<div dir="ltr"><div><div><div><div><div><div><div><div><div><div><div>Thanks Steve,<br><br></div>First, this radio does not roll when the channel hits 1. So I could essentially reset the value to channel 1 every time I want to change channel.<br><br></div>Second, even if it did roll back to channel 16 after it pased below 1, I don't see why that would be a problem. I am sure there will be error sometimes, but for my application, I will mainly be remoting to repeaters anyway, and I will immediately know if I have the wrong repeater by the courtesy tone and ID.<br><br></div>This is my idea:<br></div>1. Store a file in the hard drive containing the current channel. <br></div>2. Set a remote DTMF code for each channel (or one code to increase and one code to decrease)<br></div>3. Skip to the certain channel based on the current value and the DTMF code parameters<br></div>4. Save the current value again.<br><br></div>As long as the current value is saved, even a power outage should keep the radio synced up with the computer.<br><br></div>That works unless:<br></div>The radio resets to channel 1 on power restart. In this case, I would just set another GPIO pin to reboot the radio and then I would always know what channel one is.<br><br></div>Any comments? I am assuming the error would be extremely low as long as the script just slowly cycles through the chanels and proper RF filtering measures are taking.<br><div><div><div><div><br><br></div><div>By the way, can someone give me a list of good VHF/UHF radios with many channels where AllStar could digitally control the frequency through a data port?<br></div><div><br></div></div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Feb 2, 2016 at 9:06 PM, Steve Passmore <span dir="ltr"><<a href="mailto:k6kya@hokeynet.net" target="_blank">k6kya@hokeynet.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">I did a quick google search and it appears that radio uses a rotary encoder. Does not have microphone buttons and I'm sure doesn't support cat protocols.</p>
<p dir="ltr">You should be able to emulate the rotary encoder. Do a Google search of it. There are examples of doing it with an arduino which should be about the same. The hard part might be determining what channel you are on unless you're lucky and the channels don't roll over to the first when you reach the end of the list</p>
<p dir="ltr">Steve</p>
<div class="gmail_quote">On Feb 2, 2016 7:22 PM, "Steve" <<a href="mailto:kb9mwr@yahoo.com" target="_blank">kb9mwr@yahoo.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">That depends on a number of things. Unless you are planning on just emulating pulses for the microphone up down buttons.<br>
<br>
If the radio supports some sort of remote tuning (CAT / CIV etc) then it can be addressed digitally though that port.<br>
<br>
There is an excellent open source (Ham Radio Control Libraries) called hamlib that supports a number of radios that have native remote tuning support.<br>
<br>
As for the remote knob, you'd likely want a digital(coded) rotary switch.<br>
<br>
Know that you know what the knob is called you can research how it translates its position to a digitally coded word that could easily be read in to GPIO/etc. On the other end you'd need to take that word and convert it back to a properly formatted CIV/CAT command, or series of microphone up down puleses. etc.<br>
<br>
Another possibility that is not as well documented for radio that don't support native CIV/CAT tuning is to look into how the Swedish Remote Rig intercepts and emulates TTL signaling on radios that have remote mounting. I have always admired the somewhat pricey thing and have been meaning to try and serial sniff my own radio to possibly create my own.<br>
<br>
The ARRL has an okay book sort of on this topic called "Remote Operating for Amateur Radio" While its not real technical, you'd lkely pick up a few things from it. I<br>
<br>
Hopefully this gives you a good starting place for things to further read up on. Good luck. I do believe this is an area of the hobby that needs more attention (with restrictive antenna ordinances for many), so please consider sharing anything you discover.<br>
<br>
73<br>
Steve, KB9MWR<span class=""><br>
<br>
> Is there any way to use GPIO to tell a radio with a turning knob which<br>
> channel to switch to?<br>
><br>
> Want to use a Kenwood TK-805D for a remote base (this is a 16 channel<br>
> radio), but the problem is that I don't have a way to simulate a knob spin.<br>
> Does anybody know how these knobs work, and without a mechanical servo how<br>
> to tell the radio to switch channels?<br>
><br>
> 73<br>
> Skyler KD0WHB<br>
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You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem. <br></blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature"><div dir="ltr"><font face="arial narrow, sans-serif" color="#38761d">Skyler Fennell</font><div><font face="arial narrow, sans-serif" color="#38761d"><a href="http://amsatnet.info" target="_blank">amsatnet.info</a></font></div><div><font face="arial narrow, sans-serif" color="#38761d">KDØWHB</font></div><div><font face="arial narrow, sans-serif" color="#38761d"><a href="mailto:electricity440@gmail.com" target="_blank">electricity440@gmail.com</a></font></div></div></div>
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