No valid data from Garmin HRM-Dual
The heart rate monitor I use (Garmin HRM-Dual) works just fine with my Garmin watch and also with my mobile phone if I test it with some random heart rate app.
But if I connect it to Locus Maps 4.0.0 or 3.51.2, I'm not getting any valid data.
The app says "connected successfully" (.. in other words though..), but it still says "no valid data".
This does not seem to me like some kind of energy saving "feature" or configuration issue from my side.