Keyboard

Main menu key: k

Use Cardputer as a USB or BLE HID keyboard to send keys to the host. This App cannot return to the menu with ESC — use BtnGO.

Screenshots

USB / BLE

Hosts list

Help

Shortcuts

Mode and exit

Key	Action
Fn + u	USB HID
Fn + b	BLE HID
Fn + p	BLE host list (switch / pair)
BtnGO	Exit to main menu (and disconnect BLE)
h	Help

BLE host list (Fn+p)

Stores up to 5 paired hosts; only one connected at a time.

Key	Action
1–5 / ; , . /	Select slot
Enter / Space	Switch to that host (disconnect current; on the target, tap Cardputer KB in Bluetooth)
n	New pairing (needs free slot; rejects reconnect from old hosts)
r	Rename current slot alias (Enter saves; empty name shows MAC again; ` cancels)
d	Delete current slot pairing
p / h	Close list

Fn layer (Help page 2)

Key	Action
Fn + `	Esc
Fn + Backspace	Delete
Fn + ; , . /	Arrow keys
Fn + 1–0	F1–F10
Fn + - =	F11 / F12
Fn + A/a	CapsLock
Fn + modifiers	Right-side modifier mapping (see Help)

Usage

1. Use a cable for USB, or Fn+b for BLE keyboard then pair on the host (Fn+p → n).
2. Multiple hosts: Fn+p opens the list, select a slot, Enter to switch. reconnecting #N means waiting for the target PC to auto-reconnect (usually within a few seconds; otherwise tap Cardputer KB in Bluetooth again).
3. New pairing with n: rejects old hosts grabbing the link, then search/pair on the new PC.
4. Type normal characters directly; function keys use the Fn layer.
5. Always exit with BtnGO (disconnects BLE); avoid confusing it with Esc sent to the host.