[Apcupsd-users] apcaccess readings not up-to-date

Discussion:

Sandro Bordacchini

2017-06-23 09:31:24 UTC

Hello everyone.

I have a problem on my small server room, i hope someone here can help me
to figure out what's my problem.

I have a server rack powered by two SMT1500RMI2U, both upgraded to FW 09.3.
I purchased a bananapi platform and installed a debian stretch (armv7l
arch) to use the packaged apcupsd v.3.14.14 (31 May 2016).
After enabling modbus protocol on the UPSes, I connected them to the
bananapi platform with two usb cables.
I work out a systemd configuration to have two distinct apcupsd instances
(with different nisport) running.
Then integrated that on a zabbix agent (i can give you more details on it)
but basically i got apcaccess running once every minute for each apcupsd
instance.

All was working smoothly, but I soon realized that the readings were good
only for a short period (variable from tens of minutes to some hours), then
they get constant.
I need to restart apcupsd to have again actual readings.

I thought this was due the two instances of apcupsd running on the same
machine, so i removed one, disconnected one apcupsd, rebooted the device.
But the problem is still there. Maybe, but that could be only a
coincidence, the period was longer than before.

This https://ibb.co/bxy2DQ is the zabbix graph, you can see that readings
become constant just before 18:50.

And this is the apcaccess output:

***@banana:~# date && apcaccess -h localhost:3551
Fri Jun 23 10:33:49 CEST 2017
APC : 001,039,0910
DATE : 2017-06-22 18:48:54 +0200
HOSTNAME : banana
VERSION : 3.14.14 (31 May 2016) debian
UPSNAME : APCUPS
CABLE : USB Cable
DRIVER : MODBUS UPS Driver
UPSMODE : Stand Alone
STARTTIME: 2017-06-22 14:06:35 +0200
MODEL : Smart-UPS 1500
STATUS : BOOST ONLINE
LINEV : 205.9 Volts
LOADPCT : 26.0 Percent
LOADAPNT : 23.4 Percent
BCHARGE : 100.0 Percent
TIMELEFT : 51.0 Minutes
MBATTCHG : -1 Percent
MINTIMEL : -1 Minutes
MAXTIME : 0 Seconds
OUTPUTV : 237.6 Volts
DWAKE : 0 Seconds
DSHUTD : 0 Seconds
ITEMP : 27.4 C
BATTV : 27.1 Volts
LINEFREQ : 50.0 Hz
OUTCURNT : 1.50 Amps
NUMXFERS : 0
TONBATT : 0 Seconds
CUMONBATT: 0 Seconds
XOFFBATT : N/A
SELFTEST : OK
STATFLAG : 0x0500000C
MANDATE : 2013-01-10
SERIALNO : AS1302223920
BATTDATE : 2016-12-15
NOMOUTV : 230 Volts
NOMPOWER : 1000 Watts
NOMAPNT : 1500 VA
FIRMWARE : UPS 09.3 / 00.4
END APC : 2017-06-23 10:33:49 +0200

You can see the DATE field is exactly the time where i stopped to have good
readings.
Here https://pastebin.com/Xf6bLiZF you can read the apcupsd configuration
file.

Can anyone help me with this?

Thanks a lot.
Sandro.

Trevor Roydhouse

2017-06-23 21:15:37 UTC

Permalink

Post by Sandro Bordacchini
I purchased a bananapi platform and installed a debian stretch (armv7l
arch) to use the packaged apcupsd v.3.14.14 (31 May 2016).
After enabling modbus protocol on the UPSes, I connected them to the
bananapi platform with two usb cables.

A quick Google suggests that the BananaPI has significant USB issues
dating from 2014 through 2017. As noone else has reported this issue,
I'd suggest it's a BananaPI issue.

Ted Mittelstaedt

2017-06-25 06:40:02 UTC

Permalink

Your USB cables are probably poor quality. These devices have problems
with poor quality USB cables.

You also need to re-think this USB business. The bannana pi has 2
serial ports (according to the docs, I

haven't used one myself) and you should use those to connect to the
UPSes instead of USB.

Ted

Post by Sandro Bordacchini
Hello everyone.
I have a problem on my small server room, i hope someone here can help
me to figure out what's my problem.
I have a server rack powered by two SMT1500RMI2U, both upgraded to FW 09.3.
I purchased a bananapi platform and installed a debian stretch (armv7l
arch) to use the packaged apcupsd v.3.14.14 (31 May 2016).
After enabling modbus protocol on the UPSes, I connected them to the
bananapi platform with two usb cables.
I work out a systemd configuration to have two distinct apcupsd
instances (with different nisport) running.
Then integrated that on a zabbix agent (i can give you more details on
it) but basically i got apcaccess running once every minute for each
apcupsd instance.
All was working smoothly, but I soon realized that the readings were
good only for a short period (variable from tens of minutes to some
hours), then they get constant.
I need to restart apcupsd to have again actual readings.
I thought this was due the two instances of apcupsd running on the
same machine, so i removed one, disconnected one apcupsd, rebooted the
device.
But the problem is still there. Maybe, but that could be only a
coincidence, the period was longer than before.
This https://ibb.co/bxy2DQ is the zabbix graph, you can see that
readings become constant just before 18:50.
Fri Jun 23 10:33:49 CEST 2017
APC : 001,039,0910
DATE : 2017-06-22 18:48:54 +0200
HOSTNAME : banana
VERSION : 3.14.14 (31 May 2016) debian
UPSNAME : APCUPS
CABLE : USB Cable
DRIVER : MODBUS UPS Driver
UPSMODE : Stand Alone
STARTTIME: 2017-06-22 14:06:35 +0200
MODEL : Smart-UPS 1500
STATUS : BOOST ONLINE
LINEV : 205.9 Volts
LOADPCT : 26.0 Percent
LOADAPNT : 23.4 Percent
BCHARGE : 100.0 Percent
TIMELEFT : 51.0 Minutes
MBATTCHG : -1 Percent
MINTIMEL : -1 Minutes
MAXTIME : 0 Seconds
OUTPUTV : 237.6 Volts
DWAKE : 0 Seconds
DSHUTD : 0 Seconds
ITEMP : 27.4 C
BATTV : 27.1 Volts
LINEFREQ : 50.0 Hz
OUTCURNT : 1.50 Amps
NUMXFERS : 0
TONBATT : 0 Seconds
CUMONBATT: 0 Seconds
XOFFBATT : N/A
SELFTEST : OK
STATFLAG : 0x0500000C
MANDATE : 2013-01-10
SERIALNO : AS1302223920
BATTDATE : 2016-12-15
NOMOUTV : 230 Volts
NOMPOWER : 1000 Watts
NOMAPNT : 1500 VA
FIRMWARE : UPS 09.3 / 00.4
END APC : 2017-06-23 10:33:49 +0200
You can see the DATE field is exactly the time where i stopped to have
good readings.
Here https://pastebin.com/Xf6bLiZF you can read the apcupsd
configuration file.
Can anyone help me with this?
Thanks a lot.
Sandro.
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Sandro Bordacchini

