Because Sscom is freeware distributed by individual authors rather than a major corporation, it is often repackaged on third-party "download manager" sites (e.g., Softonic, CNET Download.com, UpToDown) that bundle adware, toolbars, or worse—actual malware.
Connect your device (e.g., Arduino) to your PC using a USB-to-TTL adapter. Open . Select the correct COM Port from the dropdown menu. Set the Baudrate to match your device (e.g., 115200). Click Open . 2. Sending Data Type your command in the text box at the bottom. Select "SendNew" to add a newline character if required. Click "Send" . 3. Receiving Data Incoming data will automatically appear in the main window.
The software does not rely on third-party runtime libraries, making it truly portable and lightweight. It is built on the Windows API using standard serial control functions such as CreateFile , SetupComm , SetCommState , GetCommState , and PurgeComm . Sscom V5.13.1 Download English
This error indicates the port is either being used by another program (like the Arduino IDE Serial Monitor) or the driver for your USB-to-Serial chip is missing. Close conflicting software or reinstall your CH340/FTDI drivers.
: Trusted by developers for hardware labs and production testing. Because Sscom is freeware distributed by individual authors
Whether you are sending
What you are plugging in The baud rate your firmware code uses Select the correct COM Port from the dropdown menu
. It is widely used by engineers to test embedded devices like Arduinos, microcontrollers, and IoT modules.
Sscom is a free, lightweight serial port debugging assistant designed for Microsoft Windows. Unlike general-purpose terminal emulators, Sscom is built specifically for engineers and hobbyists who need to send and receive hex or ASCII data over RS-232 or virtual COM ports (e.g., USB-to-UART adapters). Its core strengths are its simplicity—an uncluttered interface that fits on a small monitor—and its ability to handle high-speed data transmission without CPU overload.
SSCOM allows you to set up automatic periodic messages.
Built-in tools to send large text or binary files directly over the serial line.
