The names for digital channels makes sense to me already..... Door1, Pump, etc. But there are also 8 labels, but just 8. There aren't separate labels for the bit states.<div><br></div><div>So, if I already have the names, what do the labeles, sent in a different message, accomplish?</div>
<div><br></div><div>Chuck<br><br><div class="gmail_quote">On Thu, Oct 18, 2012 at 3:48 PM, Steve Noskowicz <span dir="ltr"><<a href="mailto:noskosteve@yahoo.com" target="_blank">noskosteve@yahoo.com</a>></span> wrote:<br>
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<div>Thinking more...</div>
<div> </div>
<div>Say you have four door switches on your trailer and four window switches. The labels could be this for your trailer telemetry:</div>
<div> <font face="CourierNew"><font face="CourierNew"></font></font></div>
<div>UNIT<font face="CourierNew"><font face="CourierNew">,...bla,bla,bla...Door1,Door2,Door3,Door4,Win1,Win2,Win3,Win4</font></font></div>
<div><font face="CourierNew"><font face="CourierNew"></font></font> </div>
<div><font face="CourierNew"><font face="CourierNew">Since you can put anything you want it could also be:</font></font></div>
<div> </div>
<div><font face="CourierNew"><font face="CourierNew">UNIT<font face="CourierNew"><font face="CourierNew">,...bla,bla,bla...Open1,Open2,Open3,Open4,Front,Rear,Back,Roof</font></font></font></font></div>
<div><font face="CourierNew"><font face="CourierNew"></font></font> </div>
<div><font face="CourierNew"><font face="CourierNew">If you don't want anyone to know which is which, I suppose you could have :</font></font></div>
<div><font face="CourierNew"><font face="CourierNew"></font></font> </div>
<div>UNIT<font face="CourierNew"><font face="CourierNew">,...bla,bla,bla...Open,Open,Open,Open,Open,Open,Open,Open</font></font></div>
<div><font face="CourierNew"><font face="CourierNew"> </font></font></div>
<div><br>73, Steve, <br></div>
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<div>I just looked into this.</div>
<div> </div>
<div>Units should be obvious for the analog quantities. This specifies the units of measure - the units of these quantities. Things like volts, Degrees F, Degrees C, or Degrees K -- seconds, or minutes, or days. If it was money, it could be dollars, pounds, or Yen. These can also be scaled by making the units volts/100 for large values or volts*100, or perhaps mv (milivolts) for small values.</div>
<div> </div>
<div>Now we get to "What's in a name..." for the digital bits.</div>
<div> Call it a name or a lable, but it must tell what the digital bit represents in your situation. </div>
<div>The digital labels will indicate the function of each bit. What is it representing. These will be only 1 or zero but the labels tell you what they indicate. They are for things like a door open or closed; a switch open or closed; a shutter button pushed down or notl; a motor running or not. </div>
<div> </div>
<div>Does that help?</div>
<div> <br><br>73, Steve, K9DCI USN (Vet) MOT (Ret) Ham (Yet)<br><br>--- On <b>Thu, 10/18/12, Charles Bland <i><<a href="mailto:root@blandranch.net" target="_blank">root@blandranch.net</a>></i></b> wrote:<br>Chapter 13 of the APRS spec goes into the detail of the parameter names.</div>
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<div><br></div>
<div>The PARM. message contains the analog and digital channels.</div>
<div><br></div>
<div>The UNIT. message contains units for the analog channels and "labels" for the digital channels. This isn't clear to me.</div>
<div><br></div>
<div>Regarding the digital channels, what is the difference between a "name" and a "label"? I see the message examples in the spec, but I really don't see an application for the labels.</div>
<div><br></div>
<div>Can anyone provide for clarity on this?</div>
<div><br></div>
<div>Chuck Bland</div>
<div>na6br</div>
<div><br></div>
<div><br></div></div>
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