<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>they weren't designed as full interfaces with all the signals that a DMK or their own RB URI brought out, hence the price (and thinking board form factor) and feature set. Looks like they were designed to interface between a radio by direct plug in on the header on the back of the CDM and a computer running app-rpt and not much else. </div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">I'm thinking anything extraneous to that mission was left out, since there are multiple options (DMK,RB, DIY) that already accomplish the same thing.<br><br>Kyle K0KN in Olathe KS wrote a set of scripts that do fan control based on the event subsystem setting a flag after x seconds on transmit, setting a GPIO pin, running them for y seconds after the repeater goes idle. DMK published a simple schematic for a relay circuit that buffers the GPIO; 1 resistor, 1 diode, 1 transistor, and a pcb relay. Been using his scripts and that circuit since '11, with zero issues to control the fans on my machines here.<br>--<div>Bryan</div><div>Sent from my iPhone 6S.<span style="font-size: 13pt;">..No electrons were harmed in the sending of this message.</span></div><div><br><div><br></div></div></div><div><br>On Jun 21, 2016, at 07:24, Stephen - K1LNX <<a href="mailto:k1lnx@k1lnx.net">k1lnx@k1lnx.net</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">Hi guys, <div> I'm running a pair of UHF CDM1550's in full duplex with one of the new Repeater Builder Rim "lite" RM interfaces: </div><div><br></div><div><a href="http://www.repeater-builder.com/products/usb-rim-lite.html">http://www.repeater-builder.com/products/usb-rim-lite.html</a><br></div><div><br></div><div>It does not look like I can tap the GPIO's very easily on these boards, nor can I tell if GPIO 5-8 is available for general use looking at the schematic: </div><div><br></div><div><a href="http://www.repeater-builder.com/products/pdfs/RB_RIM_Max.pdf">http://www.repeater-builder.com/products/pdfs/RB_RIM_Max.pdf</a><br></div><div><br></div><div>What I'd like to do is drive a relay board to switch a fan on if the receiver is active or there is traffic coming in to the node, being connected to another station or hub for example. I read over the GPIO and event management subsystem documentation, and it looks like that's what I need, but I don't have a parallel port nor can I tap the GPIO's on my interface easily (or even know if they can be used as per the above). </div><div><br></div><div>Looking for ideas here if anyone else has encountered this, would prefer the logic/relay board approach vs. say a temperature controlled switch on the heatsink or something. </div><div><br></div><div>73</div><div>Stephen</div><div>K1LNX</div><div><br></div><div><br></div><div><br></div></div>
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