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TLazSerial : serial port component for Lazarus (windows and linux).

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Jurassic Pork:
TLazSerial          EDIT  (02/2021) :   new version v0.4 in Github here   and OPM
Serial Port Component for Lazarus (windows and linux).
by Jurassic Pork  03/2013
This library is Free software; you can rediStribute it and/or modify it
  under the terms of the GNU Library General Public License as published by
  the Free Software Foundation; either version 2 of the License, or (at your
  option) any later version.

  This program is diStributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; withOut even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
  for more details.

  You should have received a Copy of the GNU Library General Public License
  along with This library; if not, Write to the Free Software Foundation,
  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. }

 Based on  :
- SdpoSerial v0.1.4
  CopyRight (C) 2006-2010 Paulo Costa
- Synaser library  by Lukas Gebauer
- TcomPort component

Features :
Changed :  baudrate values.
           stop bits  new value : 1.5
new event : onstatus
new property FRcvLineCRLF : if this property is true, you use RecvString
in place of RecvPacket when you read data from the port.

new procedure  ShowSetupDialog to open a port settings form :
the device combobox contain the enumerated ports.
new procedure to enumerate real serial port on linux ( in synaser).

Demo : a simulator of serial port gps + serial port receiver :
you can send NMEA frames ( GGA GLL RMC) to the opened serial port
(start gps simulator). You can change speed and heading.
In the memo you can see what is received from  the opened serial port.
In the status bar you can see the status events.

tested with windows 7 and Ubuntu 12.04
if you haven't serial ports in your PC you can use virtual ports :
To simulate  a paired serial ports on  windows : com0com   

2 - Linux
To simulate  a paired serial ports on linux : socat
ex :  socat -d -d PTY: PTY:

To connect to a bluetooth GPS on Linux
echo connection to a  bluetooth GPS(/dev/rfcomm0)

sudo rfcomm bind  0 xx:xx:xx:xx:xx:xx 1

How to install the component ( lazarus version >=  1.x) : 

1 - Download the file LazSerial.7z (you must be logged in the forum  to see and download the file).

2 - Open the file and uncompress it in the Lazarus/components directory.

3 - Open Lazarus IDE ,  Open the package ( packages/open a package file) LazSerialPort.lpk

4 - Compile

5 - Install


Sorry for my poor english but it isn't my natural language.

to be continued if it is usable ....


yes this is very useful

Awesome Programmer:
 :D :) Yes this is very very very useful tool. Thanks, J.P. for making it available to the Lazarus community.

Thanks a lot JP, this will be very useful. :D

Components under GPL are not ideal.  Usually units/components are LGPL (and preferably with exception, like FPC and Lazarus themselves)


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