Welcome to the forum Azrael_84, and thanks for posting config files here with a return link to the original comment. Nice! 

What I noticed, when comparing the 2 files, is that the config file v1.4 uses a period as a decimal separator, where as v2.0 is using a komma.
In v2 you can set this in "Preferences" under "Config File Decimal Separator" to "Period".

That will most likely solve the issue. 

Dear Hans,
thank you for your reply, but the period and komma change couldn´t solve the problem. When i start up my libreelec computer there is written "no connection to boblight" when i use the config file created by your newest config maker program.

Configuration Screen Boblight configmaker vers.2
[url url= ][/url]

I'd also disable the comments as well. Set under "Preferences" the "Config File Comments" to "No Comments".
Just to make sure that does not interfere.

You could also try to copy and pasting the [global], [device] and [color] from v1 -> v2.

here are the logs of my libre system

... and a setting screen from configmaker v. 2
[url url= ][/url]

settings

I can't see much in the log files, except that the connection is refused ... 

Did you try copy/paste the [global], [device] and [color] sections from the v1.4 config, overwriting the v2.0 config sections?
The only real differences I see are "delayafteropen 100000" (in v2 this is set to 0) and "colorOrder RGB" (does not exist in v1.4).

Did you also try removing all comments?

copying the settings doesn´t work, all comments are removed.

That's weird ... the [global] and [device] sections determine communication - if wrong, this would cause the "could not connect" message.
Can you post the log and the config file after you made those changes?

sorry Hans for the delay. Here is my kodi log file and the modified configmaker file 1.4 and 2.0. When i use this modified  file, there is an error message: not connected to boblight. 

I was also trying to use hyperion but this is a great failure, till now i didn´t get my led´s shining. the only thing that is working is your arduino sketch with boblight configmaker file 1.4 nothing else worked. Only that the start point isn´t right and the colors seem to be a little intense.

I see in your modified config file that still komma's are being used, where as the working config file used a period.
Open the config file in a text editor and do a search and replace, replacing all komma's (,) with a period (.) and try again.

The connection settings are identical, and in the log I see the error messages concerning the komma:

(CConfig::CheckLightConfig)     ERROR: /storage/.kodi/userdata/addon_data/service.multimedia.boblightd/boblight.conf line 669 section [light]: wrong value 1,5 6,2 for key vscan

--> komma makes it fail 

Hi Hans i removed the comma and replaced them with points ., still no working ambilight, the error message not connected to boblight.

Ah crap, we're not very lucky in getting this to wrok, are we? But I'm not giving up just yet ... 

I removed all comments, see attached file, try that one ...

sorry Hans, it´s the same: failed to connect to boblightd. I am running out of ideas

Hi Azrael_84,

Well, that's a bummer.

So according to the log file; it cannot connect. This usually means that the [device] and [global] section are not set right (or: serial speed and prefix are not matching with the sketch values). Or ... you're connecting to the wrong USB port (or in other words: setting the value for "output" is wrong).

You said that the v1.4 config worked ... right?

For the last file I posted here and you working v1.4, the [device] and [config] are identical. So that should not be the issue.

The komma and period issue has been addressed my file as well, and all comments have been removed as well to make sure.

There must be something else going wrong.
You're using the exact same USB port for the working v1.4 and the one I editted, right?
Can you send me the log for when you're trying the working v1.4?
You're not changing anything on the Arduino right?