When two or more Hubitat Elevation hubs run on the same local network, you can easily share and use devices in automations among multiple hubs with Hub Mesh. Using a simple "share and link" setup, all participating Hubitat Elevation hubs are able to effortlessly control and stay in sync with devices and (optionally) mode changes or hub variables from one hub on another hub. Events, commands, etc. are seamlessly shared among the hubs for selected devices.
NOTE: Hub Mesh is not available on hubs running a platform version prior to 2.2.4 (the platform version is listed in Settings > Hub Details and can be updated in Settings > Check for Update). It is recommended to keep all Hub Mesh hubs on the same platform version (e.g., as of this writing, version 184.108.40.206 is not compatible with earlier versions), though this is not always required
From the Hubitat Web Interface select Settings, then Hub Mesh.
To share a device from the current hub with other hub(s), select the Local Devices tab. Select the small "up" icon next to a device to share it with Hub Mesh.
Devices that have been shared will appear in the Shared devices list at the top of the Local Devices tab. Selecting any of the device names in the list will take you directly to the settings page of that device. Select the "stop" icon to the left of any device to stop sharing that device via Hub Mesh.
On another hub where you would like to link to devices shared in Hub Mesh, navigate to Settings > Hub Mesh and then select the Linked Devices tab. If your shared devices do not show up in the remote devices list, refresh your browser or use the "refresh" (arrows icon) towards the top of the Linked Devices page. Select the "+" icon next to a remote device (under Available On Hub Name) to add it to this hub, or select the trash icon next to a shared device that was added (under Linked devices on this hub) to remove it from this hub.
Links from shared Hub Mesh devices will be created in the devices list of the hub linking to them. Multiple hubs can link to devices shared through Hub Mesh.
NOTE: To actually add the shared device to other hubs, you will still need to use the Linked devices tab on the hub where you want the linked device to be added, as described above in Step 4.
NOTE: If you no longer want a Hub Mesh Linked Device in your device list, it must be manually removed.
Hub variables can be shared in a manner similar to devices. Use the Local hub variables tab to share variables from the current hub via Hub Mesh, and used the Linked hub variables tab to add devices to the current hub that have been shared from other hubs.
You can set Hub Mesh to follow Mode changes of other hubs by using the Modes tab.
IMPORTANT: If you have Mode Manager installed, you should uninstall it from hubs participating in Follow Modes. This prevents conflicts between the “follow modes” feature of Hub Mesh and Mode Manager on the current hub and prevents mis-matches of current modes among Hub Mesh hubs. (This applies to any app, including rules, that may also change modes on this hub.)
When Hub Login Security is enabled on the hub from where devices are shared, it is necessary to provide the linking hub with a security key. Failing to do this will result in linked devices that do not synchronize with the sharing hub.
With Hub Login Security enabled, a lock icon will appear next to the Active hubs list. This will show a warning with an exclamation mark icon when the security key from the sharing hub is not available to the linking hub.
Copy the security key from Hub Mesh settings on the sharing hub. If one has not been set or it needs to be updated, select Regenerate:
In the Active hubs list, select the exclamation mark warning icon next to the hub with login security enabled, and enter the key from the other hub from the previous step:
Once a valid key from the sharing hub has been entered, the warning icon will disappear and device synchronization will resume. If the warning icon does not disappear in the Active local hubs list, refresh your browser.
You can easily swap a Hub Mesh device on one hub with a different Hub Mesh device. To do this, navigate to the device detail page for the Hub Mesh device on the linked hub (the hub to which the device is shared). Then, scroll down to the Device Information section and locate the dropdown currently displaying Keep current device link. If other Hub Mesh devices are available to swap with, they can be selected from this list.
(Use caution if the Hub Mesh device is a parent device with child devices in use on this hub.)