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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Anti-Spam Code: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by DrKlein[/i] [br]Origin Version (Select Help-->About Origin): 7.0 Operating System: Windows 2000 Hi, I am trying to transmit data to an external device, connected to the computer via the RS-232 port (in my case: COM 1) What I eventually want to do is clicking into a .bmp image, imported into Origin and having Origin send the coordinates to an external device, which moves to this position. Anyway, my problems start much earlier: I tried to communicate with a simple RS-232 device, tried the file RS232commands.c from the data exchange site and the RS232.c file shipped with Origin itself.Neither worked. Communication with Microsoft "Hyperterminal" works, though. Required RS-232 Settings are Baud Rate: 9600 Parity: none Data bits: 8 stop bits: 1 I tried commands like (RS232commands.c): rs_open(1); rs_write("*rst\n"); result: COM1 was opened successfully. (nothing else) or with RS232.c: rso 1; rsw "*rst\n"; result: COM1 was openned successfully. 6 bytes chars have been sent COM. The command for the device is *rst and \n is the message terminator. Is the message terminator maybe the problem ? I tried it with and without. In order to get to the final goal (clicking and transmitting via RS232, is Winedge maybe the better choice for that task ? Sincerely Oliver Kiowski [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.