2017-06-29 13:13:53 UTC

Permalink

Thanks Trevor and Ted.

I am using the USB cables supplied with the UPSes.

Anyway, do you suggest me to figure out how to setup two serial ports on
the Banana (that's not a lot of documentation around) or invest some money
to buy a Raspberry and stick with USB cables?

Any other hint would be appreciated.

Thanks.

Send Apcupsd-users mailing list submissions to
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1. Re: apcaccess readings not up-to-date (Ted Mittelstaedt)
----------------------------------------------------------------------
Message: 1
Date: Sat, 24 Jun 2017 23:40:02 -0700
Subject: Re: [Apcupsd-users] apcaccess readings not up-to-date
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Your USB cables are probably poor quality. These devices have problems
with poor quality USB cables.
You also need to re-think this USB business. The bannana pi has 2
serial ports (according to the docs, I
haven't used one myself) and you should use those to connect to the
UPSes instead of USB.
Ted

Post by Sandro Bordacchini
Hello everyone.
I have a problem on my small server room, i hope someone here can help
me to figure out what's my problem.
I have a server rack powered by two SMT1500RMI2U, both upgraded to FW
09.3.
I purchased a bananapi platform and installed a debian stretch (armv7l
arch) to use the packaged apcupsd v.3.14.14 (31 May 2016).
After enabling modbus protocol on the UPSes, I connected them to the
bananapi platform with two usb cables.
I work out a systemd configuration to have two distinct apcupsd
instances (with different nisport) running.
Then integrated that on a zabbix agent (i can give you more details on
it) but basically i got apcaccess running once every minute for each
apcupsd instance.
All was working smoothly, but I soon realized that the readings were
good only for a short period (variable from tens of minutes to some
hours), then they get constant.
I need to restart apcupsd to have again actual readings.
I thought this was due the two instances of apcupsd running on the
same machine, so i removed one, disconnected one apcupsd, rebooted the
device.
But the problem is still there. Maybe, but that could be only a
coincidence, the period was longer than before.
This https://ibb.co/bxy2DQ is the zabbix graph, you can see that
readings become constant just before 18:50.
Fri Jun 23 10:33:49 CEST 2017
APC : 001,039,0910
DATE : 2017-06-22 18:48:54 +0200
HOSTNAME : banana
VERSION : 3.14.14 (31 May 2016) debian
UPSNAME : APCUPS
CABLE : USB Cable
DRIVER : MODBUS UPS Driver
UPSMODE : Stand Alone
STARTTIME: 2017-06-22 14:06:35 +0200
MODEL : Smart-UPS 1500
STATUS : BOOST ONLINE
LINEV : 205.9 Volts
LOADPCT : 26.0 Percent
LOADAPNT : 23.4 Percent
BCHARGE : 100.0 Percent
TIMELEFT : 51.0 Minutes
MBATTCHG : -1 Percent
MINTIMEL : -1 Minutes
MAXTIME : 0 Seconds
OUTPUTV : 237.6 Volts
DWAKE : 0 Seconds
DSHUTD : 0 Seconds
ITEMP : 27.4 C
BATTV : 27.1 Volts
LINEFREQ : 50.0 Hz
OUTCURNT : 1.50 Amps
NUMXFERS : 0
TONBATT : 0 Seconds
CUMONBATT: 0 Seconds
XOFFBATT : N/A
SELFTEST : OK
STATFLAG : 0x0500000C
MANDATE : 2013-01-10
SERIALNO : AS1302223920
BATTDATE : 2016-12-15
NOMOUTV : 230 Volts
NOMPOWER : 1000 Watts
NOMAPNT : 1500 VA
FIRMWARE : UPS 09.3 / 00.4
END APC : 2017-06-23 10:33:49 +0200
You can see the DATE field is exactly the time where i stopped to have
good readings.
Here https://pastebin.com/Xf6bLiZF you can read the apcupsd
configuration file.
Can anyone help me with this?
Thanks a lot.
Sandro.
------------------------------------------------------------

------------------

Post by Sandro Bordacchini
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William Smith

2017-06-29 14:38:13 UTC

Permalink

Raspberry Pi works flawlessly with USB cables, Iâve got several of them talking to APC UPSen

