There is an issue with the monoprice binding in OH4.0 . There is an updated jar available that you can manually apply to fix the issue. More details here: Monoprice Whole Home with Ser2Net not working - #9 by mlobstein
There is an issue with the monoprice binding in OH4.0 . There is an updated jar available that you can manually apply to fix the issue. More details here: Monoprice Whole Home with Ser2Net not working - #9 by mlobstein