[App_rpt-users] Remote Bases with 16 channel radios?

[Robert Newberry]

Ok I've done it on the GM300 using a pacific research controller. The GM300
use BCD binary coded decimal. Basically pulling certain pins low will cause
the radio to jump to the requested channel. It worked very slick. I know
this isn't specific to app_rpt but it should be doable. I also am not sure
on the SM120 if it does BCD. I will say it worked really slick. When the
controller heard a certain DTMF it would pull what ever combination pins
low and go to that channel. I'm pretty sure this can be done with app_rpt
it seems you can do just about anything you can dream up.

N1XBM
Apparare Scientor
Paratus Communicare
Allstar Node # 27086, 41540, 41812

On Jun 10, 2015 10:01 AM, "Corey Dean" <n3fe at repeater.net> wrote:

> 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.
>
> Corey. N3FE
>
> On Jun 10, 2015, at 9:53 AM, Skyler F <electricity440 at gmail.com> wrote:
>
> 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:
>
> 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.
>
> 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.
>
> 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.
>
>  Any other ideas?
>
>
> 73
> Skyler kd0whb
>
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