[arm-allstar] Fan Control Using URI (or RIM) I/O

Wed Aug 31 11:19:27 EST 2016

I realize it is a fun project to play with software and hardware but is it really worth all this effort to just turn a fan off and on? I run muffin fans on all my nodes but they stay on all the time. With some I have reduced the speed with a resistor - 10-50 ohm 1/2w. 

Is the object here to save energy? Extend fan life? Why not just leave it run all the time? If you really want to protect from heat you would use a thermostat attached to the heat sink. A timed fan really has no idea what the temperature really is and so many other things enter into the equation like ambient temperature. Many transceivers get hot even sitting in receive in high ambient temperatures. 

If you have something better to do (and I do) save yourself the trouble and just leave the fan run. DC muffin fans draw very little current and last a very long time.
73 Doug
WA3DSP
http://www.crompton.com/hamradio

Date: Tue, 30 Aug 2016 18:28:59 +0000
To: arm-allstar at hamvoip.org
Subject: Re: [arm-allstar] Fan Control Using URI (or RIM) I/O
From: arm-allstar at hamvoip.org
CC: n7jys at yahoo.com

After following all the instructions I  find this script does not start on a keyup.
In doing some hacking on the app_rpt_fan.sh I can make it work by replacing
PTTSTATE="/tmp/RPT_TXKEYED$1"  with
PTTSTATE="/tmpRPT_TXKEHED42285"   (42285 my node) and
FANON="/usr/bin/asterisk -rx \"rpt fun $1 *880\""  with
FANON="/usr/bin/asterisk -rx \"rpt fun 42285 *880\""   and

FANOFF="/usr/bin/asterisk -rx \"rpt fun $1 *881\""  with

FANOFF="/usr/bin/asterisk -rx \"rpt fun 42285 *881\""  

The file that get's written and removed from the tmp directory is
 [events 42285]
touch /tmp/RPT_KEYED42285 = s|t|RPT_TXKEYED
rm -f /tmp/RPT_KEYED42285 = s|f|RPT_TXKEYED
work fine.  In a test script PTTSTATE="/tmp/RPT_TXKEYED$1" tells me
file or directory does not exist even though I can see it on a keyup and  command
ls /tmp. Why is it not liking $1? 

 Eric (N7JYS) Marshall's Communications

       From: Roselito de los Reyes via arm-allstar <arm-allstar at hamvoip.org>
 To: ARM Allstar <arm-allstar at hamvoip.org> 
Cc: Roselito de los Reyes <tolitski at hotmail.com>
 Sent: Friday, August 26, 2016 5:31 PM
 Subject: Re: [arm-allstar] Fan Control Using URI (or RIM) I/O

Hi John,I did try to recreate the issue using the Hamvoip code and I was able to create the state file in the '/tmp' folder.  and from there you can reference that location in the script that K0KN has written.This is what I added in the rpt.conf file inside your node stanzaevents=events1968 ; change 1968 to your own node number or don't put oneAfter the node stanzas in the rpt.conf file, add this :[events1968]touch /tmp/RPT_TXKEYED1968 = S|T|RPT_TXKEYEDrm -f /tmp/RPT_TXKEYED1968 = S|F|RPT_TXKEYEDThen on the txfan script change the followingPTTSTATE="/dev/shm/~pttstate" toPTTSTATE="/tmp/RPT_TXKEYED1968"This should work using the HamVOIP version.73,Lito KI9HDate: Fri, 26 Aug 2016 17:18:38 -0500To: arm-allstar at hamvoip.orgSubject: Re: [arm-allstar] Fan Control Using URI (or RIM) I/OFrom: arm-allstar at hamvoip.orgCC: wb5nfc at gmail.comThanks for the info, Roselito. One of the things I have not been able to resolve is a reference to a folder that does not exist. At first, I thought that it was just a difference in the distributions (I'm using RPi2-3 V1.02beta - with simpleusb - but attempting to follow the instructions on the latinovoip site). So I downloaded the latinovoip distro maintained by KP4TR, unzipped it, loaded it on a fresh micro SSD card, and booted it. I then went looking for the /etc/asterisk/local folder... but it does not exist in that version, either. The /etc/asterisk/local folder is mentioned a couple of times in the instructions on the latinovoip site...J. On Fri, Aug 26, 2016 at 4:51 PM, Roselito de los Reyes via arm-allstar <arm-allstar at hamvoip.org> wrote:

John,Also, make sure the file that you're monitoring ie. PTTSTATE="/dev/shm/~pttstate" is in the right folder. the Latinovoip version is located in /tmp73Lito KI9HTo: arm-allstar at hamvoip.orgDate: Fri, 26 Aug 2016 14:44:05 -0700Subject: Re: [arm-allstar] Fan Control Using URI (or RIM) I/OFrom: arm-allstar at hamvoip.orgCC: tolitski at hotmail.com

my mistake .. it looks like you DO have to make changes to your rpt.conf file to create the /dev/shm/~pttstate file.LitoTo: arm-allstar at hamvoip.orgDate: Fri, 26 Aug 2016 14:42:40 -0700Subject: Re: [arm-allstar] Fan Control Using URI (or RIM) I/OFrom: arm-allstar at hamvoip.orgCC: tolitski at hotmail.com

John,the k0kn version refers to an old code from the Acid release. it looks like a file is generated whenever the PTT is pressed and that is what K0KN's code is looking for. I don't think this is valid with the HamVOIP code. I could be wrong.73,Lito KI9HDate: Fri, 26 Aug 2016 16:01:08 -0500To: arm-allstar at hamvoip.orgSubject: [arm-allstar] Fan Control Using URI (or RIM) I/OFrom: arm-allstar at hamvoip.orgCC: wb5nfc at gmail.comCan anyone point me in the direction of documentation on how to set up a node radio cooling fan using an I/O port on a URI or RIM? I don't want to use a temperature sensor.I've found the K0KN script (http://www.qsl.net/k0kn/txfan ), but I'm not having any luck making it work. I've looked through the How To's on the ARM Allstar site, but I'm only finding info for using USB with a FTDI chip. Thought I could figure it out with info from http://latinovoip.net/ allstar-and-the-gpio-fan- script-for-dmk-engineering- uri/  but I'm not having any luck with that information either. Suggestions appreciated....John 
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