LazSerial v0.6
Serial Port Component for Lazarus 
by Jurassic Pork  03/2013 03/2022 
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
   paco@fe.up.pt
 
- Synaser library  by Lukas Gebauer 
- TcomPort component 

 new in v0.3 version
 Add conditional macros for cpuarm rpi in lazsynaser.pas
 Hide Active property from IDE Object inspector              
 
 new in v0.4 version (02/2021)
 DeviceClose procedure fixed
 
 new in v0.5 version (03/2021)
 Memory leak on get_serial_port_names in lazsynaser.pas fixed

 new in v0.6 version (03/2022)
 Fixes for OS-X (thanks to rphoover), SynSer(synaser) properties now persistent, v0.3 of GPS simulator
 On OS-X you must set the property  SynSer/NonBlock to True  in the properties of TLazserial 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 10 and Ubuntu 20.04  Lazarus 2.0.10
                                       
if you haven't serial ports in your PC you can use virtual ports :
1 - WINDOWS 
To simulate  a paired serial ports on  windows : com0com   
ex : 

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
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ScreenShot here : https://user-images.githubusercontent.com/9909302/160068324-3467fac2-90e4-4625-9bfb-9cc0ef058bad.PNG