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USB or serial port switching


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Hello all,

does anyone know how to, using AutoIT, make a USB port or serial port go high/low?

Reason... I want to create some code to control either a USB cable or serial cable to control a switch or relay.

Any help greatly appreciated.

David

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Years back, I wanted to do so, and found http://kr3l.wordpress.com/2008/12/07/serial-com-port-communication-with-autoit/. Also, you could use

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:bye: Hey there, was I helpful?

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My Current OS: Win8 PRO (64-bit); Current AutoIt Version: v3.3.8.1

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If you're looking for direct digital I/O as opposed to communicating to a microcontroller over RS232, I believe parallel ports have better hope. Don't know how to best interface AutoIT for that purpose though. Try looking around. You can get USB parallel ports if you need one.

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Be aware that neither serial nor parallel ports will be able to drive a typical relay themselves, you will most probably need a power stage driver (transistor). If using a serial line, avoid feeding it directly to the base of a power driver (negative voltage would fry unprotected devices) !

BTW, there are many very cheap I/O boards available offering many possibilities. Look there too!

Edited by jchd

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Ascend4nt posted a useful UDF (for parallel ports). Check this post:

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:bye: Hey there, was I helpful?

----------------------------------------

My Current OS: Win8 PRO (64-bit); Current AutoIt Version: v3.3.8.1

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