boris.nihil

you are right, from small to big picture i think this will do: JSonObject := TJSonObject.Create; JsonValue := JSonObject.ParseJSONValue(memoRequest.Lines.Text); JsonValue := (JsonValue as TJSONObject).Get('b2GOutgoingInvoiceEnvelope').JSONValue; JsonValue := (JsonValue as TJSONObject).Get('b2GOutgoingInvoiceProcessing').JSONValue; JsonValue := (JsonValue as TJSONObject).Get('correctB2GOutgoingInvoice').JSONValue; JsonValue := (JsonValue as TJSONObject).Get('invoiceID').JSONValue;

ok..thanks a lot for all the help!

Thank a lot for a time you spend for this.. Solution 2 with timer works on some way...it's hard to work since i can't play with this device so i need to improvise.. Problem is that timer must work all the time until transaction is complete.. After i received message 'INSERT CARD' timer stops and i can't read anymore. Could you help me how to send some message from server I made with IdTCPServer1 component to Client program with some Button on server form ? Something like "AContext.Connection.IOHandler.Write"...

i tryed IdTCPClient1.IOHandler.InputBuffer.Clear; IdTCPClient1.IOHandler.Write(s + chr(strtoint(lrc)), IndyTextEncoding_8bit); and then i activate timer: if IdTCPClient1.IOHandler.InputBufferIsEmpty then begin if IdTCPClient1.IOHandler.CheckForDataOnSource(500) then begin receivedtext1 := IdTCPClient1.IOHandler.WaitFor(#6,true,true,IndyTextEncoding_8bit); memo1.SelStart := memo1.GetTextLen; memo1.SelLength := 0; memo1.SelText := 'Received ACK:' + receivedtext1 + #13#10; sleep(500); receivedtext := IdTCPClient1.IOHandler.WaitFor(#3,true,true,IndyTextEncoding_8bit); memo1.SelStart := memo1.GetTextLen; memo1.SelLength := 0; memo1.SelText := 'Received message:' + receivedtext + #13#10; end;

>> Though I suspect the POS is actually expecting binary data for the message content, not hex-encoded strings, so try something more like this: >> s := #2#2'000000000001000'#28'1000'#28#28'+0'#28'191'#28#28#28#28#28#28#28#28#28#28#28'00'#28'1'#12#28#28#28#28#28#28#28#28#3','; >> IdTCPClient1.IOHandler.Write(s, IndyTextEncoding_8bit); you were right, this works ! But now program hangs for a while waiting for some response or something.. How to receive ACK from POS terminal and other data from POS ? I need to send ACK after every returned answer from POS.. ECR-->POS: <STX><STX>303030303030303030303031303030<FS>31303030<FS><FS>2B30<FS>313931<FS><FS><FS><FS><FS><FS><FS><FS><FS><FS><FS>3030<FS>31<FF><FS><FS><FS><FS><FS><FS><FS><FS><ETX>2C POS-->ECR: <ACK> POS-->ECR: <STX>32303030303030305542414349204B415254494355<ETX>2E (insert CARD) ECR-->POS: <ACK> POS-->ECR: <STX>(CARD in process) ECR-->POS: <ACK> POS-->ECR: <STX>(wait) ECR-->POS: <ACK> POS-->ECR: <STX(aproved) ECR-->POS: <ACK> Maybe this code is not good ? answer := IdTCPClient1.IOHandler.ReadLn(); showmessage(answer ); Here is Protocol what POS terminal use..

thanks a lot for a help, i will try it tommorow and see...

no, it is connected to local network with fixed ip 192.168.1.23 and port 3000.. on POS screen its written: LISTEN 192.168.1.23:3000