Post by Sandro Bordacchini
Thanks Trevor and Ted.
I am using the USB cables supplied with the UPSes.
Anyway, do you suggest me to figure out how to setup two serial ports on the Banana (that's not a lot of documentation around) or invest some money to buy a Raspberry and stick with USB cables?
Any other hint would be appreciated.
Thanks.
Send Apcupsd-users mailing list submissions to
To subscribe or unsubscribe via the World Wide Web, visit
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or, via email, send a message with subject or body 'help' to
You can reach the person managing the list at
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Apcupsd-users digest..."
1. Re: apcaccess readings not up-to-date (Ted Mittelstaedt)
----------------------------------------------------------------------
Message: 1
Date: Sat, 24 Jun 2017 23:40:02 -0700 <tel:02%20-0700>
Subject: Re: [Apcupsd-users] apcaccess readings not up-to-date
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Your USB cables are probably poor quality. These devices have problems
with poor quality USB cables.
You also need to re-think this USB business. The bannana pi has 2
serial ports (according to the docs, I
haven't used one myself) and you should use those to connect to the
UPSes instead of USB.
Ted

Post by Sandro Bordacchini
Hello everyone.
I have a problem on my small server room, i hope someone here can help
me to figure out what's my problem.
I have a server rack powered by two SMT1500RMI2U, both upgraded to FW
09.3.
I purchased a bananapi platform and installed a debian stretch (armv7l
arch) to use the packaged apcupsd v.3.14.14 (31 May 2016).
After enabling modbus protocol on the UPSes, I connected them to the
bananapi platform with two usb cables.
I work out a systemd configuration to have two distinct apcupsd
instances (with different nisport) running.
Then integrated that on a zabbix agent (i can give you more details on
it) but basically i got apcaccess running once every minute for each
apcupsd instance.
All was working smoothly, but I soon realized that the readings were
good only for a short period (variable from tens of minutes to some
hours), then they get constant.
I need to restart apcupsd to have again actual readings.
I thought this was due the two instances of apcupsd running on the
same machine, so i removed one, disconnected one apcupsd, rebooted the
device.
But the problem is still there. Maybe, but that could be only a
coincidence, the period was longer than before.
This https://ibb.co/bxy2DQ <https://ibb.co/bxy2DQ> is the zabbix graph, you can see that
readings become constant just before 18:50.
Fri Jun 23 10:33:49 CEST 2017
APC : 001,039,0910
DATE : 2017-06-22 18:48:54 +0200
HOSTNAME : banana
VERSION : 3.14.14 (31 May 2016) debian
UPSNAME : APCUPS
CABLE : USB Cable
DRIVER : MODBUS UPS Driver
UPSMODE : Stand Alone
STARTTIME: 2017-06-22 14:06:35 +0200
MODEL : Smart-UPS 1500
STATUS : BOOST ONLINE
LINEV : 205.9 Volts
LOADPCT : 26.0 Percent
LOADAPNT : 23.4 Percent
BCHARGE : 100.0 Percent
TIMELEFT : 51.0 Minutes
MBATTCHG : -1 Percent
MINTIMEL : -1 Minutes
MAXTIME : 0 Seconds
OUTPUTV : 237.6 Volts
DWAKE : 0 Seconds
DSHUTD : 0 Seconds
ITEMP : 27.4 C
BATTV : 27.1 Volts
LINEFREQ : 50.0 Hz
OUTCURNT : 1.50 Amps
NUMXFERS : 0
TONBATT : 0 Seconds
CUMONBATT: 0 Seconds
XOFFBATT : N/A
SELFTEST : OK
STATFLAG : 0x0500000C
MANDATE : 2013-01-10
SERIALNO : AS1302223920
BATTDATE : 2016-12-15
NOMOUTV : 230 Volts
NOMPOWER : 1000 Watts
NOMAPNT : 1500 VA
FIRMWARE : UPS 09.3 / 00.4
END APC : 2017-06-23 10:33:49 +0200
You can see the DATE field is exactly the time where i stopped to have
good readings.
Here https://pastebin.com/Xf6bLiZF <https://pastebin.com/Xf6bLiZF> you can read the apcupsd
configuration file.
Can anyone help me with this?
Thanks a lot.
Sandro.
------------------------------------------------------------------------------
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Ted Mittelstaedt

2017-07-06 08:10:19 UTC

Permalink

From:

http://linux-sunxi.org/LeMaker_Banana_Pi

"...The Raspberry's "original" serial port on GPIO 14 and 15 (CON3, pins
8 and 10 - at MMIO 0x1c28c00) can usually be accessed as /dev/ttyS2 on
the Banana Pi. J12 also provides another serial port on pins 4 (RXD) and
6 (TXD) at MMIO 0x1c29c00, which should map to /dev/ttyS3.."

You haven't said WHY you are wanting to use either a rasbperry or
bananna pi, but in my world, people hand me used PCs for free that run
Linux just fine - so I have never felt the need to invest money on
hardware to run apcupsd...

Ted

Post by Sandro Bordacchini
Thanks Trevor and Ted.
I am using the USB cables supplied with the UPSes.
Anyway, do you suggest me to figure out how to setup two serial ports on
the Banana (that's not a lot of documentation around) or invest some
money to buy a Raspberry and stick with USB cables?
Any other hint would be appreciated.
Thanks.
Send Apcupsd-users mailing list submissions to
To subscribe or unsubscribe via the World Wide Web, visit
https://lists.sourceforge.net/lists/listinfo/apcupsd-users
<https://lists.sourceforge.net/lists/listinfo/apcupsd-users>
or, via email, send a message with subject or body 'help' to
You can reach the person managing the list at
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Apcupsd-users digest..."
1. Re: apcaccess readings not up-to-date (Ted Mittelstaedt)
----------------------------------------------------------------------
Message: 1
Date: Sat, 24 Jun 2017 23:40:02 -0700 <tel:02%20-0700>
Subject: Re: [Apcupsd-users] apcaccess readings not up-to-date
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Your USB cables are probably poor quality. These devices have problems
with poor quality USB cables.
You also need to re-think this USB business. The bannana pi has 2
serial ports (according to the docs, I
haven't used one myself) and you should use those to connect to the
UPSes instead of USB.
Ted

