Lammert Bies – Computer Interfacing

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Lammert Bies – Computer Interfacing

Information about computers and how to interface them to all kind of equipment. Both software and hardware help is available. – Lammert Bies

  • RS-232 specs
  • RS-485 information
  • The serial UART
  • USB interface
  • Modbus interface
  • Unitronics RJ11

Simple null modem without handshaking

 

“only the data lines and signal ground are cross connected in the null modem communication cable. All other pins have no connection. An example of such a null modem cable without handshaking can be seen in the figure below.”

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