+i;
    var result="S3"+i+"1001";
    return result;
})(input)

Since I get an update from the relay for every string I send, I now get some warnings in the logs:

09:17:17.583 [INFO ] [smarthome.event.ItemCommandEvent     ] - Item 'GF_Living_Zitplaats_Licht' received command 18
09:17:17.605 [INFO ] [smarthome.event.ItemStateChangedEvent] - GF_Living_Zitplaats_Licht changed from 32 to 18
09:17:18.015 [WARN ] [ding.tcp.protocol.internal.UDPBinding] - Cannot parse input I0142318 to match command * on item GF_Living_Zitplaats_Licht

It cannot parse the input “I0142318”: This is always the same string I get back, where the last two values match the dim percentage I send. I should match it to my item GF_Living_Zitplaats_Licht because there are other ways to set the lights (like actual switch).
So the first thing I suppose is to capture the string in an item and then parse is with some rule?

I created an item to capture the string:

String  Incoming_UDP     "Imcoming UDP[%s]"              { udp="<[10.10.1.22:*:'REGEX((.*))']" }

The problem is now that I can not seem to put the value received (I0142318) into the String item above.
Am I doing something wrong here?

Thx!

6

If it is trying to stuff this message into your original Item, I guess the binding is treating it as a response to your command, I don’t know.
It looks like you just need to configure a < binding on your original Item to capture it, then play with the inbound transform to isolate the numeric