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<font face="Arial">Currently have the RM3100 reporting nicely on 400
feet of Cat5Eshielded outdoor/direct burial cable; Cat5 is worst
case; Cat6 will be better. <br>
<br>
Still running 3.3 volts into the local end of the cable as in
original testing with 120 foot run no voltage regulation on the
remote.<br>
Still using Dave's original test board with the temp sensor.<br>
With a 220uF cap across incoming power on the remote end, I see
about 250mV drop during data transfer. <br>
100KHz i2c bus SLC and SDA waveforms clean.<br>
Will take additional data over the next couple of days and post.
Then will move to 5 volt feed on the local end with 3.3V LDO reg
on the remote for comparison.<br>
Cable delay <500ns.<br>
Clearly haven't hit the distance limit yet.<br>
Jules - K2KGJ<br>
<br>
</font><br>
<div class="moz-cite-prefix">On 5/20/2020 12:53 PM, David Witten
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CABJ3BVOwyWxDTrkdGZCrXfVhEXZyPxksqrFQ4uk7n=YJomDmsw@mail.gmail.com">
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<div dir="ltr">All 'magnetometerists':
<div><br>
</div>
<div>I am actively updating the software on Github ( <a
href="https://github.com/wittend/rm3100-runMag"
moz-do-not-send="true">https://github.com/wittend/rm3100-runMag</a> ).
I appreciate all of the input I am getting. Both Julius Madey
and Dave Larsen have been especially helpful. Check for
updates often (if you have cloned the repository, just use git
pull from your projects base folder).</div>
<div><br>
</div>
<div>The time is coming where I am going to have to ask folks to
submit bug fix / feature requests using the 'Issues Tracking'
feature on the repository ( <a
href="https://github.com/wittend/rm3100-runMag/issues"
moz-do-not-send="true">https://github.com/wittend/rm3100-runMag/issues</a> )
so that I can avoid losing them in my email and prioritise
them rationally.</div>
<div><br>
</div>
<div>My latest commit updates the presentation of the output
somewhat. Important changes include more understandable
messages regarding missing sensors, presenting some of the
values with more decimal places, and more useful presentation
of values entered on the command line using the -P option. </div>
<div><br>
</div>
<div>Other work continues on several fronts. Most important (to
me) at the moment is synchronizing the Cycle Count (CC) values
with the Gain used for computing output. Also important is
constraining the CC input to values that the sensor will
accept. Some other value inputs need to be sanity checked.</div>
<div><br>
</div>
<div>Please test this and give me your input and frustrations.
Now is a good time for me to work on this.</div>
<div><br>
</div>
<div>Dave Witten, KD0EAG</div>
<div><br>
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