USB to RS232 converters

Discussion in 'General Electronics Chat' started by xxxyyyba, Nov 6, 2015.

  1. xxxyyyba

    Thread Starter Member

    Aug 7, 2012
    249
    2
    Hello.
    I bought notebook few days ago and of course it doesn't have serial port :)
    I'm interested in satellite technology and most satellite receivers use serial port for communication with computer. That's why I need serial port.
    Since my notebook doesn't have it, only solution is to use USB to RS232 converter. Can it completely "mimic" serial port which can be found on older PC motherboards? Are there some limitations?
    Best regards
     
  2. AnalogKid

    Distinguished Member

    Aug 1, 2013
    4,535
    1,251
    I tried many 4 years ago. For simple serial comm most worked interchangeably. For hardware handshaking (CTS and RTS lines, etc.) most low cost adapters didn't work well, or at all.

    ak
     
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  3. xxxyyyba

    Thread Starter Member

    Aug 7, 2012
    249
    2
    For communication with receiver, I use null modem cable, which uses pins 2, 3 and 5. Scheme: 2-3, 3-2, 5-5. So USB to RS232 should have TXD, RXD and Signal Ground lines. My idea is to connect USB to RS232 to notebook (USB connector), RS232 connector to one side of null modem, and second side of nullmodem to satellite receiver. Can it work on this way?
     
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,542
    2,369
    Yes if the protocol uses software handshake, XON/XOFF, or none, then you should be OK.
    There are few applications now that use H.W. handshake.
    For handshake jumpered on the 9 pin side is 7-8 & 1-4-6.
    Max.
     
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  5. cmartinez

    AAC Fanatic!

    Jan 17, 2007
    3,572
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    Yes it can... but you MUST make sure that what you have is a converter using an FTDI chipset, and NOT Prolific.
     
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  6. xxxyyyba

    Thread Starter Member

    Aug 7, 2012
    249
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  7. cmartinez

    AAC Fanatic!

    Jan 17, 2007
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  8. cmartinez

    AAC Fanatic!

    Jan 17, 2007
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  9. xxxyyyba

    Thread Starter Member

    Aug 7, 2012
    249
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    There are tools for flashing receivers already on web...
     
  10. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,542
    2,369
    I sold off all my satellite equipment with the advent of Nagra3, now I see it has been cracked?
    Anyway I have an Android unit internet source now via Kodi etc.
    Max.
     
  11. xxxyyyba

    Thread Starter Member

    Aug 7, 2012
    249
    2
    There are rumours it's hacked, but there are no public emulators available yet.
     
  12. Techno Tronix

    Member

    Jan 10, 2015
    140
    10
    The USB_RS232 cables are a family of USB to RS232 levels serial UART converter cables incorporating FTDI’s FT232RQ USB to serial UART interface IC device which handles all the USB signalling and protocols. Check with this.
     
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