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As of 2025-07-24

TWE Programmer

A TWELITE flashing and terminal tool for Windows

TWE Programmer is a utility for flashing firmware to TWELITE series wireless microcontrollers and connecting to the terminal.

Consider using the TWELITE STAGE App, which includes a build function and supports multiple platforms.

Installation

Download TWE-Programmer.exe from our website and copy it to any location.

Operating Environment

Developed and tested under the following environment:

Version	OS	.NET
v3.8.1	Windows 10 Pro 1809	v4.0.30319

Operation has also been reported to succeed on Windows 11.

Dependencies

FTDI Driver

You may need to install the FTDI serial converter IC driver used in TWELITE R and MONOSTICK.

Launch

Launch TWEProgrammer.exe by double-clicking it, like any standard application.

The software searches for MONOSTICK or TWELITE R on startup. You cannot choose which device to open if multiple are connected. If it fails to launch due to too many connected devices on the USB bus, try disconnecting others.

Flashing Firmware

Selecting the COM Port

Select the COM port connected to TWELITE R or MONOSTICK with a TWELITE module.

If TWELITE is properly recognized, the serial number printed on its surface will be displayed.

Selecting the Firmware

Press the button to select a file or drag a .bin file to load and begin firmware flashing. If a previously selected file still exists, you can press the “(Re)Write” button to reflash it.

If “Connect to Terminal” is checked, TWELITE will be automatically reset and the terminal screen will be displayed.

Options

`Slow Write (Safe Mode)`

Applies safer settings. Usually not needed.

`Verify`

Verifies the data after flashing.

Connecting to the Terminal

Baud Rate Configuration

The baud rate can be changed from the “Terminal” section. The setting uses 8N1 format.

Connecting the Terminal

To use only the terminal without flashing, check “Connect to Terminal” and press “Reset TWELITE”.

Pressing Alt+R will reset TWELITE. To connect without resetting, press Alt+N.

On startup, the device automatically enters programming mode. You can disable this behavior via settings.

Disconnecting the Terminal

Click “Disconnect Terminal” or press Alt+I.

Shortcuts

Function	Key Combination	Remarks
Disconnect Terminal	`Alt+I`	Or the “Disconnect Terminal” button
Connect Terminal (normal)	`Alt+N`	Connect without reset
Connect Terminal (reset)	`Alt+R`	Connect with reset
Hardware Reset	`Alt+R`
Send `+++`	`Alt+P`	Or the `+ + +` button. Used to enter interactive mode
Change Terminal Display Color	`Alt+G`	Only when connected
Clear Terminal Display	`Alt+L`	Or the `clear` button
Copy Display Contents	`Alt+C`	Or the `copy` button
Paste from Clipboard	`Alt+V`
Open Firmware File	`Ctrl+Alt+O`	Disabled while connected to terminal
Reflash Firmware	`Ctrl+Alt+W`
Erase Firmware	`Ctrl+Alt+E`	Disabled while connected to terminal
Change Terminal Rendering Mode	`Ctrl+Alt+D`	Switch to double-buffer mode. Cursor hidden, may cause rendering issues
Exit TWE Programmer	`Ctrl+Alt+X`

The following escape sequences are also supported:

Function	Key Combination
Move cursor up one line	`ESC[A]`
Move cursor to beginning of line	`ESC[G]`
Move cursor to home position	`ESC[H`
Clear screen	`ESC[2J`
CR / Move cursor to beginning of line	`\r`

Logging

To log terminal input and output, check “Save Terminal Log” before connecting.

Not intended for long-term recording.

A log file named twelog.log will be saved in append mode in the same folder as TWE-Programmer.exe.

Input and output logs may occasionally be out of order due to timing.

To obtain multiple logs simultaneously, install TWE-Programmer.exe in separate folders.

Input/Output Format

The following format is used for saving:

Character	Description
Printable ASCII characters (excluding backslash `\`)	excluding backslash `\`
Backslash `\` (0x5C)	converted to `\\`
Others	represented in hexadecimal

Input from PC to TWELITE is enclosed in escape sequences to distinguish it from TWELITE’s output.

Input start: ESC[7m]
Input end: ESC[0m]

These escape sequences correspond to inverted display in ANSI terminals. Use a compatible viewer (e.g., less -r twelog.log) to improve readability.

Settings

Several settings can be configured via command-line options at startup.

Parameter	Description
`-v`	Enable verify
`-c`	Disable auto-connect after startup
`-s`	Enable slow write (safe mode)
`-D`	Enable double buffer Reduces flickering but hides cursor and imposes limitations
`-g [num]` `--color [num]`	Specify text color (`0` for none) `0`: Pink/Wine `1`: Orange/Black `2`: Green/Black `3`: Black/White `4`: White/Wine `5`: Wine/Yellow `6`: White/Blue
`[file]`	Specify firmware file to load

You can create a program shortcut and add command-line options via its properties.

Error Output

If an error occurs during flashing, the screen will turn pink as shown below. Check the connection and press “(Re)Write”.

Errors also occur if another software is using the COM port. Close the software using the port, then press “Recheck Connection”.