Hey All,

I installed an HS210 single that is supposed to work as a single switch without a second smart switch.

The common is two black wires,  the neutral is a bundle of white, the travellers are red and black, plus one copper ground.  There are only two switches.

The switch will work as long as the dumb switch is in one position. If its flipped, the smart switch stays on, and you can hear it tick the connection back and forth, but does not change the light.

Is there something I should change? Am I doing it wrong? Do the travellers matter polarity?