I'm having trouble with a TrippLite SU3000XLCD. I'm using a Raspberry Pi
running Raspbian (wheezy) with NUT 2.6.4.
I can monitor my older TrippLite UPSs, mostly SU1000RT2Us, with this Pi and a
USB to serial adapter.
My first thought with the SU3000XLCD was to use the USB port instead of the
serial port as that's the "modern" thing to do. When I plugged the USB cable
in to the UPS it turned off, dropping the load. The load is process control
instrumentation which, while not damaged, presented some challenges to restart.
So now I'm leery of using the USB port.
With a long history of success monitoring UPSs via serial communication that's
where I am now. Unfortunately NUT doesn't see the UPS.
My query is two part:
1) Is there a reasonable explanation for why plugging my Pi into the UPSs
USB port caused it to turn off? Is there a proper way to connect it that will
avoid this? If so my problem is likely solved if the usbhid-ups driver will
talk to my SU3000XLCD. If I can't assure my employers that I won't kill the
process again USB may not be a viable option.
2) Connecting to the serial port has not (yet) shut down the UPS. This is
a good start but it would be better if communication happened. Should I be
able to communicate via serial port with this SU3000XLCD with one of these
drivers? Is there another driver that's known to work with this UPS or can
this one be "tweaked" to work? Can it be as simple as a baud rate mismatch?
I'm not having much luck querying the serial port's settings.
In ups.conf I have:
[UPS-0040]
driver = tripplitesu
# driver = tripplite
port = /dev/ttyACM0
desc = "TrippLite SU3000XLCD"
using tripplitesu:
upsdrvctl start
Network UPS Tools - UPS driver controller 2.6.4
Network UPS Tools - Tripp Lite SmartOnline driver 0.03 (2.6.4)
Warning: This is an experimental driver.
Some features may not function correctly.
Unable to detect Tripp Lite SmartOnline UPS on port /dev/ttyACM0
Driver failed to start (exit status=1)
------------
/lib/nut/tripplitesu -DD -a UPS-0040
Network UPS Tools - Tripp Lite SmartOnline driver 0.03 (2.6.4)
Warning: This is an experimental driver.
Some features may not function correctly.
0.000000 debug level is '2'
0.424498 Unable to detect Tripp Lite SmartOnline UPS on port /dev/ttyACM0
Similarly using tripplite:
upsdrvctl start
Network UPS Tools - UPS driver controller 2.6.4
Network UPS Tools - Tripp-Lite SmartUPS driver 0.91 (2.6.4)
Failed to find UPS - giving up...
Driver failed to start (exit status=1)
------------
/lib/nut/tripplite -DD -a UPS-0040
Network UPS Tools - Tripp-Lite SmartUPS driver 0.91 (2.6.4)
0.000000 debug level is '2'
3.012128
Failed to find UPS - giving up...
Thanks in advance for any help.
Charles
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