How to use 1W data?

[PaddyB]

OK, today I made some picture (a lot, really!) to the screen.
Name of the photo and description:
General view: The OpenCPN standard view (not hooker the AIS, the swill be the subject of another thread, when resolved this one);
OP I2C: this is the windows of I2C interface populated by the "Add" button. The real sensor is a BMP, not a BME as listed;
NMEA outside temp: a detail of the temperature line of the previous window;
OP 1W: this window was populated "by hand"; 
Edit Temp sensor: the sensor added manually;
(the following line refer to attachment I have to place in a subsequent post)
diagnostic Signal K: the output of diagnostic; observe that the three temperature sensors (one from I2C and two from 1W) works correctly. The problem is that I can't use those values, i.e. I can't place in dashboard (or at lest I don't know how do!);
NMEA 0183 generator: the window populated when empty pressing the "add" button, but the last line added manually;
NMEA inside temp: the $-MTW sentence added automatically. Why the Field name is "Water Temperature"?
NMEA engine room temp: ditto for the previous one, but added manually. It is not visible in the list available for the Dashboard;
add instrument from 1 to 8: the Add Instrument window in Dashboard showing that are listed only two temp. How cam custumozie this window? How other values, sensor, etc. can be made available to dashboard? and how can one change the title of a dashboard value? (i.e., from Water temperature to the temp really measured?)

OK, I inserted some question in detailing the content of the various pictures.
The problem is: I have some 1W temperature sensor I am able to insert. How can I customize or add a my Key to "Select Signal K key" window? (and why the description is not in sync and not editable? and what is the use of the last filed?)
And in the "NMEA 0183 generator" windows "add NMEA 0183 sentence".

Try to simplify: I wish have on Dashboard the values of various sensors in this case 1W temperature sensor. How must I proceed?

Thank you to all :-)

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Thank you to all :-)

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add instrument from 1 to 8:
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Thank you to all :-)

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Thank you to all :-)

in this post five more attachment, not all the seven more showing any line own the windows

The only nmea sentences recognized by the dashboard are in here, not many to choose from.

https://opencpn.org/wiki/dokuwiki/doku.p..._sentences

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