Post by Sandro Bordacchini
Hello everyone.
I have a problem on my small server room, i hope someone here can

help

Post by Sandro Bordacchini
me to figure out what's my problem.
I have a server rack powered by two SMT1500RMI2U, both upgraded to FW
09.3.
I purchased a bananapi platform and installed a debian stretch

(armv7l

Post by Sandro Bordacchini
arch) to use the packaged apcupsd v.3.14.14 (31 May 2016).
After enabling modbus protocol on the UPSes, I connected them to the
bananapi platform with two usb cables.
I work out a systemd configuration to have two distinct apcupsd
instances (with different nisport) running.
Then integrated that on a zabbix agent (i can give you more

details on

Post by Sandro Bordacchini
it) but basically i got apcaccess running once every minute for each
apcupsd instance.
All was working smoothly, but I soon realized that the readings were
good only for a short period (variable from tens of minutes to some
hours), then they get constant.
I need to restart apcupsd to have again actual readings.
I thought this was due the two instances of apcupsd running on the
same machine, so i removed one, disconnected one apcupsd,

rebooted the

Post by Sandro Bordacchini
device.
But the problem is still there. Maybe, but that could be only a
coincidence, the period was longer than before.
This https://ibb.co/bxy2DQ is the zabbix graph, you can see that
readings become constant just before 18:50.
Fri Jun 23 10:33:49 CEST 2017
APC : 001,039,0910
DATE : 2017-06-22 18:48:54 +0200
HOSTNAME : banana
VERSION : 3.14.14 (31 May 2016) debian
UPSNAME : APCUPS
CABLE : USB Cable
DRIVER : MODBUS UPS Driver
UPSMODE : Stand Alone
STARTTIME: 2017-06-22 14:06:35 +0200
MODEL : Smart-UPS 1500
STATUS : BOOST ONLINE
LINEV : 205.9 Volts
LOADPCT : 26.0 Percent
LOADAPNT : 23.4 Percent
BCHARGE : 100.0 Percent
TIMELEFT : 51.0 Minutes
MBATTCHG : -1 Percent
MINTIMEL : -1 Minutes
MAXTIME : 0 Seconds
OUTPUTV : 237.6 Volts
DWAKE : 0 Seconds
DSHUTD : 0 Seconds
ITEMP : 27.4 C
BATTV : 27.1 Volts
LINEFREQ : 50.0 Hz
OUTCURNT : 1.50 Amps
NUMXFERS : 0
TONBATT : 0 Seconds
CUMONBATT: 0 Seconds
XOFFBATT : N/A
SELFTEST : OK
STATFLAG : 0x0500000C
MANDATE : 2013-01-10
SERIALNO : AS1302223920
BATTDATE : 2016-12-15
NOMOUTV : 230 Volts
NOMPOWER : 1000 Watts
NOMAPNT : 1500 VA
FIRMWARE : UPS 09.3 / 00.4
END APC : 2017-06-23 10:33:49 +0200
You can see the DATE field is exactly the time where i stopped to

have

Post by Sandro Bordacchini
good readings.
Here https://pastebin.com/Xf6bLiZF you can read the apcupsd
configuration file.
Can anyone help me with this?
Thanks a lot.
Sandro.

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Pavel Boček

2017-07-06 09:30:38 UTC

Permalink

It's maybe because this device consumes about 1/10 of the power draw of any
idling ordinary PC you may get for free. Running a PC 24/7 doing nothing
else than being a UPS management server is kindaâŠstrange?
--
S uctivÃœm pozdravem/best regards,

Pavel BoÄek
Jabber: ***@jabber.cz
+420 739 190 151
http://www.hwworld.cz (kondenzÃ¡tory, akumulÃ¡tory, baterie aj./capacitors and
more)
http://www.hardwareinsights.com (power supply reviews and more)

---------- PÅ¯vodnÃ e-mail ----------
Od: Ted Mittelstaedt <***@mittelstaedt.us>
Komu: apcupsd-***@lists.sourceforge.net
Datum: 6. 7. 2017 10:13:00
PÅedmÄt: Re: [Apcupsd-users] apcaccess readings not up-to-date
"From:

http://linux-sunxi.org/LeMaker_Banana_Pi

"...The Raspberry's "original" serial port on GPIO 14 and 15 (CON3, pins
8 and 10 - at MMIO 0x1c28c00) can usually be accessed as /dev/ttyS2 on
the Banana Pi. J12 also provides another serial port on pins 4 (RXD) and
6 (TXD) at MMIO 0x1c29c00, which should map to /dev/ttyS3.."

You haven't said WHY you are wanting to use either a rasbperry or
bananna pi, but in my world, people hand me used PCs for free that run
Linux just fine - so I have never felt the need to invest money on
hardware to run apcupsd...

Ted

Post by Sandro Bordacchini
Thanks Trevor and Ted.
I am using the USB cables supplied with the UPSes.
Anyway, do you suggest me to figure out how to setup two serial ports on
the Banana (that's not a lot of documentation around) or invest some
money to buy a Raspberry and stick with USB cables?
Any other hint would be appreciated.
Thanks.
Send Apcupsd-users mailing list submissions to
To subscribe or unsubscribe via the World Wide Web, visit
https://lists.sourceforge.net/lists/listinfo/apcupsd-users
<https://lists.sourceforge.net/lists/listinfo/apcupsd-users>
or, via email, send a message with subject or body 'help' to
You can reach the person managing the list at
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Apcupsd-users digest..."
1. Re: apcaccess readings not up-to-date (Ted Mittelstaedt)
----------------------------------------------------------------------
Message: 1
Date: Sat, 24 Jun 2017 23:40:02 -0700 <tel:02%20-0700>
Subject: Re: [Apcupsd-users] apcaccess readings not up-to-date
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Your USB cables are probably poor quality. These devices have problems
with poor quality USB cables.
You also need to re-think this USB business. The bannana pi has 2
serial ports (according to the docs, I
haven't used one myself) and you should use those to connect to the
UPSes instead of USB.
Ted

Post by Sandro Bordacchini
Hello everyone.
I have a problem on my small server room, i hope someone here can

help

(armv7l

details on

rebooted the

have

Post by Sandro Bordacchini
good readings.
Here https://pastebin.com/Xf6bLiZF you can read the apcupsd
configuration file.
Can anyone help me with this?
Thanks a lot.
Sandro.

