<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<p>Hello!</p>
<p>I left this line uncommented in powercom-hid.c for battery
voltage:<br>
{ "battery.voltage", 0, 0, "UPS.Battery.Voltage", NULL, "%.2f", 0,
NULL },<br>
and got some data different from the input voltage values</p>
<p>The Powercom support staff gave the following response to my
question:<br>
</p>
<pre class="moz-quote-pre" wrap="">Dear Alex,
First of all , thank you for purchasing PCM MRT-3000 ups.
Regarding of your question, see our reply in below
==> Please take your data with below rules :
• DEX : 5378
• HEX : 1502 (Low : 15 / High : 02)
• Battery one cell voltage : [High + (Low/100)] : 2.21
• Battery voltage : 2.21 * 6 * 6 = 79.56 Vol (1 package with 6 cells / MRT has 6 packages)
Best regards
Sandy Chang, Powercom Taiwan HQ
-----Original Message-----
From: Alex Rydzewski [<a class="moz-txt-link-freetext" href="mailto:arydzewski@elyland.net">mailto:arydzewski@elyland.net</a>]
Sent: Thursday, January 12, 2023 5:47 PM
To: <a class="moz-txt-link-abbreviated moz-txt-link-freetext" href="mailto:pcm.eu@upspowercom.com">pcm.eu@upspowercom.com</a>
Subject: MRT-3000 USB battery.voltage
Hello!
I have the MRT-3000 UPS and try to get real battery voltage through USB.
USB protocol reference has specify for battery.voltage:
report id | Usage | Usage Name | Data Access | Length
26 0X8430 Battery Voltage R/O 3 Byte
But I get for this position the next data:
0.544555 [D4] Entering libusb_get_report
0.549533 [D3] Report[get]: (3 bytes) => 1a 02 15
0.549550 [D5] PhyMax = 0, PhyMin = 0, LogMax = 9216, LogMin = 2304
0.549561 [D5] Unit = 00000000, UnitExp = 0
0.549569 [D5] Exponent = 0
0.549576 [D5] hid_lookup_path: 00840004 -> UPS
0.549583 [D5] hid_lookup_path: 00840012 -> Battery
0.549591 [D5] hid_lookup_path: 00840030 -> Voltage
0.549603 [D1] Path: UPS.Battery.Voltage, Type: Feature,
ReportID: 0x1a, Offset: 0, Size: 16, Value: 5378
Suggest me, please, how I can interpret the battery.voltage value "5378? How I can get real battery.voltage data?</pre>
<p>Perhaps it is possible implement this algorithm to "nut" project
for a UPS like this?<br>
</p>
<div class="moz-cite-prefix">On 10.01.23 19:14, Jim Klimov wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAJYg8v+ELkYEvPBYooeWWK=bkuw7z_biOs7bpCjQ_-LJMxLwSA@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="auto">I suppose that should have read "correct
battery.voltage" ;)
<div dir="auto"><br>
</div>
<div dir="auto">Not sure really - this is the standard endpoint
for that info, so firmware is broken for USB HID power device
support.</div>
<div dir="auto"><br>
</div>
<div dir="auto">If you start the driver with higher debug
verbosity, it prints the reports from USB. If you can decipher
those (online tools exist but I don't have a link handy),
maybe some other field (possibly with an untranslated hex
name) conveys data that looks like what you need.</div>
<div dir="auto"><br>
</div>
<div dir="auto">Jim</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue, Jan 10, 2023, 18:09
Alex Rydzewski <<a href="mailto:arydzewski@elyland.net"
moz-do-not-send="true" class="moz-txt-link-freetext">arydzewski@elyland.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<p>Thank You for your attention, Jim!<br>
I compiled and ran the 2.8.0 version with this part
uncomment<br>
* { "battery.voltage", 0, 0,
"UPS.PowerSummary.Voltage", NULL, "%.2f", 0, NULL },<br>
* { "battery.voltage", 0, 0, "UPS.Battery.Voltage",
NULL, "%.2f", 0, NULL },<br>
* { "battery.voltage.nominal", 0, 0,
"UPS.PowerSummary.ConfigVoltage", NULL, "%.0f",
HU_FLAG_STATIC, NULL },<br>
* { "battery.voltage.nominal", 0, 0,
"UPS.Battery.ConfigVoltage", NULL, "%.0f", HU_FLAG_STATIC,
NULL },<br>
from powercom-hid.c, and it is so, it is duplicates for
output.voltage.<br>
<br>
Is there anything I can do to find the correct
output.voltage?<br>
</p>
<div>On 10.01.23 14:12, Jim Klimov wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>Hello,</div>
<div><br>
</div>
<div> One thing that pops out in your report is that
NUT 2.7.2 is used, which is pretty old now. If you
have a chance to install 2.8.0 or newer (custom build
of current git master) to confirm if the problem is
still there, it could be helpful.</div>
<div><br>
