@Riley_S thanks for your reply.  I had looked at the switches as well as the packaging to know the hardware version and cannot seem to find that noted anywhere.

That said, I do already have the traveler wires connected to the same positions on both the main and satellite switches - black on top, red on the bottom.

  @Riley_S regarding the wifi setup, I get to the step where the app asks if the wifi indicator is lit - to which I answer no.  It then asks if the LED indicator is flashing orange and green - to which I answer yes.  Then it goes to the page that says it is connecting to the smart dimmer but pretty quickly that effort ends with a page that says "unable to connect to your smart dimmer wifi" along with a few troubleshooting suggestions - none of which work.

I have tried both the Reset and Restart buttons but neither has seemed to effect any changes. :(

  @Riley_S  several issues...  pressing and holding Reset seems to do nothing.  The status light continues to flash orange/green before, during and after doing so.  However, pressing Restart briefly stops the status light flashing but once Reset is released, the same orange/green status resumes.  At that time, the tp-link device did appear in my list of available wifi networks but when I tried to select it, a message of "authentication error occurred" briefly displayed and then the device disappeared from the list of available networks.  And now, I cannot seem to get that network device (TP-LINK_Smart Dimmer_F9F5) to repopulate in my list of available networks.

How should the status lights change during the Reset?  Does the fact that at present they do not change at all offer some clue as to what may be the issue?

  @Riley_S  oops.  Correction/typo.  In my previous response I mistakenly typed "...pressing Restart briefly stops the status light flashing but Reset is released..." when I meant to say "...pressing Restart briefly stops the status light flashing but when Restart is released..."

Sorry for that!

  @Riley_S despite waiting through several "cool down" periods, I cannot get my phone to ever see the wifi network for this switch.  Therefore, connecting the switch to the app remains a problem I cannot resolve.  I am throwing in the towel and will return this item.

Thanks for your help in trying to solve my issues.