hello.
sorry for my bad english. 
I'm from Georgia.
I am a beginner programmer.
i want write delphi app for arduino serial com port communication. I searched example code for delphi and comport library, ComPort Library download | SourceForge.net but i don't know how to path library in delphi 7 or delphi xe3 and DCU.
plz. plz plz give me step by step instructions for this. Thank you in advance. 
Here is something I coded a while back - Delphi 5 and using the synaser library.
The little delphi program allowed me to send a single line to the Arduino or a whole file. The Arduino send XON/XOFF to slow down the pc.
NB: This just for you to look at (copy if you want to) and experiment with, but I dont have time to explain it all.
CtlXY.dpr (192 Bytes)
Form.dfm (3.44 KB)
Form.pas (7.37 KB)
CtlXY.res (876 Bytes)
plz Tell me how to install Synaser library in delphi 5 or delphi 7, delphi xe2
Msquare:
(copy if you want to) and experiment with, but I dont have time to explain it all.
The link to the synaser library is in the comments : http://synapse.ararat.cz/files/synaser.zip
Hi There,
This is what i have created with delphi xe3 and TComPort component.
Check this out : The My Frugal Home™ Forum - Index page
The comport component is here :
I think i understand you have trouble installing the component, just follow the instructions, and the only "paths" i added are these :
Lets hope more people are going to help us out with the Delphi side of it 
Good luck.
Alphons
It's pretty straight forward... i'm not at my desktop so i can't provide code atm...
You open up a handle to a file (which happens to be the com port) and off it goes... (read my id lol)
You own both Delphi 7 and XE3 but don't know how to set library paths?
Seems legit.
var
Form1: TForm1;
ComFile: THandle;
implementation
{$R *.DFM}
function OpenCOMPort: Boolean;
var
DeviceName: array[0..80] of Char;
begin
{ First step is to open the communications device for read/write.
This is achieved using the Win32 'CreateFile' function.
If it fails, the function returns false.
Wir versuchen, COM1 zu öffnen.
Sollte dies fehlschlagen, gibt die Funktion false zurück.
}
StrPCopy(DeviceName, 'COM1:');
ComFile := CreateFile(DeviceName,
GENERIC_READ or GENERIC_WRITE,
0,
nil,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
0);
if ComFile = INVALID_HANDLE_VALUE then
Result := False
else
Result := True;
end;
function SetupCOMPort: Boolean;
const
RxBufferSize = 256;
TxBufferSize = 256;
var
DCB: TDCB;
Config: string;
CommTimeouts: TCommTimeouts;
begin
{ We assume that the setup to configure the setup works fine.
Otherwise the function returns false.
wir gehen davon aus das das Einstellen des COM Ports funktioniert.
sollte dies fehlschlagen wird der Rückgabewert auf "FALSE" gesetzt.
}
Result := True;
if not SetupComm(ComFile, RxBufferSize, TxBufferSize) then
Result := False;
if not GetCommState(ComFile, DCB) then
Result := False;
// define the baudrate, parity,...
// hier die Baudrate, Parität usw. konfigurieren
Config := 'baud=9600 parity=n data=8 stop=1';
if not BuildCommDCB(@Config[1], DCB) then
Result := False;
if not SetCommState(ComFile, DCB) then
Result := False;
with CommTimeouts do
begin
ReadIntervalTimeout := 0;
ReadTotalTimeoutMultiplier := 0;
ReadTotalTimeoutConstant := 1000;
WriteTotalTimeoutMultiplier := 0;
WriteTotalTimeoutConstant := 1000;
end;
if not SetCommTimeouts(ComFile, CommTimeouts) then
Result := False;
end;
{
The following is an example of using the 'WriteFile' function
to write data to the serial port.
Folgendes Beispiel verwendet die 'WriteFile' Funktion, um Daten
auf den seriellen Port zu schreiben.
}
procedure SendText(s: string);
var
BytesWritten: DWORD;
begin
{
Add a word-wrap (#13 + #10) to the string
An den übergebenen String einen Zeilenumbruch (#13 + #10) hängen
}
s := s + #13 + #10;
WriteFile(ComFile, s[1], Length(s), BytesWritten, nil);
end;
{
The following is an example of using the 'ReadFile' function to read
data from the serial port.
Folgendes Beispiel verwendet die 'ReadFile' Funktion, um Daten
vom seriellen Port zu lesen.
}
Function ReadText: string;
var
d: array[1..80] of Char;
s: string;
BytesRead, i: Dword;
begin
Result := '';
if not ReadFile(ComFile, d, SizeOf(d), BytesRead, nil) then
begin
{ Raise an exception }
end;
s := '';
for i := 1 to BytesRead do s := s + d[I];
Result := s;
end;
procedure CloseCOMPort;
begin
// finally close the COM Port!
// nicht vergessen den COM Port wieder zu schliessen!
CloseHandle(ComFile);
end;
end.
Change the com port and other details to match your own, then you can control it as though you're using the serial console..
ps to set the paths (Menu > Tools > Enviroment Options > Library, then add the path or your components wont be seen at compile time)
Was under the impression the format for the com port file name was
\\.\<COM PORT>
eg:
\\.\COM2
To OP: if you want to see the origin of cjdelphi's source code, have a look here: SwissDelphiCenter.ch : ...write/read a string to/from the serial port?
You'll also probably need to Use Windows at the very least to get access to Windows function calls.
try this method,its working all Delphi XE release >> http://www.recepboydak.com/2014/04/delphi-xe5xe6-icin-cportlibcomport.html[/table]
I have a GPS receiver that outputs RTCM correctins over a serial port but only handles CTS-RTS flow control. I need to transform this flow control into an Xon Xoff type so I can connect it to another instrument that only works with Xon Xoff. I was told using an Arduino board could be possible to do it. Any suggestions?
I have a GPS receiver that outputs RTCM correctins over a serial port but only handles CTS-RTS flow control. I need to transform this flow control into an Xon Xoff type so I can connect it to another instrument that only works with Xon Xoff. I was told using an Arduino board could be possible to do it. Any suggestions?