[arm-allstar] Fan Control

[Doug Crompton]

Ron,

 I l;ooked way back at that original email. While that should work there is
a slightly better way to do it....

Create this script at the Linux prompt -

cd /etc/asterisk/local

nano check_fan

Then enter this -  Change the 23's to another bit if you want

#!/bin/bash

gpio mode 23 out

if [ "$1" = "1" ]
  then
    gpio write 23 1
else
    gpio write 23 0
fi

Save it

Make the script executable

chmod 750 check_fan

Edit /etc/asterisk/rpt.conf

in the [eventsxxxxx] section add

/etc/asterisk/check_fan 1 = s|t|RPT_TXKEYED

Make sure in the node section you have

events=eventsxxxxx

The xxxxx is your node number

Restart Asterisk

astres.sh

Use  gpio readall   to test.  Example

unkeyed  - 23 shows 0

gpio readall

   5 |  21 | GPIO.21 |   IN | 1 | 29 || 30 |   |      | 0v      |     |
|
 |   6 |  22 | GPIO.22 |   IN | 1 | 31 || 32 | 0 | IN   | GPIO.26 | 26  |
12  |
 |  13 |  23 | GPIO.23 |  OUT | 0 | 33 || 34 |   |      | 0v      |     |
  |
 |  19 |  24 | GPIO.24 |   IN | 0 | 35 || 36 | 0 | IN   | GPIO.27 | 27  |
16  |
 |  26 |  25 | GPIO.25 |   IN | 0 | 37 || 38 | 0 | IN   | GPIO.28 | 28  |
20  |
 |     |     |      0v |      |   | 39 || 40 | 0 | IN   | GPIO.29 | 29  |
21  |
 +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
 | BCM | wPi |   Name  | Mode | V | Physical | V | Mode | Name    | wPi |
BCM |
 +-----+-----+---------+------+---+---Pi
3---+---+------+---------+-----+-----+

Keyed

|     |     |      0v |      |   | 25 || 26 | 1 | IN   | CE1     | 11  | 7
  |
 |   0 |  30 |   SDA.0 |   IN | 1 | 27 || 28 | 1 | IN   | SCL.0   | 31  | 1
  |
 |   5 |  21 | GPIO.21 |   IN | 1 | 29 || 30 |   |      | 0v      |     |
  |
 |   6 |  22 | GPIO.22 |   IN | 1 | 31 || 32 | 0 | IN   | GPIO.26 | 26  |
12  |
 |  13 |  23 | GPIO.23 |  OUT | 1 | 33 || 34 |   |      | 0v      |     |
  |
 |  19 |  24 | GPIO.24 |   IN | 0 | 35 || 36 | 0 | IN   | GPIO.27 | 27  |
16  |
 |  26 |  25 | GPIO.25 |   IN | 0 | 37 || 38 | 0 | IN   | GPIO.28 | 28  |
20  |
 |     |     |      0v |      |   | 39 || 40 | 0 | IN   | GPIO.29 | 29  |
21  |
 +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
 | BCM | wPi |   Name  | Mode | V | Physical | V | Mode | Name    | wPi |
BCM |
 +-----+-----+---------+------+---+---Pi
3---+---+------+---------+-----+-----+

23 shows 1

Then use bit 23 (or the bit you choose) to run the relay.  Remember these
bits are 3V high and 0 low and low current. You need to have a relay or
solid state relay that works with that.

*73 Doug, WA3DSP*
*http://wa3dsp.org <http://wa3dsp.org>*



On Tue, Apr 28, 2020 at 12:06 PM "Ron Gilson via ARM-allstar" <
arm-allstar at hamvoip.org> wrote:

> The script you wrote 10/2018.  I copied and paste hopefully not making any
> goofs ?  If this is not practical I can use a thermostat on the heat sink?
> Thanks for all your help.  Ron
>
>
> On Mon, Apr 27, 2020 at 9:22 PM "Doug Crompton via ARM-allstar" <
> arm-allstar at hamvoip.org> wrote:
>
> > Ron,
> >
> >   What info are you using for this? What script?
> >
> > *73 Doug, WA3DSP*
> > *http://wa3dsp.org <http://wa3dsp.org>*
> >
> >
> > On Mon, Apr 27, 2020 at 8:14 PM "Ron Gilson via ARM-allstar" <
> > arm-allstar at hamvoip.org> wrote:
> >
> > > Recently I built a suitcase repeater.  Since this is a battery operated
> > > repeater and power is limited, I decided to use the fan script.  After
> > > adding the fan_control.sh in the /etc/asterisk/local and adding
> > > local/fan_control.sh to rc.local along with the 3 lines to events I
> did a
> > > reboot but pin 33 bit 23 does not change after a ptt???  Have I missed
> > > something ?  Thanks
> > > Ron  WA2WWK
> > > _______________________________________________
> > >
> > > ARM-allstar mailing list
> > > ARM-allstar at hamvoip.org
> > > http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
> > >
> > > Visit the BBB and RPi2/3/4 web page - http://hamvoip.org
> > >
> > _______________________________________________
> >
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> >
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> >
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