Keyboard input issues with bluetooth and multiple devices.

[theantichris]

I received my UHK80 about 2 weeks ago. I connected it via USB to my Linux (CachyOS/Arch) desktop then paired it over bluetooth, everything worked great.

Yesterday I wanted to connect it to my Pixel Fold 10 for use with the Android Linux Terminal. It took a long while for UHK 80 BLE to show up (UHK 80 Right NUS consistently shows up but doesn't accept pairing) but it eventually did and I paired it successfully. It worked, including the trackpad module. I saved the connection in Agent and setup the Fn2 shortcut.

I then used the existing shortcut to switch back over to the desktop BT connection. It connected but no keyboard input was registered. The trackpad module still worked, though. USB connection still works fine.

I figured I'd try to reconnect. I deleted the connection from Agent and unpaired the keyboard. UHK 80 BLE still hasn't shown up in a bluetooth scan after roughly a hour.

Switched the BT connection over to the Pixel 10 Fold and it is doing the same thing now. No keyboard input but trackpad works.

I have firmware 16.0.0 and Agent 9.0.0.

UPDATE

Now when I attempt to connect the UHK80 to any device via BT it connects and pairs but sends no input.

[mondalaci]

In Agent, please open the About page, click the Agent logo 7 times, then open the newly appearing advanced settings page in the side menu. From here, you can enable Zephyr logging for the right half and then copy and paste the log.

It can also be helpful to add log lines manually, like:

# I paired to my Android tablet here

[theantichris]

I deleted all connections and pairings yesterday. I enabled logging as instructed then paired my Linux desktop via Bluetooth. It pairs and switches to that connection but I am still getting no input from it. Agent didn't prompt me to add the connection but I can switch between USB and Bluetooth using the next/prev connection keys.

Here are the logs:

2026-01-02 10:52:49 | UHK 80 right    | Batteries: 100% 100% (4084 4161)
2026-01-02 10:53:33 | UHK 80 right    | Bt: Connected cb

Bt: connected n/a (New Bluetooth Device, 60:45:2e:9a:03:11), 23 3

Bt: Received passkey pairing inquiry.

Bt: Type `uhk passkey xxxxxx` to pair, or `uhk passkey -1` to reject
2026-01-02 10:53:40 | UHK 80 right    | Bt: Sending passkey to conn n/a (New Bluetooth Device, 60:45:2e:9a:03:11)
2026-01-02 10:53:43 | UHK 80 right    | Bt: Pairing completed: n/a (New Bluetooth Device, 60:45:2e:9a:03:11), bonded 1

--- Pairing ended, success = 1: Successfuly bonded! ---
Bt: btManager: BtManager_StartScanningAndAdvertisingAsync because StartScanningAndAdvertisingAsync in BtPair_EndPairing

Bt:      disconnecting unassigned connection n/a (New Bluetooth Device, 60:45:2e:9a:03:11)

Bt: btManager: BtManager_StartScanningAndAdvertisingAsync because StartScanningAndAdvertisingAsync in ReserveConnections

Conn state: Host22(New Bluetooth Device, Disconnected), Selected
Conn state: Host22(New Bluetooth Device, Connected), Peer host1, Selected
Bt: Established HID connection with host1 (New Bluetooth Device, 60:45:2e:9a:03:11)

Conn state: Host22(New Bluetooth Device, Ready), Peer host1, Selected
Conn state: Host22(New Bluetooth Device, Ready), Peer host1, Active
Bt: btManager: BtManager_StartScanningAndAdvertisingAsync because StartScanningAndAdvertisingAsync in connectHid

Bt: btManager: BtManager_StartScanningAndAdvertisingAsync because StartScanningAndAdvertisingAsync in pairing_complete

Bt: Refusing authenticated connenction 23 (this is not a selected connection)

Bt: Refusing connenction host1 (New Bluetooth Device, 60:45:2e:9a:03:11) (this is not a selected connection)

Bt:     Free peripheral slots: 2, Periphe
2026-01-02 10:53:44 | UHK 80 right    | ral conn count: 3, bt pari mode: 2
bt_conn: conn 0x2000fbf8: not connected
bt_conn: conn 0x2000fbf8: not connected
Bt: btManager: should scanAndAdvertise 0 1

Bt: Starting advertising, try 0!

Bt: start advertising
Bt: Adv: advertise nus, with allow list.

Bt: filling adv allow filter
Bt: Adv: NUS advertising successfully started

Bt: Bt disconnected from host1 (New Bluetooth Device, 60:45:2e:9a:03:11), reason 22

Conn state: Host22(New Bluetooth Device, Disconnected), Peer host1, Active
Conn state: Host0(tranchux, Ready), Active
Bt: btManager: BtManager_StartScanningAndAdvertisingAsync because StartScanningAndAdvertisingAsync in disconnected

Bt: btManager: should scanAndAdvertise 0 1

Bt: Starting advertising, try 0!

Bt: start advertising
Bt: Adv: advertise nus+hid.

Bt: Adv: HID "and NUS" advertising successfully started

Bt: Connected cb

Bt: connected n/a (New Bluetooth Device, 60:45:2e:9a:03:11), 23 3

Conn state: Host22(New Bluetooth Device, Connected), Peer host1
Bt: Established HID connection with host1 (New Bluetooth Device, 60:45:2e:9a:03:11)

Conn state: Host22(New Bluetooth Device, Ready), Peer host1
Conn state: Host22(New Bluetooth Device, Ready), Peer host1, Active
Bt: btManager: BtManager_StartScanningAndAdvertisingAsync because StartScanningAndAdvertisingA
2026-01-02 10:53:44 | UHK 80 right    | sync in connectHid

Bt: btManager: should scanAndAdvertise 0 1

Bt: Starting advertising, try 0!

Bt: start advertising
Bt: Adv: advertise nus, with allow list.

Bt: filling adv allow filter
Bt: Adv: NUS advertising successfully started
2026-01-02 10:53:49 | UHK 80 right    | hogp: starting HID app REPORT: 1
2026-01-02 10:53:50 | UHK 80 right    | Bt: host1 (New Bluetooth Device, 60:45:2e:9a:03:11) conn params: interval=7 ms, latency=0, timeout=1000 ms

hogp: get report failed
hogp: get report failed
bas: BAS Notifications enabled
2026-01-02 10:54:01 | UHK 80 right    | Conn state: Host0(tranchux, Ready), Active
Conn state: Host0(tranchux, Ready), Active

[mondalaci]

@kareltucek Please help with this issue. I think chances are there's already a related issue.