using executeCommandLine to send a curl command

[eric]

Hello,

I'm trying to use the OpenHAB interface to initiate a curl command.  OpenHAB is running on a Raspberry Pi.  I'm able to run this command from the Pi's terminal to dim lights.

curl "http://192.168.1.7/set_dev_value.php" -d "nodeId=a&attrId=aprontest -u -m2 -t2 -v 5;"

I'd like to run this command everytime DemoSwitch is pressed, for example.  Trying to use this rule, I don't see any results.

rule "dim it"

when

Item DemoSwitch received update

then

executeCommandLine("curl "http://192.168.1.7/set_dev_value.php" -d "nodeId=a&attrId=aprontest -u -m2 -t2 -v 5;"");

end

This gives me an error:

ERROR o.o.c.s.ScriptExecutionThread[:50] - Error during the execution of rule 'dim it': The name 'http' cannot be resolved to an item or type.

If I put the curl command in a script file and run the script file, that works.  However, eventually, I'd like to be able to pass the dim level directly from an OpenHAB dimmer widget to the curl command, so I thought it's pretty important to be able to run the curl command directly from OpenHAB.  Perhaps I'm wrong?  Can I run a script file and pass the script file a parameter ( the dim value)?

Thanks.

[druciak]

Escape double quotes inside your command:

  executeCommandLine("curl \"http://192.168.1.7/set_dev_value.php\" -d \"nodeId=a&attrId=aprontest -u -m2 -t2 -v 5;\"");

Krzysztof

[eric]

Ah, thanks.  If I want to replace the literal value "5" with the value of a item of type Number, is that possible?  After playing with it, I think scripting it makes sense, as long as I can pass a parameter to the script, like this:

Number My_Light_Level "Light Level [%.1f]"

executeCommandLine("/opt/dim1.sh My_Light_Level.state");

Except I want it to replace the parameter with the value of <My_Light_Level.state>.

Also, while the script is running, is OpenHAB blocked from doing other things until the script completes?

[druciak]

You can build your command line by concatenating string of using String::format().
Like this:

executeCommandLine("/opt/dim1.sh" + My_Light_Level.state)

or this in more complex cases:

var DecimalType level = My_Light_Level.state as DecimalType


executeCommandLine(String::format("/opt/dim1.sh %d", level.intValue))

Krzysztof