Controlling a Tech Boiler controller with curl command

johnym30 · November 14, 2018, 1:29pm

Hi everyone,
i have a boiler controller from TECH (Polish company) which after some internet digging i found out that i can control it through network sending some curl commands.
So when i send from terminal the command :

curl "http://xxx.xxx.xxx.xxx/admin/cgi-bin/edition.cgi" -H "Authorization: Basic xxxxxxxxxxxxxxxxxxxxxxxxx" --data "st=654_48" -s

It sets my DHW temp (654_) to 48.
How i can intergarte this to openhab so i can set my DHW temps?
I already tried

executeCommandLine("curl@@http://xxx.xxx.xxx.xxx/admin/cgi-bin/edition.cgi@@-H@@Authorization:@@Basic@@xxxxxxxxxxxxxxxxxxxxxxxx"@@--data@@"st=654_48"@@-s)

in a rule but it doesnt seem to be working.
Thank you in advance.

dan12345 · November 14, 2018, 1:53pm

I think you’re missing some double quotes, and probably also need to escape the double quotes, e.g.

executeCommandLine("curl@@http://xxx.xxx.xxx.xxx/admin/cgi-bin/edition.cgi\"@@-H@@\"Authorization:@@Basic@@xxxxxxxxxxxxxxxxxxxxxxxx\"@@--data@@\"st=654_48\"@@-s")

But when I get lost in @@s I just create a simple bash script that can be reliably called by an executeCommandLine. So if the above doesn’t work you could try that.

vzorglub · November 14, 2018, 2:02pm

Use sible quote inside the double quotes. Linux is happy with that
No need for @@ instead of spaces. That’s in the binding only.
Add a timeout at the end.

executeCommandLine("curl 'http://xxx.xxx.xxx.xxx/admin/cgi-bin/edition.cgi' -H 'Authorization: Basic xxxxxxxxxxxxxxxxxxxxxxxxx' --data 'st=654_48' -s", 5000)

johnym30 · November 14, 2018, 2:25pm

Hi thanks for immidiate replys.
When i try to run the rule i get the error below in the console.

Execution failed (Exit value: -559038737. Caused by java.io.IOException: Cannot run program "curl 'http://xxx.xxx.xxx.xxx/admin/cgi-bin/edition.cgi' -H 'Authorization: Basic " (in directory "."): error=2, No such file or directory)

vzorglub · November 14, 2018, 2:46pm

Have you tried a direct curl in the command line with single quotes?
Does that work?

johnym30 · November 14, 2018, 2:55pm

Yes it is working with single quotes from cmd.
And from the logs i see

16:58:53.074 [INFO ] [clipse.smarthome.io.net.exec.ExecUtil] - executed commandLine 'curl 'http://xxx.xxx.xxx.xxx/admin/cgi-bin/edition.cgi' -H 'Authorization: Basic am9obnltMzA6cDQ1NXcwcmQ=
' --data 'st=654_54' -s'

when sending the command i realized that at my authorization code i miss some characters.
My auth code is am9obnltMzA6cDQ1NXcwcmQ=\r\n while in the logs it misses \r\n

vzorglub · November 14, 2018, 3:11pm

You need to escape the \r\n in the string

johnym30 · November 14, 2018, 3:45pm

ok one step further but the command doesnt seem to execute

17:44:31.449 [INFO ] [clipse.smarthome.io.net.exec.ExecUtil] - executed commandLine 'curl 'http://192.168.1.53/admin/cgi-bin/edition.cgi' -H 'Authorization: Basic am9obnltMzA6cDQ1NXcwcmQ=\r\n' --data 'st=654_50' -s'

Maybe something with the quotes??

vzorglub · November 14, 2018, 3:50pm

Try extending the time out
and do this:

val String response = executeCommandLine("curl 'http://192.168.1.53/admin/cgi-bin/edition.cgi' -H 'Authorization: Basic am9obnltMzA6cDQ1NXcwcmQ=\r\n' --data 'st=654_50' -s", 10000)
logInfo("TEST", response)

johnym30 · November 14, 2018, 9:26pm

i get this in the logs

23:25:27.920 [INFO ] [g.eclipse.smarthome.model.script.TEST] -

vzorglub · November 14, 2018, 10:49pm

What does the curl command normally returns?

johnym30 · November 15, 2018, 9:04am

I tried it with the read command that sends me data back

val String response = executeCommandLine("curl 'http://192.168.1.53/admin/cgi-bin/edition.cgi' -H 'Authorization: Basic am9obnltMzA6cDQ1NXcwcmQ=\r\n' --data 'gt=654' -s", 10000)
logInfo("TEST", response)

if i run this command i get in the terminal 654_40

from the karaf console running the rule i get

11:02:06.716 [INFO ] [g.eclipse.smarthome.model.script.TEST] -

vzorglub · November 15, 2018, 9:09am

I am running out of ideas…

Maybe?

val String response = executeCommandLine("curl 'http://192.168.1.53/admin/cgi-bin/edition.cgi' -H 'Authorization: Basic am9obnltMzA6cDQ1NXcwcmQ=\\r\\n' --data 'st=654_50' -s", 10000)
logInfo("TEST", response)

johnym30 · November 15, 2018, 10:31am

If i dont add a timout i get

12:30:08.455 [INFO ] [g.eclipse.smarthome.model.script.TEST] - null

johnym30 · November 15, 2018, 11:42am

Is there any way i could do that with a script? for i have some scripts that are working flawlessly with executecommandline.

vzorglub · November 15, 2018, 11:44am

Possibly, put the curl command in a script and call the script

johnym30 · November 15, 2018, 11:50am

Ok although i dont have programming skills that would be the easy part, but how i can pass a command to the script.
Right now you can see what i was trying to accomplish with the rules below.


 //Set DHW Temp
rule "Set DHW Temp to Boiler"
when
    Item SetDHWTemp received command
then
	executeCommandLine(" curl 'http://192.168.1.53/admin/cgi-bin/edition.cgi' -H 'Authorization: Basic am9obnltMzA6cDQ1NXcwcmQ=\\r\\n' --data 'st=654_" + receivedCommand + "' -s" , 10000)
	end

If there is another way to do it, i would be more than happy to hear it!!!

johnym30 · November 15, 2018, 1:13pm

ok i made a simple script

#!/bin/bash                                                                                                                                                                                     
DHWTemp=`curl "http://192.168.1.53/user/cgi-bin/edition.cgi" -H "Authorization: Basic am9obnltMzA6cDQ1NXcwcmQ=\r\n" --data "st=654_45" -s`
#

and with the rule

rule "Send DHW Temp to Boiler"
when
    Item DHWSet received command
then
	executeCommandLine(" /etc/openhab2/scripts/setdhwtemp" )
end

My temp changes to the value i set to the script (st=654_45)
if i change 45 to 50 it will change my temp to 50.
How can i work this out now, everytime the item DHWSet receives a command (a number i suppose in my example) to be inserted in the script?