--------------------------------------------------------------------------

----

Post by Sandro Bordacchini

----

Post by Sandro Bordacchini
Check out the vibrant tech community on one of the world's most
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"

Allan Dyer

2017-07-06 11:10:45 UTC

Permalink

I'm not speaking for Sandro, and I appreciate other people have other
priorities, but I'm replacing some old PCs with Banana Pis (though
running apcupsd) for two main reasons:

1. Space. With some of the highest rents in the world, and some
residential "flats" less than 100 sq ft, space matters!

2. Power. An old PC might take 50W, a banana pi 5W. If you're running
24x7x365, then you've saved the cost of the new hardware in a year.

Regards

Allan

Post by Ted Mittelstaedt
http://linux-sunxi.org/LeMaker_Banana_Pi
"...The Raspberry's "original" serial port on GPIO 14 and 15 (CON3,
pins 8 and 10 - at MMIO 0x1c28c00) can usually be accessed as
/dev/ttyS2 on the Banana Pi. J12 also provides another serial port on
pins 4 (RXD) and 6 (TXD) at MMIO 0x1c29c00, which should map to
/dev/ttyS3.."
You haven't said WHY you are wanting to use either a rasbperry or
bananna pi, but in my world, people hand me used PCs for free that run
Linux just fine - so I have never felt the need to invest money on
hardware to run apcupsd...
Ted

Post by Sandro Bordacchini
Thanks Trevor and Ted.
I am using the USB cables supplied with the UPSes.
Anyway, do you suggest me to figure out how to setup two serial ports
on the Banana (that's not a lot of documentation around) or invest
some money to buy a Raspberry and stick with USB cables?
Any other hint would be appreciated.
Thanks.
2017-06-25 14:02 GMT+02:00
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When replying, please edit your Subject line so it is more specific
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1. Re: apcaccess readings not up-to-date (Ted Mittelstaedt)
----------------------------------------------------------------------
Message: 1
Date: Sat, 24 Jun 2017 23:40:02 -0700 <tel:02%20-0700>
Subject: Re: [Apcupsd-users] apcaccess readings not up-to-date
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Your USB cables are probably poor quality. These devices have problems
with poor quality USB cables.
You also need to re-think this USB business. The bannana pi has 2
serial ports (according to the docs, I
haven't used one myself) and you should use those to connect to the
UPSes instead of USB.
Ted

Post by Sandro Bordacchini
Hello everyone.
I have a problem on my small server room, i hope someone here can

help

Post by Sandro Bordacchini
me to figure out what's my problem.
I have a server rack powered by two SMT1500RMI2U, both

upgraded to FW

Post by Sandro Bordacchini
09.3.
I purchased a bananapi platform and installed a debian stretch

(armv7l

Post by Sandro Bordacchini
arch) to use the packaged apcupsd v.3.14.14 (31 May 2016).
After enabling modbus protocol on the UPSes, I connected them

to the

Post by Sandro Bordacchini
bananapi platform with two usb cables.
I work out a systemd configuration to have two distinct apcupsd
instances (with different nisport) running.
Then integrated that on a zabbix agent (i can give you more

details on

Post by Sandro Bordacchini
it) but basically i got apcaccess running once every minute

for each

Post by Sandro Bordacchini
apcupsd instance.
All was working smoothly, but I soon realized that the

readings were

Post by Sandro Bordacchini
good only for a short period (variable from tens of minutes to

some

Post by Sandro Bordacchini
hours), then they get constant.
I need to restart apcupsd to have again actual readings.
I thought this was due the two instances of apcupsd running on

the

Post by Sandro Bordacchini
same machine, so i removed one, disconnected one apcupsd,

rebooted the

have

Post by Sandro Bordacchini
good readings.
Here https://pastebin.com/Xf6bLiZF you can read the apcupsd
configuration file.
Can anyone help me with this?
Thanks a lot.
Sandro.

------------------------------------------------------------------------------

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Sandro Bordacchini

2017-07-10 09:38:44 UTC

Permalink

Hi everyone.

Sorry for my late reply, guys.
Yes, I actually agree with Pavel and Allan, power and space are issues in
my current server room implementation :-)

So I got a Raspberry Pi 3, installed raspbian, downloaded apcupsd 3.14.14
source code and configured with:

./configure --enable-modbus-usb --enable-modbus --enable-usb

Then i setup things to let two different instances run at the same time.
All is looking fine and working smoothly for 12 hours now.

Just one thing, if someone is reading this post try to obtain the same
result... at first i obtained a lot of dis/re connections and with this log
entry:

raspberrypi kernel: [ 1293.604752] usb 1-1.4: reset full-speed USB device
number 4 using dwc_otg

I fixed it disabling USB2.0 and downgrading to USB1.1
adding dwc_otg.speed=1 to /boot/cmdline.txt

Thanks to everyone.

