Author Topic: Cannot detect devices  (Read 362 times)

Offline hwve

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Cannot detect devices
« on: July 13, 2017, 12:47:14 pm »
After a few years of using Vera Plus, I all of a sudden get the dreaded " Cann't detect device error". >:(

Why would I suddenly get this situation.  I get them on 14 devices (out of 50).
What do I need to do to reactivate them?  I really don't want to go thru an unpairing/pairing drill. :-[
I don't understand, my Vera Plus system had been running ever since the Plus came out.

Offline Nameless

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Re: Cannot detect devices
« Reply #1 on: July 13, 2017, 01:35:35 pm »
I had a similar situation that was caused by a low battery in a water sensor. Other devices lost Vera connection, not the sensor.

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Offline hwve

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Re: Cannot detect devices
« Reply #2 on: July 13, 2017, 01:45:15 pm »
Thanks for your reply. 
How did you find out which sensor it was if the devices cannot be detected?

Offline kartcon

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Re: Cannot detect devices
« Reply #3 on: July 13, 2017, 06:43:06 pm »
I too have seen this for the first time using my new Vera Secure (never before with the Vera 3), and see that sometimes you can clear the error by simply cycling the device - turn light on/off, lock/unlock door. All of my battery devices were at 100% when it occurred, so no real hint as to why. I also noted that one wall switch completely dropped off the system and had to be removed and re-paired. Since this happened about a week ago no further major issues but still an occasional 'Cant detect' error.

Offline Nameless

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Re: Cannot detect devices
« Reply #4 on: July 13, 2017, 11:44:17 pm »
Thanks for your reply. 
How did you find out which sensor it was if the devices cannot be detected?

What was weird for me was that the sensor with a low battery never lost connection. I banged my head against the wall for a solid month and then my sensor suddenly reported a low battery, down from 50+% the previous day. I replaced that battery, the device lost pairing for some reason, paired the sensor back into Vera and waited. It took another 2 days for the device dropouts to stop, but they improved. One more exclude / pair cycle of a separate wired device that was acting odd after the sensor battery replacement, but then it has been fine.

If it happens to me again, I'm heading straight to that sensor first.

Offline Jamr

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Re: Cannot detect devices
« Reply #5 on: July 14, 2017, 04:17:18 pm »
One thing to remember with wireless battery powered Z-Wave sensors is that they do not relay your Z-Wave signal to other Z-Wave devices. Z-Wave and Z-Wave + is only rated at 100' and the most with + is 150' and that is line of sight with no walls in between the controller and the sensor. Z-Wave works best when you have an expanded Z-Wave mesh network. This means you need hard wired Z-Wave products that will relay your signal to other devices.
If you have nothing but battery powered devices on your network, your range from the controller will be very short.

Another problem with wireless is other devices using the Z-Wave spectrum. Although I am no expert in this area, I have heard and experienced crowded freq's causing problems for Z-Wave devices. Especially at longer distances from the controller.

Offline hwve

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Re: Cannot detect devices
« Reply #6 on: July 14, 2017, 04:48:42 pm »
The baffling thing is that all these devices had been working for weeks and all of a sudden 7 of them quit responding.  Looks like I have a reach issue.  When I bring the units in the office they work, then outside the loose contact, but there are other units physically nearby that should complete the mesh.  I am at a loss.

Offline John M.

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Re: Cannot detect devices
« Reply #7 on: July 15, 2017, 10:23:11 am »
Hi there,


If somewhere in the unit's past you've migrated your setup from an older unit (Vera3/Lite) this might be the problem.


While migration might be a short term solution, in the long run it will have the mentioned issues, because of the different Z-wave platforms.


I'm afraid the solution would be only one, to reset your z-wave network and start clean, instead of migrating. See our disclaimer here: http://support.getvera.com/customer/en/portal/articles/2337105-to-veraplus-from-veralite-or-vera-3?b_id=712
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Offline hwve

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Re: Cannot detect devices
« Reply #8 on: July 15, 2017, 11:46:08 am »
I migrated to Vera Plus when that first came out. so that has been a while ago.  The system was running fine until a couple of days ago when 14 units quit responding.  This is very disconcerting to me aims I obviously depend on these things performing as they should.  Something is not right obviously.

Offline Don Phillips

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Re: Cannot detect devices
« Reply #9 on: July 15, 2017, 01:23:04 pm »
This past winter my old CT30 thermostat was knocking out my z-wave network.  Took me time to figure it out, but I only have 8 z-wave devices.  The new CT101 solved the problem.
Vera 3, UI7 1.7.947, CT101 t-stat, Everspring motion detector, GE/Jasco switch, Leviton outlet, AeonLabs door sensor, Insteon garage control, Blue Iris, Sricam SP011, iPhone locator, APCUPSD, VeraMate, VeraAlerts, PLEG, House Modes, Countdown Timer, DVR, Virtual & Multi Switch, Weather, Sys. Mon.