Nut upsuser - Sep 2005 - Driver for Tripp Lite SmartPro SLT

I have a new SMART1050SLT Tripp Lite UPS that both tripplite
and tripplitesu drivers hate.  Both simply time out with a "can't
find" message.

Does anyone know about the SmartPro series?

On 9/15/05, Kenneth Tindle <ktindle@uky.edu>
wrote:
> I have a new SMART1050SLT Tripp Lite UPS that both tripplite
> and tripplitesu drivers hate.  Both simply time out with a "can't
> find" message.
> 
> Does anyone know about the SmartPro series?
does this one have a USB port?

I tested a SmartPro using the commands that the USB OMNIVS models use,
and it seems like every model supports a different incompatible set of
commands.

-- 
- Charles Lepple

I haven't found it documented anywhere but did discover that it is simple.
The checksum is an unsigned char. You initialize the accumulator to 57 and
then subtract each byte of the command string from the accumulator. I
started working on a tripplite3003 driver (3003 is the Tripp Lite protocol)
but never got around to finishing. Here the code to calculate and send the
checksum byte that I added to the send_cmd function:

	unsigned char checksum = 57;
	for (i = 0; str[i]; i++) checksum -= (unsigned char)str[i];
	ser_send_char(upsfd, checksum);

Paul C. Diem
PCDiem@FoxValley.net

-----Original Message-----
From: Kenneth Tindle [mailto:ktindle@uky.edu]
Sent: Wednesday, September 14, 2005 11:50 PM
To: Paul C. Diem
Subject: Re: [Nut-upsuser] Driver for Tripp Lite SmartPro SLT


Paul,

Do you have any idea what algorithm is used to compute the checksum?  Or
is this a typical Tripp Lite top secret?


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