Post by Allan Dyer
I'm not speaking for Sandro, and I appreciate other people have other
priorities, but I'm replacing some old PCs with Banana Pis (though running
1. Space. With some of the highest rents in the world, and some
residential "flats" less than 100 sq ft, space matters!
2. Power. An old PC might take 50W, a banana pi 5W. If you're running
24x7x365, then you've saved the cost of the new hardware in a year.
Regards
Allan

Post by Ted Mittelstaedt
http://linux-sunxi.org/LeMaker_Banana_Pi
"...The Raspberry's "original" serial port on GPIO 14 and 15 (CON3, pins
8 and 10 - at MMIO 0x1c28c00) can usually be accessed as /dev/ttyS2 on the
Banana Pi. J12 also provides another serial port on pins 4 (RXD) and 6
(TXD) at MMIO 0x1c29c00, which should map to /dev/ttyS3.."
You haven't said WHY you are wanting to use either a rasbperry or bananna
pi, but in my world, people hand me used PCs for free that run
Linux just fine - so I have never felt the need to invest money on
hardware to run apcupsd...
Ted

Post by Sandro Bordacchini
Thanks Trevor and Ted.
I am using the USB cables supplied with the UPSes.
Anyway, do you suggest me to figure out how to setup two serial ports on
the Banana (that's not a lot of documentation around) or invest some money
to buy a Raspberry and stick with USB cables?
Any other hint would be appreciated.
Thanks.
Send Apcupsd-users mailing list submissions to
To subscribe or unsubscribe via the World Wide Web, visit
https://lists.sourceforge.net/lists/listinfo/apcupsd-users
<https://lists.sourceforge.net/lists/listinfo/apcupsd-users>
or, via email, send a message with subject or body 'help' to
You can reach the person managing the list at
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Apcupsd-users digest..."
1. Re: apcaccess readings not up-to-date (Ted Mittelstaedt)
----------------------------------------------------------------------
Message: 1
Date: Sat, 24 Jun 2017 23:40:02 -0700 <tel:02%20-0700>
Subject: Re: [Apcupsd-users] apcaccess readings not up-to-date
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Your USB cables are probably poor quality. These devices have problems
with poor quality USB cables.
You also need to re-think this USB business. The bannana pi has 2
serial ports (according to the docs, I
haven't used one myself) and you should use those to connect to the
UPSes instead of USB.
Ted

Post by Sandro Bordacchini
Hello everyone.
I have a problem on my small server room, i hope someone here can

help

Post by Sandro Bordacchini
me to figure out what's my problem.
I have a server rack powered by two SMT1500RMI2U, both upgraded

to FW

Post by Sandro Bordacchini
09.3.
I purchased a bananapi platform and installed a debian stretch

(armv7l

Post by Sandro Bordacchini
arch) to use the packaged apcupsd v.3.14.14 (31 May 2016).
After enabling modbus protocol on the UPSes, I connected them to

the

details on

Post by Sandro Bordacchini
it) but basically i got apcaccess running once every minute for

each

Post by Sandro Bordacchini
apcupsd instance.
All was working smoothly, but I soon realized that the readings

were

Post by Sandro Bordacchini
good only for a short period (variable from tens of minutes to

some

Post by Sandro Bordacchini
hours), then they get constant.
I need to restart apcupsd to have again actual readings.
I thought this was due the two instances of apcupsd running on the
same machine, so i removed one, disconnected one apcupsd,

rebooted the

have

Post by Sandro Bordacchini
good readings.
Here https://pastebin.com/Xf6bLiZF you can read the apcupsd
configuration file.
Can anyone help me with this?
Thanks a lot.
Sandro.

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Stefanos Papadakis

2017-07-12 07:58:23 UTC

Permalink

Hi Sandro,

I am also experiencing the same problem with a Raspberry Pi 3, but with
some interesting details.
I had the exact same UPS & USB cable working flawlessly with a RPi 2 and
the 3.14.13 version for over a year. I recently updated the Raspberry Pi
and decided to compile the 3.14.14 version. Since then I observe two
different problems:
1. The exact same problem as yours with the "outdated" results from the
apcaccess
2. The TCP connections CLOSE_WAIT problem.

The first problem goes away at the moment I remove and reattach the USB
cable. Interestingly the apcaccess "senses" the commlost event! This
implies that although there is communication with the USB bus, the
results that it returns are not "refreshed".

The second problem appears randomly as the first one, and the service
stops working properly. By checking the network connections with the
command:
sudo lsof -p pid#
all the TCP connections hung at the CLOSE_WAIT state.
It does not seem to be related to the first problem. The log file has
entries like this one
apcserver: accept error. ERR=Too many open files
The service needs to be restarted in order to function again properly.
Of course the parameters regarding the open files are maximized, so
there is another issue that is responsible.

I am considering of installing the previous version (3.14.13) just to
make sure that is software (apcupsd) and not hardware (RPi 3) or OS
related problem.

The only thing that may stress the apcupsd is the frequent polling from
my PCs - every 10s, but they are only 2 or 3 active at the same time. In
any way, in the same setup RPi 2 with 3.14.13 had no issue.

