Heel shows in inspector but not in opencpn?

[SkipperEarly]

@PuddyB : quote .... I think you can make your own nmea 0183 sentence to check.
can you please guide on this to enable below:

in ocpn for air pressure the $xxMDA is used:
Code:
****MDA,x.x,I,x.x,B,x.x,C,x.x,C,x.x,x.x,x.x,C,x.x,T,x.x,M,x.x,N,x.x,M*hh<CR><LF>
** | | | | Dew point, degrees C
** | | | | Absolute humidity, percent
** | | | | Relative humidity, percent
** | | | | Water temperature, degrees C
** | | | | Air temperature, degrees C
** | | |----Barometric pressure, bars
** |----- Barometric pressure, inches of mercur

have found the NMEA generator in the menu but am stuck thereafter.

All I want is show the BMP180 value which is now submitted as XDR sentence, unfortunately ocpn does not recognize this but expects above.