Exec binding for UDP commands

Add-ons Bindings
1

Since there is no TCP/UDP binding anymore in openHAB 3, I’m thinking about replacing it by the exec binding. I don’t use the openHAB config that much, so I’m a bit rusty right now.

I have 2 different cases I need to handle.

  • Simple ON/OFF command :
Switch	Light_GF_Corridor_Ceiling	"Gang beneden"	(gGF,LightSwitches) [ "Lighting" ]	{ ga="Light", udp=">[ON:10.10.1.30:1001:'MAP(my.corridor.map)'] >[OFF:10.10.1.30:1001:'MAP(my.corridor.map)']", autoupdate="false" }

This map file is quite simple, just contains the value I need to send for a ON and OFF (includes a specific ID for the light I’m trying to control)

  • Dimmer control with percentage :
Dimmer	Light_GF_Dinner_Ceiling	"Eetplaats"	<slider> (gGF,LightDimmer) [ "Lighting" ] { ga="Light", udp=">[*:10.10.1.44:1001:'JS(dinner.js)']", autoupdate="false" }

The javascript file is a to manipulate the actual value sent to the dimmer.

(function(i) {
	if(i==0)
		return "C3001000";
		
	if(i==100)
		i=99;
	
	if(i<10)
		i="0"+i;
    var result="S3"+i+"1000";
    return result;
})(input)

That’s basically what needs to be replaced. But I don’t know where to start. :slight_smile:
I’m still running OH2 at this moment. Will perform the upgrade to 3 when I’m ready with this change.
Can somebody give me a push in the right direction please?

2

Maybe try

Create Thing

Thing exec:command:udp_corridor [command="/etc/openhab/scripts/udp_corridor.bash %2$s",transform="MAP(my.corridor.map)", autorun=true]

Item

Switch	Light_GF_Corridor_Ceiling	"Gang beneden"	(gGF,LightSwitches) [ "Lighting" ]	{ ga="Light", channel="exec:command:dp_corridor:run" }

udp_corridor.bash script

#!/bin/bash
/usr/bin/echo $1 > /dev/udp/10.10.1.30/1001

all commands need to be whitelisted.

… The dimmer item can also have on off states

3

Thanks for the help! I’m currently getting the following error message when I try this (with a normal light).
An exception occurred while formatting the command line with the current time and input values : ‘Format specifier ‘%2$s’’

Indeed, with my current solution, the ON/OFF states don’t always work properly for my dimmers. So if I can fix that at the sime time, it would be nice.

4

See also

5

Does that one work in the same way as the “classic” tcp/udp binding? And is that an official supported binding?

6

Of course not, OH1 syntax not supported in OH3, so it will follow Things and channels model.

No, you would put your faith in @J-N-K

1 Like
7

:rofl: Nice. But there are other contributors to that repository. And it’s also available via the JSON 3rd Party Addon-Service introduced in openHAB 3.2.0, so no need to download files from Maven Central anymore.

2 Likes
8

Is there any place where I can find documentation? Or a GitHub page?

9
10

Thanks for the help. I did some digging into the system that I have at home. Turns out it has API functionality. So my best choice would be to move everything to the HTTP binding in OH3.
Now I just need to find the time :slight_smile: