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<body class='hmmessage'><div dir='ltr'><font style="" color="#000000" face="Tahoma,sans-serif">Jay,<br><br> Read the GPIO howto on the hamvoip.org web page. It is easy on the RPi2. You can access the GPIO pins through a script via DTMF to control anything you want. Let me know if you are not getting how to do it after you read the howto. I could give more detail in your specific case. <br><br>Remember the GPIO pins on the Pi are 3.3v logic. They would control 5V logic inputs as long as those inputs were not pulled high to 5V. Otherwise you need to use either a discrete or chip based level converter.<br><br>You could use a bit to turn PL on or off or actually use several bits to change the PL frequency.<br id="FontBreak"></font><br><font style="" face="Tahoma,sans-serif">I wrote a script for a ham in FL for a commercial project that controls radio frequency through RPi2 GPIO using DTMF. It is really quite trivial.</font><br><br><b><font style="font-size:16pt;" size="4">73 Doug</font><font style="font-size:16pt;" size="4"><br></font><font style="font-size:16pt;" size="4">WA3DSP</font><font style="font-size:16pt;" size="4"><br></font><font style="font-size:16pt;" size="4">http://www.crompton.com/hamradio</font></b><font style="font-size:16pt;" size="4"><br></font><br><br><div><hr id="stopSpelling">To: bdboyle@bdboyle.com; arm-allstar@hamvoip.org<br>From: wt9s@me.com<br>Date: Fri, 30 Oct 2015 21:57:41 -0700<br>Subject: Re: [arm-allstar] arm-allstar Digest, Vol 17, Issue 26<br><br><style><!--
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--></style><div class="ecxWordSection1">Thanks for the info guys. It looks like it should be easy enough to run a fan. BTW, I’m using an AC fan, AC switched by a solid state relay, which is turned on by transistor switched DC.<BR> <BR>The other thing I just noticed is the URI apparently does not have CTCSS encode on/off logic, is there some way of doing that with a GPIO pin? My repeater is a converted MastrExec II from Micro Computer Concepts, it has a TS-64 board installed for CTCSS encode/decode.<BR> <BR>Thanks,<BR> <BR>Jay – WT9S<BR> <BR>Sent from <a href="http://go.microsoft.com/fwlink/?LinkId=550986" target="_blank">Mail</a> for Windows 10<BR> <br><BR></div></div> </div></body>
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