Howto get zwave devices connectivity status ?

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1

I would like to use zwave devices polling interval to check if I have some radio jamming.
I Actually use that piece of code (this is an example) :

[code]for i = 1, 20 do

local j = luup.variable_get(“urn:micasaverde-com:serviceId:ZWaveNetwork1”, “LastError”, 1)
if (j == “Poll failed”) then
luup.log(“Aie aie aie aie aie aie aie aie aie aie”)
luup.variable_set(“urn:micasaverde-com:serviceId:ZWaveNetwork1”, “LastError”, “”, 1)
end
luup.sleep(2000)
end[/code]

Is there a proper way to do that task (without using luup.wget) ?

Thanks.