@Bethel.8009 Could the problem be that my dumb switch is a dimmer?

@Bethel.8009 Attached is the picture of the old switch before I removed the wires.you can see that the red and white wires were attached to the light gold screws and the black was attached were the...

@Bethel.8009 I emailed a picture from my phone, but I am now very sure that the black is the common and the white and red are the travellers. I labelled them that way before removing them from the...

@Bethel.8009 I replaced 1 dumb 3 way switch with the HS210, but on the app, it doesn't seem to know whether the light is on or off so I have to switch it twice for it to change the actual light being...