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CHAPTER 3 TERMINAL OPERATING

3.I Connecting to the host

3.I.1 Main Menu

The IP address shown at the top of display is the terminal IP address.

Key [FUNC] [1] to access to connect screens.

3.I.2 Connecting

• Hit [ENTER] to connect to the present session.
• Hit [CLR] to go back to the main menu.
• Hit any key to go to the next session (if any) (see [SESSIONS] in Chapter 5).

While connecting to the host. Wait few seconds. If it is not the correct IP address or Port, from main menu do [F2] to change configuration. The default address and port comes from configuration file.

3.I.3 Connected, Manual

After Telnet connection, (manual log)

If the terminal is selected by host, the current terminal type (TERMINAL) appears.
Following the application, key the log name and password.

3.I.4 Connected, Auto Log

After Telnet connection, (Auto log)

If the terminal is selected by host, the current terminal type (TERMINAL) appears.
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.

3.I.5 Out Of range

If the terminal is out of S24 radio network range, the terminal holds the connection and asks for retry or abort the session. The following screen appears :

If the session is aborted, the Telnet connection may remain opened in the host side and you should manually shutdown the session in the host.

On retry, the terminal try to send the current transaction. Move to a radio covered area to retrieve the host session.

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.

To swap to the next session hit the KeyNext key (see [SESSIONS] in Chapter 5).
To swap to the previous session hit the KeyPrev key (see [SESSIONS] in Chapter 5).

3.III Changing Host IP Address

From the Main Menu, key [FUNC] [2] to access to the configuration. Password protected. This is the active address, until a Bios Boot.

3.IV Printing

A printer may be attached to the serial port of the PDT. 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.

While storing printer data, the terminal displays :

Before print, the terminal connects to the printer and displays :

If printer is not responding, the terminal displays :

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

After a print operation, the following screen appears :

• [ENTER] restores the display and continue with terminal operations.
• [F1] Redo the last print operation.

Printer state may be checked by host using escape sequences.

"Pseudo printing" commands may be used to download configuration files to the PDT.

3.V Scanning

The scanner activation is done by the trigger keys, depending on the terminal model. The scanner is activated and configured by SCANNER section in 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

PDT 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.

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

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 [FNKEYS_XXXX] section)
•   [SHIFT]+[FUNC]+[1] to [SHIFT]+[FUNC]+[0] (see [SFNKEYS_XXXX] section).
• "Arrow" cursor keys (, , etc) generates escape sequences too (see [CURKEYS_XXX] section).
• Other keys may be "user configured" to send an escape sequence, (see APPENDIX A) and [SCANCODES] section).

Some function keys, are trapped by the PDT 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 F "Keyboard Reference".

3.VII Screen and display

The displayed cursor reflects the keyboard state (see 3.VI Keyboard Operation).

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 [EMULATION] section).

PDT have a display with 8 or 16 lines and 20 or 21 rows. WTNVT allows to use it  in "double height" (show 8 lines in a 16 lines terminal) to increase text visibility (and / or "double width").

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 PDT 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 needs to learn functions keys to scroll, and understand the "Logical Scroll" system.

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

User may move too the display area into the screen by using "Logical Scroll Keys".

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 it by a "Bios Boot" command. See Appendix F.II Boot sequences.

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