[arm-allstar] GPIO control of fan

[Jay Freeman]

OK, I got a cable made this week and the repeater is now being controlled by the Pi. I hooked up GPIO 4 on the URI to be my ctcss enable logic line. 

I played around with the event management and finally succeeded in getting gpio4 to turn on and off with RPT_RXKEYED. An interesting exercise but it didn’t really accomplish what I was after, since of course I can’t hear the node respond to commands with that enabled :😊

Is there possibly another variable I can check to cause ctcss to drop out sometime during the repeater hangtime?

Thanks,

Jay – WT9S

Sent from Mail for Windows 10



From: Doug Crompton
Sent: Thursday, October 29, 2015 1:31 PM
To: ARM Allstar
Subject: Re: [arm-allstar] GPIO control of fan


Jay,

 In many cases you can just leave the fan run at reduced speed all the time but if you want to control it simply why not just use the PTT line to turn it on. That would be very easy. The PTT (in most cases) goes to ground when active and it would be high not active. The only thing you have to be careful of if you connect the fan directly to the PTT line is the fan voltage should not be more than the open high state of the radios PTT. You could also build a simple keying circuit to start the fan when the PTT went low and eliminate that problem. Most people get way to carried away with fan circuits but if you want to get fancy here is an example -  

http://latinovoip.net/allstar-and-the-gpio-fan-script-for-dmk-engineering-uri/

73 Doug
WA3DSP
http://www.crompton.com/hamradio


To: arm-allstar at hamvoip.org
From: wt9s at me.com
Date: Thu, 29 Oct 2015 10:18:55 -0700
Subject: [arm-allstar] GPIO control of fan
Hi folks,
 
I’ve been running my repeater here with an Arcom RC210 controller for years. I have the repeater, an IRLP computer, and the Allstar node (now on a Pi) each connected to a port on the controller. The controller currently switches on a fan for 60 seconds whenever PTT goes active. I am thinking of ditching the IRLP and the Arcom and running my repeater with the Allstar node as the controller. I’m looking for some pointers on how to control the fan with either the URI GPIO, or the USB GPIO described in the How-Tos. I guess using the URI would be simpler.
 
Thanks,
 
Jay – WT9S
 
Sent from Mail for Windows 10

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