# Z-Wave Device Cannot be added or removed
**URL:** https://community.homey.app/t/z-wave-device-cannot-be-added-or-removed/150803
**Category:** Questions & Help
**Created:** [February 8, 2026, 7:15pm UTC](https://community.homey.app/t/z-wave-device-cannot-be-added-or-removed/150803 "2026-02-08T19:15:19Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Umit\_Ercan](https://community.homey.app/u/Umit_Ercan)
#### Post date: [February 8, 2026, 7:15pm UTC](https://community.homey.app/t/z-wave-device-cannot-be-added-or-removed/150803/1 "2026-02-08T19:15:19Z")
Hi , I am using Homey Bridge , I’m experiencing problems after a few days of use. Even though the Shelly Z-Wave Plug is installed, it keeps disconnecting from the system. I’m getting a “Coprecessor not connected” error. I’ve tried turning Homey off and on a few times, but the problem persists. In this situation, I cannot add a Z-Wave device to the system..What could be the issue?
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### Author:  [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)
#### Post date: [February 8, 2026, 7:37pm UTC](https://community.homey.app/t/z-wave-device-cannot-be-added-or-removed/150803/2 "2026-02-08T19:37:51Z")
If you use Homey Bridge as extension to a Homey Cloud instance, the error “Coprecessor not connected" means the bridge is not connected to Homey Cloud anymore
(It’s called “Coprocessor” internally).
This means it’s not z-wave related at all.
This error can be caused by 2 things
1. You’ll have to change your wifi, to match the bridge’s “preferences”:
- a separate 2.4GHz channel
- when you have Access Points installed, make sure to force the bridge to use one AP (It should not hop between AP’s)
- reserve the IP address for the bridge om your dhcp server (usually part of your modem/router)
1. When settings of point 1 don’t seem to have any effect, there’s most probably something wrong with the hardware device Homey Bridge
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### Author:  [@Umit\_Ercan](https://community.homey.app/u/Umit_Ercan)
#### Post date: [February 15, 2026, 7:36pm UTC](https://community.homey.app/t/z-wave-device-cannot-be-added-or-removed/150803/3 "2026-02-15T19:36:56Z")
When this happens, I can access Homey via the application. The device is directly connected to the modem’s Wi-Fi network. I’m sure Homey is connected to the internet because I use the presence feature, and when I arrive home, the scenarios I’ve set are activated, and I receive a notification message. It’s just that all the Z-Wave products are disconnected. Turning the device off and on again fixes the problem.