<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>I did this years ago. I don't have my configuration files and more, but that I did was use 2 gpio outputs and created macros for them. First it would pulse the first output to hit the home button so it would default to channel one and then pause and use the 2nd output to pulse the number of channels I wanted. I never had any troubles with it. I think I used either a maxtrac or a gm300, but I can't remember at this time which one for sure.<br><br>Corey. N3FE</div><div><br>On Jun 10, 2015, at 9:53 AM, Skyler F <<a href="mailto:electricity440@gmail.com">electricity440@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">Has anybody ever created a remote base with a radio like the SM120 16 channel commercial radio? Would it be possible to use the URI to specify the channel I want to go to, for example, hooking a GPIO pin to the "channel -" button and hooking another to the "channel +" button? So if I am on channel 1 and want to go to 7, the GPIO for "chan +" would have to pulse 6 times. That wouldn't be very reliable probably because there is no confirmation that you are actually on the right channel, but this is how I would do it:<div><br></div><div>When a channel change is requested, pulse 16 or more times on the "chan -" button to make sure it is on channel 1. Then count the + button up to the channel number you want to go to. That idea, however wouldn't work on the SM120 because going below channel 1 brings you back to 16. </div><div><br></div><div>Another idea I have is put one channel on a frequency reference (maybe those 150mhz re-broadcasts of radio stations?) and then find the channel you want based on that reference. </div><div><br></div><div>Another idea yet would be to use a few more GPIO pins to see which elements of the 7-segment displays are lit up and then make an estimate on which channel you currently are on. </div><div><br></div><div> Any other ideas? <br clear="all"><div><br></div><div><br></div><div>73</div><div>Skyler kd0whb</div><br><div class="gmail_signature"><div dir="ltr"><div><font face="arial narrow, sans-serif" color="#38761d"></font></div></div></div>
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