Stefanos

Post by Sandro Bordacchini
Hi everyone.
Sorry for my late reply, guys.
Yes, I actually agree with Pavel and Allan, power and space are issues
in my current server room implementation :-)
So I got a Raspberry Pi 3, installed raspbian, downloaded apcupsd
./configure --enable-modbus-usb --enable-modbus --enable-usb
Then i setup things to let two different instances run at the same time.
All is looking fine and working smoothly for 12 hours now.
Just one thing, if someone is reading this post try to obtain the same
result... at first i obtained a lot of dis/re connections and with
raspberrypi kernel: [ 1293.604752] usb 1-1.4: reset full-speed USB
device number 4 using dwc_otg
I fixed it disabling USB2.0 and downgrading to USB1.1
adding dwc_otg.speed=1 to /boot/cmdline.txt
Thanks to everyone.
I'm not speaking for Sandro, and I appreciate other people have
other priorities, but I'm replacing some old PCs with Banana Pis
1. Space. With some of the highest rents in the world, and some
residential "flats" less than 100 sq ft, space matters!
2. Power. An old PC might take 50W, a banana pi 5W. If you're
running 24x7x365, then you've saved the cost of the new hardware
in a year.
Regards
Allan
http://linux-sunxi.org/LeMaker_Banana_Pi
<http://linux-sunxi.org/LeMaker_Banana_Pi>
"...The Raspberry's "original" serial port on GPIO 14 and 15
(CON3, pins 8 and 10 - at MMIO 0x1c28c00) can usually be
accessed as /dev/ttyS2 on the Banana Pi. J12 also provides
another serial port on pins 4 (RXD) and 6 (TXD) at MMIO
0x1c29c00, which should map to /dev/ttyS3.."
You haven't said WHY you are wanting to use either a rasbperry
or bananna pi, but in my world, people hand me used PCs for
free that run
Linux just fine - so I have never felt the need to invest money on
hardware to run apcupsd...
Ted
Thanks Trevor and Ted.
I am using the USB cables supplied with the UPSes.
Anyway, do you suggest me to figure out how to setup two
serial ports on the Banana (that's not a lot of
documentation around) or invest some money to buy a
Raspberry and stick with USB cables?
Any other hint would be appreciated.
Thanks.
2017-06-25 14:02 GMT+02:00
Send Apcupsd-users mailing list submissions to
To subscribe or unsubscribe via the World Wide Web, visit
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<https://lists.sourceforge.net/lists/listinfo/apcupsd-users>
<https://lists.sourceforge.net/lists/listinfo/apcupsd-users
<https://lists.sourceforge.net/lists/listinfo/apcupsd-users>>
or, via email, send a message with subject or body 'help' to
You can reach the person managing the list at
When replying, please edit your Subject line so it is
more specific
than "Re: Contents of Apcupsd-users digest..."
1. Re: apcaccess readings not up-to-date (Ted Mittelstaedt)
----------------------------------------------------------------------
Message: 1
Date: Sat, 24 Jun 2017 23:40:02 -0700 <tel:02%20-0700>
<tel:02%20-0700>
Subject: Re: [Apcupsd-users] apcaccess readings not up-to-date
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Your USB cables are probably poor quality. These
devices have problems
with poor quality USB cables.
You also need to re-think this USB business. The
bannana pi has 2
serial ports (according to the docs, I
haven't used one myself) and you should use those to
connect to the
UPSes instead of USB.
Ted

Post by Sandro Bordacchini
Hello everyone.
I have a problem on my small server room, i hope

someone here can
help

Post by Sandro Bordacchini
me to figure out what's my problem.
I have a server rack powered by two SMT1500RMI2U,

both upgraded to FW

Post by Sandro Bordacchini
09.3.
I purchased a bananapi platform and installed a

debian stretch
(armv7l

Post by Sandro Bordacchini
arch) to use the packaged apcupsd v.3.14.14 (31 May

2016).

Post by Sandro Bordacchini
After enabling modbus protocol on the UPSes, I

connected them to the

Post by Sandro Bordacchini
bananapi platform with two usb cables.
I work out a systemd configuration to have two

distinct apcupsd

Post by Sandro Bordacchini
instances (with different nisport) running.
Then integrated that on a zabbix agent (i can give

you more
details on

Post by Sandro Bordacchini
it) but basically i got apcaccess running once

every minute for each

Post by Sandro Bordacchini
apcupsd instance.
All was working smoothly, but I soon realized that

the readings were

Post by Sandro Bordacchini
good only for a short period (variable from tens of

minutes to some

Post by Sandro Bordacchini
hours), then they get constant.
I need to restart apcupsd to have again actual

readings.

Post by Sandro Bordacchini
I thought this was due the two instances of apcupsd

running on the

Post by Sandro Bordacchini
same machine, so i removed one, disconnected one

apcupsd,
rebooted the

Post by Sandro Bordacchini
device.
But the problem is still there. Maybe, but that

could be only a

Post by Sandro Bordacchini
coincidence, the period was longer than before.
This https://ibb.co/bxy2DQ is the zabbix graph, you

can see that

Post by Sandro Bordacchini
readings become constant just before 18:50.
Fri Jun 23 10:33:49 CEST 2017
APC : 001,039,0910
DATE : 2017-06-22 18:48:54 +0200
HOSTNAME : banana
VERSION : 3.14.14 (31 May 2016) debian
UPSNAME : APCUPS
CABLE : USB Cable
DRIVER : MODBUS UPS Driver
UPSMODE : Stand Alone
STARTTIME: 2017-06-22 14:06:35 +0200
MODEL : Smart-UPS 1500
STATUS : BOOST ONLINE
LINEV : 205.9 Volts
LOADPCT : 26.0 Percent
LOADAPNT : 23.4 Percent
BCHARGE : 100.0 Percent
TIMELEFT : 51.0 Minutes
MBATTCHG : -1 Percent
MINTIMEL : -1 Minutes
MAXTIME : 0 Seconds
OUTPUTV : 237.6 Volts
DWAKE : 0 Seconds
DSHUTD : 0 Seconds
ITEMP : 27.4 C
BATTV : 27.1 Volts
LINEFREQ : 50.0 Hz
OUTCURNT : 1.50 Amps
NUMXFERS : 0
TONBATT : 0 Seconds
CUMONBATT: 0 Seconds
XOFFBATT : N/A
SELFTEST : OK
STATFLAG : 0x0500000C
MANDATE : 2013-01-10
SERIALNO : AS1302223920
BATTDATE : 2016-12-15
NOMOUTV : 230 Volts
NOMPOWER : 1000 Watts
NOMAPNT : 1500 VA
FIRMWARE : UPS 09.3 / 00.4
END APC : 2017-06-23 10:33:49 +0200
You can see the DATE field is exactly the time

where i stopped to
have

Post by Sandro Bordacchini
good readings.
Here https://pastebin.com/Xf6bLiZF you can read the

apcupsd

Post by Sandro Bordacchini
configuration file.
Can anyone help me with this?
Thanks a lot.
Sandro.

------------------------------------------------------------------------------

Post by Sandro Bordacchini
Check out the vibrant tech community on one of the

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Post by Sandro Bordacchini
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Post by Sandro Bordacchini
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Sandro Bordacchini

2017-07-12 08:47:15 UTC

Permalink

Hi Stefanos.