</div>
<div> Other than that, current source says at <a
href="https://github.com/networkupstools/nut/blob/1deab1638322e9e64a0cf3200dadc93dbe3a3f41/drivers/powercom-hid.c#L362-L368"
target="_blank" rel="noreferrer"
moz-do-not-send="true" class="moz-txt-link-freetext">https://github.com/networkupstools/nut/blob/1deab1638322e9e64a0cf3200dadc93dbe3a3f41/drivers/powercom-hid.c#L362-L368</a>
that "battery.voltage" is served in USB reports, but
is not useful (same as output voltage). Nearby,
"battery.runtime" and "battery.mfr.date" do come from
USB reports, but per <a
href="https://github.com/networkupstools/nut/issues/1644"
target="_blank" rel="noreferrer"
moz-do-not-send="true" class="moz-txt-link-freetext">https://github.com/networkupstools/nut/issues/1644</a>
the latter was previously wrongly reported as
"battery.date" (for replacement). Note that generally
fixes are based on user reports about devices which
misbehaved; if a vendor has multiple devices with
different behaviors (including bug fixes in newer
firmwares) it can get messy and need some more
elaborate fixes :-\<br>
</div>
<div><br>
</div>
<div> Something in your question does ring a bell -
please revise <a
href="https://github.com/networkupstools/nut/issues?q=+label%3APowercom"
target="_blank" rel="noreferrer"
moz-do-not-send="true">https://github.com/networkupstools/nut/issues?q=label%3APowercom</a>
and/or <a
href="https://github.com/networkupstools/nut/issues?q=powercom"
target="_blank" rel="noreferrer"
moz-do-not-send="true" class="moz-txt-link-freetext">https://github.com/networkupstools/nut/issues?q=powercom</a>
to see if that was discussed earlier in more detail.<br>
</div>
<div><br>
</div>
<div>Hope this helps,</div>
<div>Jim Klimov<br>
</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue, Jan 10, 2023
at 11:42 AM Alex Rydzewski <<a
href="mailto:arydzewski@elyland.net" target="_blank"
rel="noreferrer" moz-do-not-send="true"
class="moz-txt-link-freetext">arydzewski@elyland.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px
0px 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">Hello!<br>
<br>
I have not been able to get the battery.voltage data
from the Powercom <br>
Macan MRT-3000, although there is data in the log that
does not match <br>
the value I see on the device's display. Please tell
me how I can <br>
control this. And please tell me, if possible, how to
get the absolute <br>
value of the load on this device.<br>
Debug log is attached<br>
<br>
~ # upsc 004-0D9F-000<br>
Init SSL without certificate database<br>
battery.charge: 100<br>
battery.charge.low: 10<br>
battery.charge.warning: 30<br>
battery.date: 2014/01/15 I'm not sure that
it is right<br>
battery.runtime: 800 Is this data
from the device or <br>
from the driver?<br>
battery.type: PbAc<br>
battery.voltage.high: 81.60<br>
battery.voltage.low: 63.60<br>
battery.voltage.nominal: 75.60<br>
device.mfr: POWERCOM Co.,LTD<br>
device.model: HID UPS Battery<br>
device.serial: 004-0D9F-000<br>
device.type: ups<br>
<a href="http://driver.name" rel="noreferrer
noreferrer" target="_blank" moz-do-not-send="true">driver.name</a>:
usbhid-ups<br>
driver.version: 2.7.2<br>
driver.version.data: PowerCOM HID 0.4<br>
driver.version.internal: 0.38<br>
...<br>
<br>
-- <br>
З найкращими побажаннями, Олександр Ридзевський |With
best regards, Mr. Alexander Rydzewski, |С
наилучшими пожеланиями, Александр Рыдзевский<br>
Системний та мережевий інженер, Elyland ltd.
|System and Network Engineer at Elyland ltd.
|Системный и сетевой инженер, Elyland ltd.<br>
</blockquote>
</div>
</blockquote>
<pre cols="72">--
З найкращими побажаннями, Олександр Ридзевський |With best regards, Mr. Alexander Rydzewski, |С наилучшими пожеланиями, Александр Рыдзевский
Системний та мережевий інженер, Elyland ltd. |System and Network Engineer at Elyland ltd. |Системный и сетевой инженер, Elyland ltd.</pre>
</div>
</blockquote>
</div>
</blockquote>
<pre class="moz-signature" cols="72">--
З найкращими побажаннями, Олександр Ридзевський |With best regards, Mr. Alexander Rydzewski, |С наилучшими пожеланиями, Александр Рыдзевский
Системний та мережевий інженер, Elyland ltd. |System and Network Engineer at Elyland ltd. |Системный и сетевой инженер, Elyland ltd.</pre>
</body>
</html>