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Re: APC UPS connection

To: REALbasic Network Users Group <realbasic-nug at lists dot realsoftware dot com>
Subject: Re: APC UPS connection
From: chris <cb at mythtech dot net>
Date: Sun, 30 Mar 2003 19:35:59 -0500
>> Has anyone written a class or plugin that can connect to an APC UPS and
>> pick up the power info data it transmits?
>
>Did you ask the developer of the machines?
>
>You certainly need a driver for this.

APC no longer appears to offer the Mac version of their software for 
prior to OS 9. They also don't appear to offer a software SDK, but there 
are some open source Linux tools that pick up the data from their UPSes. 
So before I attempted to understand the protocol from looking at the 
Linux code, I was hoping someone already did the work for RB.

I don't think a driver is needed. 

>From what I understand, the communication is pretty much one way. The UPS 
sends data over a cable plugged into the serial port. You either read the 
data and understand what it is, or you ignore it. You never send anything 
back to the UPS. All that happens is you read the data sent, and then act 
however you want based on the data. (the data is things like line voltage 
levels, battery power levels, and possibly remaining battery time, but I 
suspect that is actually calculated at the client based on battery level 
and rate of discharge)

-chris
<http://www.mythtech.net>


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