Thanks for your post, it's very interesting, even if I never experienced
the 2nd problem so far.

About the 1st one, i saw it once, and that's a major improvement from what
experienced on the banana.
Unfortunately the problem seems to be still there.
I wonder if i could have obtained same results disabling usb 2.0.

I am still studying the situation, and see if the 1st problem will happen
again so i can dig in a little bit more.

My polling times are more relaxed: POLLTIME is 60 on both daemons, and my
monitoring agent launches apcaccess every 60secs for each instance.

Looking forward to read your findings.

S.

Post by Stefanos Papadakis
Hi Sandro,
I am also experiencing the same problem with a Raspberry Pi 3, but with
some interesting details.
I had the exact same UPS & USB cable working flawlessly with a RPi 2 and
the 3.14.13 version for over a year. I recently updated the Raspberry Pi
and decided to compile the 3.14.14 version. Since then I observe two
1. The exact same problem as yours with the "outdated" results from the
apcaccess
2. The TCP connections CLOSE_WAIT problem.
The first problem goes away at the moment I remove and reattach the USB
cable. Interestingly the apcaccess "senses" the commlost event! This
implies that although there is communication with the USB bus, the
results that it returns are not "refreshed".
The second problem appears randomly as the first one, and the service
stops working properly. By checking the network connections with the
sudo lsof -p pid#
all the TCP connections hung at the CLOSE_WAIT state.
It does not seem to be related to the first problem. The log file has
entries like this one
apcserver: accept error. ERR=Too many open files
The service needs to be restarted in order to function again properly.
Of course the parameters regarding the open files are maximized, so
there is another issue that is responsible.
I am considering of installing the previous version (3.14.13) just to
make sure that is software (apcupsd) and not hardware (RPi 3) or OS
related problem.
The only thing that may stress the apcupsd is the frequent polling from
my PCs - every 10s, but they are only 2 or 3 active at the same time. In
any way, in the same setup RPi 2 with 3.14.13 had no issue.
Stefanos

Post by Sandro Bordacchini
hardware to run apcupsd...
Ted
Thanks Trevor and Ted.
I am using the USB cables supplied with the UPSes.
Anyway, do you suggest me to figure out how to setup two
serial ports on the Banana (that's not a lot of
documentation around) or invest some money to buy a
Raspberry and stick with USB cables?
Any other hint would be appreciated.
Thanks.
2017-06-25 14:02 GMT+02:00
Send Apcupsd-users mailing list submissions to
To subscribe or unsubscribe via the World Wide Web, visit
https://lists.sourceforge.net/lists/listinfo/apcupsd-users
<https://lists.sourceforge.net/lists/listinfo/apcupsd-users>
<https://lists.sourceforge.net/lists/listinfo/apcupsd-users
<https://lists.sourceforge.net/lists/listinfo/apcupsd-users
or, via email, send a message with subject or body
'help' to
You can reach the person managing the list at
When replying, please edit your Subject line so it is
more specific
than "Re: Contents of Apcupsd-users digest..."
1. Re: apcaccess readings not up-to-date (Ted
Mittelstaedt)
------------------------------------------------------------

----------

Post by Sandro Bordacchini
Message: 1
Date: Sat, 24 Jun 2017 23:40:02 -0700 <tel:02%20-0700>
<tel:02%20-0700>
Subject: Re: [Apcupsd-users] apcaccess readings not
up-to-date
Content-Type: text/plain; charset="utf-8";

Format="flowed"

Post by Sandro Bordacchini
Your USB cables are probably poor quality. These
devices have problems
with poor quality USB cables.
You also need to re-think this USB business. The
bannana pi has 2
serial ports (according to the docs, I
haven't used one myself) and you should use those to
connect to the
UPSes instead of USB.
Ted

Post by Sandro Bordacchini
Hello everyone.
I have a problem on my small server room, i hope

someone here can
help

Post by Sandro Bordacchini
me to figure out what's my problem.
I have a server rack powered by two SMT1500RMI2U,

both upgraded to FW

Post by Sandro Bordacchini
09.3.
I purchased a bananapi platform and installed a

debian stretch
(armv7l

Post by Sandro Bordacchini
arch) to use the packaged apcupsd v.3.14.14 (31 May

2016).

Post by Sandro Bordacchini
After enabling modbus protocol on the UPSes, I

connected them to the

Post by Sandro Bordacchini
bananapi platform with two usb cables.
I work out a systemd configuration to have two

distinct apcupsd

Post by Sandro Bordacchini
instances (with different nisport) running.
Then integrated that on a zabbix agent (i can give

you more
details on

Post by Sandro Bordacchini
it) but basically i got apcaccess running once

every minute for each

Post by Sandro Bordacchini
apcupsd instance.
All was working smoothly, but I soon realized that

the readings were

Post by Sandro Bordacchini
good only for a short period (variable from tens of

minutes to some

Post by Sandro Bordacchini
hours), then they get constant.
I need to restart apcupsd to have again actual

readings.

Post by Sandro Bordacchini
I thought this was due the two instances of apcupsd

running on the

Post by Sandro Bordacchini
same machine, so i removed one, disconnected one

apcupsd,
rebooted the

Post by Sandro Bordacchini
device.
But the problem is still there. Maybe, but that

could be only a

Post by Sandro Bordacchini
coincidence, the period was longer than before.
This https://ibb.co/bxy2DQ is the zabbix graph, you

can see that

where i stopped to
have

Post by Sandro Bordacchini
good readings.
Here https://pastebin.com/Xf6bLiZF you can read the

apcupsd

Post by Sandro Bordacchini
configuration file.
Can anyone help me with this?
Thanks a lot.
Sandro.

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Post by Sandro Bordacchini
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http://sdm.link/slashdot

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