Bob Healey healer at
Thu Nov 5 17:22:50 UTC 2015

apcupsd also supports SNMP, and the usage of the network monitoring 
cards.  I find that works better for my usage, because a given host on 
my Smart-UPS 5000 might be down at any given moment for testing, and if 
its the one with the single usb connection, I'm out of luck. Instead, I 
have apcupsd on each host talking to the UPS's onboard NIC and running 
independently, with the ability to power off the UPS disabled (by using 
the read-only SNMP community).

Bob Healey
Systems Administrator
Biocomputation and Bioinformatics Constellation
and Molecularium
healer at
(518) 276-4407

On 11/5/2015 12:02 PM, Warren Block wrote:
> On Thu, 5 Nov 2015, krad wrote:
>> from what i remember the usb just presents itself as serial over usb, so
>> that makes sense. THe network bit is a bit misleading as I think it 
>> means
>> it talks to another apcupsd on a different host connected to a ups via
>> serial, rather than direct to a network enabled UPS.
> I have one APC Smart-UPS 1500 connected to a server by USB.  The USB 
> port is native USB, it does not appear on the computer as a 
> USB-connected serial port.  Other APC UPSes have DB9 ports that can 
> speak serial or USB depending on the oddball adapter cables. Some 
> older UPSes might be serial only.
> apcaccess shows this on the server:
>   CABLE    : USB Cable
>   DRIVER   : USB UPS Driver
> Another computer is plugged into the Smart-UPS 1500 for power, but of 
> course cannot share the UPS connector.  apcupsd on that computer 
> connects over the network to the main apcupsd on the server that is 
> directly connected to the Smart-UPS USB port.  It works transparently. 
> apcaccess on the client computer shows:
>   CABLE    : Ethernet Link
> For my use, apcupsd is superior to the network monitoring cards that 
> can be installed in the higher-end APC units.
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