Simple question, yet not found solution :)

[jadijkstra2000]

Hi all,

I have a little question... the only thing I want to do is to read the state of a switch in Bash...
how can I do that? I can use json but, not found how to call a specific value (Data or Status) of a switch..

I have a script (doorbell) which needs to check if gong is turned on yes or no, based on that the gong works or not...

Anyone?

[waaren]

I have a script (doorbell) which needs to check if gong is turned on yes or no, based on that the gong works or not...

Could be something like

Code: Select all

domoticzIP=127.0.0.1
domoticzPort=8084
gongIDX=382

devicestatus=$(curl -s "$domoticzIP:$domoticzPort/json.htm?type=devices&rid=$gongIDX" | grep '"'Status'"' )

if [[ $devicestatus == *"On"* ]]; then  
    echo Gong is On
else 
    echo Gong is Off
fi

[heggink]

probably better to not grep for Status (which returns the entire Status = "result" line), pipe the result into the command line json processor jq:

Code: Select all

devicestatus=$(curl -s "http://domoticz:8080/json.htm?type=devices&rid=1670" | jq .result[0].Status )

[waaren]

probably better to not grep for Status (which returns the entire Status = "result" line)

Please help me understand why you think using jq is better. My example does grep for "Status" so including the quotes.

I timed both methods bout could not see any difference in result nor in real, -user and sys times

[jadijkstra2000]

Awesome, this is exactly what I am searching for

[heggink]

probably better to not grep for Status (which returns the entire Status = "result" line)

Please help me understand why you think using jq is better. My example does grep for "Status" so including the quotes.

I timed both methods bout could not see any difference in result nor in real, -user and sys times

As I said, grep returns the entire line "Status" : "Off" and puts that into variable devicestatus. Either you check against that (instead of just "On" or "Off") or you use jq to only return the "Status" variable's value or just put the 3rd argument into devicestatus (there's lot's of ways). Since the output is json, a json processor might be easier to also test other fields and their values. Just a thought.

[jadijkstra2000]

It's working like a charm

Thanks guys!!!