Belini

receive COM1 port data on two scripts at the same time (Solved)

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#1 ·  Posted (edited)

I am using this UDF https://www.autoitscript.com/forum/topic/155674-commapi-serial-and-parallel-communication-with-windows-api/ to send and rebeber data from COM1 and works great but I need to receive the same data in two scripts open at once, you can do this without opening the same door two times?

Edited by Belini

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AFAIK the OS won't let you open the same COM port (physical or virtual [USB]) by more than a single process at a time. This isn't true for block devices but serial ports aren't block type.

Have one script handle the port and use IPC to communicate with the two "real" scripts. That or one master and one slave. If that was allowed, what would occur if process A sets baud rate 2400, 8-bit, even parity, Xon/Xoff while process B sets baud rate 115200, 7-bit, no parity, hardware handshake and both processes write at the same port concurrently? Havoc!


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This may even be the solution but I do not know how this communication between the two scripts you have any tips for me?

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Any fast enough IPC will do. For instance search the forum for MailSlot by trancexx.

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This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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@jchd mailslot solved my problem, thank you for the tip and thanks to the excellent @Trancexx UDF!

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