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<font size="+1"> I do suspect a voltage drop in the line causing
the little lightning bolts. I use Chinese USB volt/amp meters
when I charge stuff. I hate to rely on the dummy lights most
devices have.<br>
I get a nice 5 volts + on those meters and IIRC .4 or so amps.
The device boot, but it does worry me seeing the warnings. You
can see the current go up when you plug in devices, but never by
much. I guess I could try the cables with one of those meters at
both ends and a real short leash to the Pi, see if the voltage
goes down. If I can untangle all the cables I will give it a
try. I'll probably order some Anker cables anyway. For bench
power I ordered a bunch of USB sockets on breakout boards. I
think I paid like $1.60 for 5 of them. I will use old PC power
supplies for the 5 volts and of course get 12 volts as a bonus.<br>
<br>
I spent a good while today (Saturday, gloomy out) going
through each pi one by one. When starting out I kind of winged it
with host names and it didn't take long to lose track. I've
rationalized the names and created a text file to keep track. I
got the mac addresses for each machine under its host name. Also
I got the assigned DHCP IP address in the file. I pulled both
addresses off of the Xfinity Wifi router. I wonder when the
router will refresh the host names to show the changes? Also I
had no luck getting reserved IP addresses on the Xfinity router.
I think I will use an old Linksys router for my RPi world. I
could have total control and if I wanted to demo or deploy my Pi
village I could just plug the router in to the cloud at the new
location. <br>
<br>
I just loaded nmap on one of my linux boxes, sudo apt-get
install nmap (like "</font><font size="+1"><span class="st"><em>Klaatu</em>
barada nikto", but different...)<br>
I think I will have to read the manual. It looks very powerful.
<br>
<br>
<br>
</span></font><font size="+1"><font face="Comic Sans MS">Rob
Seastrom wrote on 1/18/2019 5:16 PM:
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I’ve had no difficulty width 3b+es and phone power supplies
with a 2a nameplate rating. It is highly likely that
freebie grade micro usb cables (and ohms law and 28-30 awg
wire) are to blame. Consider trying Anker or other higher
quality cables that are rated for fast charging of phones.
<div><br>
</div>
<div>Speaking of which if you have a herd of tiny ARM
devices that want 2 amps, I’ve found that the 6 port 60w
Anker power supplies are most excellent for the workbench
or rack. They also make nice presents/stocking stuffers.
<span style="background-color: rgba(255, 255, 255, 0);"><a
href="https://www.amazon.com/dp/B00P936188">https://www.amazon.com/dp/B00P936188</a></span></div>
<div><br>
</div>
<div>And yes, they now have versions that do usb-c if your
newest phone needs that. Anker makes good quality
products at the right price. Two thumbs up.</div>
<div><br>
</div>
<div>Also, yes, dhcp leases are sticky by MAC address. They
tend to not be durable across router reboots though unless
you have an environment where you can make the lease
permanent. If you have a Linux box you can use nmap to
scan your subnet and find your stuff (and if you run it as
root it will tell you about the OUI in the MAC address
which can be handy,</div>
<div><br>
</div>
<div>Lastly, since you have a herd of these beasties, on
Raspbian at least you can set them up to run sshd out of
the box, which eliminates the need to set up a console for
one that is freshly installed. Wouldn’t surprise me if
other distros follow this. <a
href="https://hackernoon.com/raspberry-pi-headless-install-462ccabd75d0">https://hackernoon.com/raspberry-pi-headless-install-462ccabd75d0</a></div>
<div><br>
</div>
<div>-r</div>
<div><br>
</div>
<div><br>
<div id="AppleMailSignature" dir="ltr">Sent from my iPad</div>
<div dir="ltr"><br>
On Jan 12, 2019, at 18:57, Alex Fraser <<a
href="mailto:beatnic@comcast.net">beatnic@comcast.net</a>>
wrote:<br>
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