I’ve updated the HS-WD100+ Device Handler to add the option to specify a fade-up rate for the dimmer on for remote commands. It’s off by default, but can be set in preferences via the gear icon by selecting “Enable remote dim fade-up”. In preferences, You can also change the default values for the % size of each level (currently 5%) and the ms duration to spend at each level (currently 20ms).
In general, the dim level would ramp up more smoothly than I expected considering it’s being managed by the device handler and not on the switch where it belongs. Occasionally though, as expected with the cloud and mesh network, I could see some jitter and every so often an out of order level command. Let me know how it goes…