CHAPTER 3 TERMINAL OPERATING

3.I Connecting to the host

3.I.1 Main Menu

At the top of the screen, the terminal ip address and the WTNCE version are shown.

Click on the session you want to connect and then click the Connect button.

3.I.2 Connecting

While connecting to the host, wait a few seconds.

3.I.3 Connected - AutoLogin

The keyboard is locked while "Auto-Log" feature is running. Waits for the Log prompt, and the password prompt (and optionally for user and code). After successful "sign on" or failure, the keyboard unlocks.
You will manually unlock the keyboard by the unlock sequence.

The current terminal type (TERMINAL ) appears in the command bar. See selected by host.

3.I.4 Can't Connect

If the connection is not possible, the following screen appears:

3.II Ending session

While connected in a telnet session, the session will be closed by the host, or by the user. To close the Telnet connection, key the end sequence. (Normally Ctrl-X), and the terminal returns to the Main menu. Or click on Disconnect option in the menu if the command bar is visible (see CHAPTER 6 CommandBar).

3.III Configuration

From the Main Menu, click the Configure button to see the configuration. See Chapter 4 for further information.

3.IV Printing

A printer may be attached to the serial port of the PDA. Special DEC-VTXXX sequences allow to redirect data flow to the printer. Printer driver in WTnVt is designed for "label" printers instead "line" printers, and data is stored in terminal to allow reprint operations.

If printer is not responding, the terminal displays a Pop Up :

****** ERROR ******
PRINTER
NOT CONNECTED

[ENTER] To Retry
[CLEAR] To Abort

[ENTER] Retries the whole connecting and printing operation.
[CLEAR] Aborts operation and suppress printing data.

Printer state may be checked by host using escape sequences.

3.V Scanning

The scanner activation is done by the trigger keys, depending on the terminal model. The scanner is activated and configured by the [SCANNER] section in the configuration file. Each barcode symbology has a specific section in the same file.
Scanner state may be set on or off by host escape sequences (ROI or Telxon).

3.VI Keyboard Operation

PDA Keyboard is "one finger" operating. When a keystroke needs a combination of several keys, those keys should be keyed sequentially (not at same time like PC's Keyboard).

To make a "Function + Control + Up-Arrow" function (e.g. to do a logical scroll up), do the following sequence :

Hit the [FUNC] key, then
Hit the [CTRL] key, then
Hit the Key.

The displayed blinking cursor reflects the keyboard state.

PDA Keyboard changes following the terminal. The same terminal may be shipped with different keyboards. The PDA keyboard has the following states :

Keyboard state	Key Sequence
Normal state locked, (toggle with Alpha key).	[ALPHA] key
Alpha state (in 35 keys terminals) locked, (toggle with Alpha key).	[ALPHA] key
Shift state, single.	[SHIFT] key
Control state, single.	[CTRL] key
Function state, single.	[FUNC] key)
Shift-Function state, single.	[SHIFT]+[FUNC] keys

Locked, means that the state remains locked, and changes at each time the [ALPHA] key is pressed ("toggle" system).

Single, means that the state applies only for the next keystroke, and then returns to the normal previous state.

WTnVt has predefined function keys that generates escape sequences following the current terminal type. These sequences are configured into the configuration file (Chapter 5) and may be changed. The defined function keys are :

[FUNC]+[1] to [FUNC]+[0] (see [VT_FNKEYS_XXXX] section)
[SHIFT]+[FUNC]+[1] to [SHIFT]+[FUNC]+[0] (see [VT_SFNKEYS_XXXX] section).
"Arrow" cursor keys (, , etc) generates escape sequences too (see [VT_CURKEYS_XXX] section).
Other keys may be "user configured" to send an escape sequence, (see Appendix A) and [VT_SCANCODES] section).

Some function keys, are trapped by the PDA operating system and perform some specific functions like "Lamp" (Backlight), "Dark" (dark LCD display), "Light" (dim LCD display), and may not be used for other functions.

See also Appendix E "Keyboard Reference".
See also Appendix A "Terminal Functions".

3.VII Screen and display

The emulated terminal normally has a 24 lines and 80 rows screen. WTNVT allows to configure non-standard display sizes emulation, up to 80 rows and 25 lines (See [VT_EMULATION] section).

For easy-to-use applications it is recommended to write or adapt them to the physical display size of the hand held terminal.

WTNVT has a "Logical Scroll" mechanism to allow large screen sizes to be mapped into the smaller PDA display (see [SCROLL] section). The map may be fixed or moving controlled by the FixedMode= option.

It is not recommended to use the moving option in an application, because users need to learn functions keys to scroll, and understand the "Logical Scroll" system.

The "Logical Scroll" system, automatically moves the PDA display into the screen area, following "edges", to show a display area around the cursor position.

User may also move the display area into the screen by using :

"Logical Scroll Keys".
Scroll bars by touch screen (if enabled in configuration file, [TERMINAL] section).
"Drag and drop" of display by touch screen (if enabled in configuration file, [VT_EMULATION] Section, DragDisplay).

In the fixed mode, the position of the display in the emulated screen is fixed, even if the cursor goes out of the display area.

3.VIII Troubleshoot

The RF transmission is a complex program with many protocol layers (RF, Ethernet, IP, TCP) in the operating system and an user application (client). This protocol stack in hand held terminals is subject to unexpected power off conditions (batteries removed, shocks, etc) that may prevent the terminal software to manage correctly some protocol sequences and may "hang" the terminal.

To restart the terminal in proper conditions, it will be necessary to reboot by a warm boot. See Appendix E - Resetting the device.

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