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docs: Documentation/FAQ, Raspii voltage 

Add note that `under power` may be related to communication issues.

Signed-off-by: Wilfried Goesgens <dothebart@citadel.org>
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-01-05 20:59:12 -05:00
parent df42887193
commit 186d815469
1 changed files with 7 additions and 3 deletions
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10
docs/FAQ.md
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@ -240,9 +240,13 @@ This is commonly caused by hardware errors on the USB connection
between the host machine and the micro-controller. Things to look for:
- Use a good quality USB cable between the host machine and
micro-controller. Make sure the plugs are secure.
- If using a Raspberry Pi, use a good quality power supply for the
Raspberry Pi and use a good quality USB cable to connect that power
supply to the Pi.
- If using a Raspberry Pi, use a
[good quality power supply](https://www.raspberrypi.org/documentation/hardware/raspberrypi/power/README.md)
for the Raspberry Pi and use a
[good quality USB cable](https://www.raspberrypi.org/forums/viewtopic.php?p=589877#p589877)
to connect that power supply to the Pi. If you get "under voltage"
warnings from OctoPrint, this is related to the power supply and it
must be fixed.
- Make sure the printer's power supply is not being overloaded. (Power
fluctuations to the micro-controller's USB chip may result in resets
of that chip.)