Hagstrom Electronics USB-KM232 User Manual

Rs-232 controlled usb keyboard and mouse cable

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USB-KM232
RS-232 Controlled USB
Keyboard and Mouse Cable
User Manual

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Summary of Contents for Hagstrom Electronics USB-KM232

  • Page 1 USB-KM232 RS-232 Controlled USB Keyboard and Mouse Cable User Manual...
  • Page 2 This unit is may be used a variety of ways in order to meet your specific requirements. Please take a few minutes to read this manual before using your USB-KM232. If you have any questions about the use of the USB-KM232 not covered in this manual, please contact us. Send an email to, sales@hagstromelectronics.com...
  • Page 3: Table Of Contents

    CONTENTS Introduction to the USB-KM232 Quick Setup Producing Mouse Action on the Target PC Producing Keystrokes on the Target PC US Key Number Table Additional Keyboard Control Commands Serial Connector Pinout USB-KM232 Specifications Accessories Custom Options USB-KM232...
  • Page 4: Introduction To The Usb-Km232

    USB-KM232 cable to the serial port of the computer or device which will send the serial data to the USB-KM232. 3) The USB-KM232 is now ready to be used. Send and receive serial data using the single byte commands outlined on the following pages.
  • Page 5: Producing Mouse Action On The Target Pc

    0x4D = Middle Button On 0xCD = Middle Button Off After each command is sent to the USB-KM232, a response code is returned by the USB-KM232, which is the one’s complement of the command received. Use this response byte to indicate when the next command may be sent to the USB-KM232.
  • Page 6: Producing Keystrokes On The Target Pc

    “make” or press and hold of the “1” key. Sending a byte with a value of 130 (0x82) will result in the release of the “1” key. The USB-KM232 responds to each byte received with a byte which is a one’s complement of the byte received. Use this response as the indication that the next byte may be sent to the USB-KM232.
  • Page 7: Key Number Table

    Scrl Lk Dn Arrow Pause/Break Page Up Page Dn When sending data to the USB-KM232 to generate keystrokes use the values shown to produce the “make” and “break” code for the corresponding key. Serial Protocol = 9600, 8, N, 1...
  • Page 8: Additional Keyboard Control Commands

    0x7F - Status LED Read Command. Sending 0x7F to the USB-KM232 serial port results in the return of a character in the range of ASCII “0”...
  • Page 9: Serial Connector Pinout

    Serial Connector Pinout The USB-KM232 serial connection is a 9 pin female D type connector. The pinout is designed such that it will attach directly to a standard PC com port. Pin 1 = Unused Pin 2 = Serial Data out of USB-KM232...
  • Page 10: Accessories

    Accessories KE-DB9MF 9 pin serial DB9 cable. 6 ft., Male to Female configuration. Can be used with the USB-KM232 to extend the length of the serial connection. Custom USB-KM232 Options We offer custom and special modifications to our standard USB-KM232 unit to conform to your exact specifications. Potential modifications include, but are not limited to: special cable lengths, RS-422, etc.
  • Page 11: Warranty

    Depending on the state in which you live, you may have additional rights. Great care has been taken during the assembly, testing, and burn-in of your USB-KM232 to ensure its performance. If you have any questions, please send us an email.
  • Page 12 HAGSTROM ELECTRONICS, INC. sales@hagstromelectronics.com www.hagstromelectronics.com Copyright © 2025 HAGSTROM ELECTRONICS, INC. V. 10.20...
  • Page 13 International Key Number Table (Decimal Values) Make Break German Make Break German Canadian Canadian French French `|¬ ^° É´ 1±! R Shift R Shift R Shift 2” 2@” 2²” L Ctrl L Ctrl L Strg 3£ 3£/ 3³§ 4¢$ Space Space Space 5¤%...

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