@AllyB 

For any Tapo support people on here, please can you offer advice, noting the following;

today, I set up a new rule set to try and achieve the same thing. This time I used a condition of a single tap on one switch toggling the opposite switch off / on. I find that again, the no 2 switch works fine both for 'off' and 'on'. However the number one switch won't turn on the opposite switch. 
 

I have these two switches bought to replace a broken one at home but until I get this sorted out, I can't use them. Please can I have some advice. 
 

Ally

  @AllyB 

Hi there,

I am able to tell the switch status a couple of ways. One is in the app as it indicates if switches are on / off graphically. Also, I have found that I can make the problem switch work correctly if i ask it to carry out two functions (turn on / off the other smart switch, and at the same time, turn off / on a smart plug which turns off / on my desk lamp). If I remove the second function of the light, it seems to stop working.

In terms of rule set conflict, these are two identical switches being asked to do the same thing via the same rule. If one goes on, toggle it's corresponding neighbour to make it mimic the status. If one goes off, toggle off. It works if switch 2 controls 1, but not if one controls 2 (unless I include the lamp). In terms of logic and conflict, the same S220 and same rule set should work both ways. 

The switches are not currently connected to anything. They are sat on the desk until I can be sure they will work properly and not prevent the house lights working as required.

Cheers

Ally