04-09-2019 06:08 PM
I added a third Wemo dimmer switch today, and have had nothing but grief since. Most of the time, attempting to connect with HomeKit results in an “Accessory Not Found” error. If I do get one connected, one of the others stops responding within minutes. I’ve tried a factory reset, circuit breaker power cycle, and re-setup on all three, at which point they worked for about fifteen minutes and then one of them dropped out.
Before adding the third, the first two had been working without fuss for a couple of weeks.
A Netgear Nighthawk router (latest firmware).
iPhone Xs (12.2).
Three Wemo dimmers (all with 188.8.131.5215).
wemo app 1.22.1
Home app (latest).
All three dimmers work just fine with the Wemo app, so they’re talking to the router OK. I have no better luck adding the dimmers to HomeKit using the connect feature in the Wemo app, or by manually entering the HomeKit ID number.
04-09-2019 07:56 PM
Oh, another oddity: I wanted to try removing them from HomeKit and re-adding them. As per the instructions, I went into the Home app and selected Remove Accessory for each of them. The dimmers disappeared from the Home app, as expected...but the Wemo app indicated that they were still connected to HomeKit, making it impossible to re-add them without first performing a factory reset.
04-09-2019 09:48 PM
Have you also tried observing this on a different compatible phone if the same "Accessory Not Found" still appears? Try to uninstall/re-install the HomeKit App for isolation. If this does not change anything, please send us an email at WemoCares@belkin.com along with the following details so we can have our 2nd Level Support Team assist you further:
-Mac Address of one (1) WEMO Dimmer
-Link to this post for reference
04-09-2019 10:04 PM
I have tried it on an iPad (running the same version of both apps).
I have tried uninstalling both apps, both with and without deleting my home data and starting from scratch.
I sent an email a few hours ago with all the information except the MAC address. I’ll follow up with that information.
04-09-2019 10:33 PM
Thanks for the update. Do include the link to this post so the Team can associate this post from the contact you sent via email.
04-12-2019 12:20 PM
OK, after scouring r/HomeKit and a ton of mucking about, I have all three dimmers connected to HomeKit and, for now, responding. The process that eventually worked was, frankly, ridiculous. I factory reset all three switches, deleted the Wemo app, turned off cellular data, told my iPhone to forget the 5GHz network, and then for each switch I followed the following procedure:
CONCLUSION: The app’s got issues. If the dimmers weren’t so pretty and $30 less than my second choice, I’d have replaced them by now.
It remains to be seen whether the dimmers will keep functioning or drop back into “Not responding” mode. I’ll update with the result.
04-13-2019 07:47 AM
If it helps, my aftermarket app AutomationManager lets you setup a server on android that eliminates the connection problems. There's an add-on HomeBridge for AM that let's you get to your devices from HomeKit and doesn't have these issues, and gives you a lot more options for automation.
04-14-2019 02:24 AM
04-15-2019 09:23 AM
Friday night, they all started responding in HomeKit, and have been working ever since. I had made no changes since my previous post. So I really have no idea what’s going on.
As it happens, Friday morning I ordered another brand to compare and see if I had better luck with it. It arrived yesterday, so I removed the Wemo from the family room and installed the new dimmer. Lo and behold, setup was quick and flawless, and as a bonus, my LEDs stopped buzzing. I’m now tempted to switch brands (I still have time to return the Wemos to Amazon), because having no idea why they started working, I have no great certainty that they will continue to work, and having buzz-free lighting is really quite nice. The only thing holding me back is that I really do prefer the aesthetic of the Wemo, and it’s significantly cheaper (but that may have something to do with the buzzing!)
I’ve got until Thursday to make a decision.