Log-watcher update?

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Good evening all. I have made the topic Daikin wifi controller options. I came a long way with @mwittig . Thanks for the great support. But in the end i can’t seem to find the solution for the log watcher who doesnt update info on pimatic.

I try to explain it as plain as possible and every step i make. Hope my explanation and my crappy english is ok

I log in with putty. The go to /home/pi
There i sudo nano test.log
In this logfile i add 1 line: temp=24
Then i cntrl X the file and save it.
Now i have the logfile.
Then i make a log-watcher device. This is the device:

Then i add it to my home page and 24 appears in the pimatic frontend.
Then i sudo nano the test.log again and change the line to:
temp=26
Then save with cntrl X and then go back to pimatic frontend.

The number isnt getting updated only when i go to the device. then click save and voilá, its updated.

Anyone have an idea?

@countjuh said in Log-watcher update?:

The number isnt getting updated only when i go to the device. then click save and voilá, its updated.
Anyone have an idea?

Sure. This does not work as a new file will be created each time you save the file in the editor. As the log watcher opens file for the read when initialized the file pointer becomes stale when you save the file in the editor (which is like deleting the file and creating a new one - most editor do it this way). The trick is to only append to the file and to use truncate to empty the file in place (see my earlier posts on the matter).

The following example works:

cd /home/pi
truncate -s0 test.log && echo temp=27 >> test.log
truncate -s0 test.log && echo temp=28 >> test.log
truncate -s0 test.log && echo temp=29 >> test.log

@mwittig said in Log-watcher update?:

truncate -s0 test.log && echo temp=27 >> test.log

pi@raspberrypi:~ $ truncate -s0 test.log && echo temp=27 >> test.log
truncate: cannot open ‘test.log’ for writing: Permission denied

chmod the log to 666. And then it works. But for the daikin log ( who is getting updated good ) it still doesnt work.

When i remove -s from curl i get this:
error [pimatic-shell-execute]: [ShellSensor#acouders] Error: Error getting attribute value for acouders: % Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed

0 0 0 0 0 0 0 0 --:–:-- --:–:-- --:–:-- 0
100 334 100 334 0 0 31212 0 --:–:-- --:–:-- --:–:-- 33400
If i do a manual line in putty with truncate etc and just one line:

 truncate --size 0 /home/pi/statusouders.log && echo ,mode=3 >> /home/pi/statusouders.log

then logwatcher refreshes himself.
I personally gonna think that the curl command has to do something with it? Strange thing is that the info from the curl command is written correctly in de logfiles. and also updates correct.

Hi all. Still no good result. Ive tried so much. Maybe i need to give up for a while.
Or maybe someone has an idea? Would be appriciated

I have been thinking. Maybe this is possible:
Maybe someone has an idea a plugin or script ( dunno, maybe this isnt possible ).
that recreates the device within a period ( lets say 10 secs ). If this is possible my control works. Just a brainfart guys, just i dont like the idea in giving up.

@countjuh said in Log-watcher update?:

Or maybe someone has an idea? Would be appriciated

Sorry, I have not been able to look into this again any earlier.

I think the problem is that the output from curl does not contain a trailing newline, which is required, however, as pimatic-log-reader reads line-by-line. You can add the newline by using the option -w "\n" with the curl command. The following test case worked for fine me. My test case uses a pimatic variable test which is read and appended to the log file by ShellSensor using curl and the pimatic REST API. When I change the value of the variable the ShellSensor will write the JSON result with the new value to file at the next interval. The LogWatcher now detects the new line as the log content has a trailing newline.

Global Variable test

...
    {
      "name": "test",
      "value": 1
    }
...

ShellSensor with curl command

...
   {
      "attributeName": "output",
      "attributeType": "string",
      "command": "truncate -s 0 /home/pi/test.log &&  curl -s -X GET --user \"USERNAME:PASSWORD\" http://localhost/api/variables/test -w \"\\n\" >> /home/pi/test.log",
      "interval": 5000,
      "id": "shell-1",
      "name": "shell-1",
      "class": "ShellSensor"
    }
...

Logwatcher

...
    {
      "file": "/home/pi/test.log",
      "attributes": [
        {
          "name": "temperatur",
          "type": "number"
        }
      ],
      "lines": [
        {
          "match": ".*\\\"value\\\":([\\d\\.]+).*",
          "temperatur": "$1"
        }
      ],
      "xAttributeOptions": [],
      "id": "log-1",
      "name": "log-1",
      "class": "LogWatcher"
    }
....

@mwittig

Thanks!!! IT WORKSSSS!! Finally the problem is solved.

i have made this line:

truncate -s 0 /home/status.log & curl -s http://192.168.2.9/aircon/get_control_info -w "\n" >> /home/status.log

Works like a charm!

Thankss very much!!!