===== Reserved System Chords =====
There are a few reserved chords in the Twiddler.  They are used to perform some system level functions in the Twiddler.

====== Firmware 2.12 and Later ======

==== Thumb only chords ====
^Thumb^0^1^2^3^4^
|Sleep (T023)|X| |X|X| |
|Wake in Bootloader Mode (Hold T14 then press T0)|X|X| | |X|

==== Thumb 0 (T0) and Finger (Fx) chords ====
^Finger^L^M^R^
|0| | | |
|1| Display KB LEDs (T0F1L)  | Battery Level (T0F1M) | [[t4_printstatus|Print Status (T0F1R)]] |
|2| | | |
|3| | | |
|4|Cycle Nav Mode (T0F4L)\\ 1st Yellow LED for Mouse Mode \\ 2nd YellowLED for Scroll Wheel Mode |Cycle Config (T0F4M) \\ 1st Green LED on for 1.cfg \\ 2nd Green LED on for 2.cfg \\ 3rd LED on for 3.cfg \\ All on for Default Config |Cycle Bluetooth Pairs (T0F4R) \\ Erase Bluetooth Pairs (T14F4R) |



====== Firmware 2.10 and earlier [Deprecated] ======

^ Chord ^ Action ^ LED ^
| Touchpad Click (T0) | Wakeup| Solid Red, Green, Blue for 1/2 second |
| T014 | Enter Bootloader Mode \\ //**Must be in sleep mode first**// | Blink Green|
| T0F0L | Cycle Mouse Mode | Solid Yellow: Position 1-Mouse, 2-Scroll Wheel|
| T0F0M | Cycle active Twiddler.cfg file| Solid Green for cfg 1-3, all on for Default Config|
| T0F0R | Cycle between wireless Bluetooth  hosts| Solid Blue for hosts 1 to 3, all LEDs on indicates empty slot|
| T14F0R | Erase all Bluetooth Pairs| Blue LED, Scanning animation |
| T0F1L | Display Keyboard Lock Status| Solid White: Position 1-Num, 2-Caps, 3-Scroll|
| T0F1M | Display Battery Status|Solid Red, 1 Low, 2 Med, 3 Full|
| T0F1R | Print Firmware Version and Battery Status in Millivolts| No blink. Data is sent to host as HID (use notepad) |
| T0F4M | Sleep Mode| Solid White|

Represented on the Twiddler Key Matrix

^Finger^L^M^R^
|0| Cycle Nav Mode (T0F0L) | Cycle Config (T0F0M) | Cycle Bluetooth Pairs (T0F0R) \\ Erase Bluetooth Pairs (T14F0R) |
|1| Print KB Status (T0F1L) | Display KB LEDs (T0F1M) | Battery Level (T0F1R) |
|2| | | |
|3| | | |
|4| | Sleep (T0F4M)| |