September 17, 20169 yr Running unRAID 6.1.9 w/ an APC SMT750 running the latest 9.3 firmware. modbus is enabled on the UPS front panel. Connecting via USB I can get limited info in unraid by setting cabletype and upstype to "usb". When I switch to upstype to "modbus" communication is lost. Has anyone been able to use modbus over USB on any UPS platform? I suspect there may be an issue with the implementation of apcupsd on unRAID. Bonus: Has LT upgraded to the latest 3.14.14 version of apcupsd in 6.2? There are some fixes specific to modbus: https://sourceforge.net/p/apcupsd/svn/HEAD/tree/tags/Release-3_14_14/ReleaseNotes
September 19, 20169 yr Author UPDATE: I got this figured out. I found that apcupsd needs to be built with the './configure --modbus-usb' flag in order to enable this functionality. It doesn't appear that the binary in unRAID was built like this. For anyone wanting modbus over USB, I used a full slackware dev system to build a package with the correct flags. I'd be happy to share it. I've got it sitting in /boot/extra for now and it works great.
September 19, 20169 yr Hi, What are the real benefits to use modbus instead of the normal USB in unRAID scenario? I tried to find some useful info about this but with no real success. I have an APC Back-UPS RS 900G and I'm looking for any kind of improvements. In my UPS section i get this data: root@Tower:~# apcaccess status APC : 001,036,0880 DATE : 2016-09-19 20:28:07 +0300 HOSTNAME : Tower VERSION : 3.14.13 (02 February 2015) slackware UPSNAME : Tower CABLE : USB Cable DRIVER : USB UPS Driver UPSMODE : Stand Alone STARTTIME: 2016-09-18 04:40:04 +0300 MODEL : Back-UPS RS 900G STATUS : ONLINE LINEV : 228.0 Volts LOADPCT : 8.0 Percent BCHARGE : 100.0 Percent TIMELEFT : 128.2 Minutes MBATTCHG : 30 Percent MINTIMEL : 10 Minutes MAXTIME : 0 Seconds SENSE : Medium LOTRANS : 176.0 Volts HITRANS : 294.0 Volts ALARMDEL : 30 Seconds BATTV : 27.3 Volts LASTXFER : Unacceptable line voltage changes NUMXFERS : 0 TONBATT : 0 Seconds CUMONBATT: 0 Seconds XOFFBATT : N/A SELFTEST : NO STATFLAG : 0x05000008 SERIALNO : 3B1608X20796 BATTDATE : 2016-02-28 NOMINV : 230 Volts NOMBATTV : 24.0 Volts NOMPOWER : 540 Watts FIRMWARE : 879.L4 .I USB FW:L4 END APC : 2016-09-19 20:28:09 +0300 Do I get more settings or more info if i use modbus instead? Thank you.
September 20, 20169 yr Author Unfortunately, I don't think the RS series supports modbus. Modbus has been added mainly to their "Smart-UPS" line, and even then only the very latest firmware. Devices older than ~2013 generally won't support it at all. The main difference is that modbus is an open protocol, allowing better support for third-party monitoring of the UPS by things like unRAID(apcupsd). In my case I have an SMT750 that provided only very basic information over USB. I couldn't even see load percent: APC : 001,027,0653 DATE : 2016-09-19 19:14:17 -0600 HOSTNAME : NAS VERSION : 3.14.14 (31 May 2016) slackware UPSNAME : NAS CABLE : USB Cable DRIVER : USB UPS Driver UPSMODE : Stand Alone STARTTIME: 2016-09-19 19:14:09 -0600 MODEL : Smart-UPS 750 STATUS : ONLINE BCHARGE : 100.0 Percent TIMELEFT : 40.0 Minutes MBATTCHG : 30 Percent MINTIMEL : 10 Minutes MAXTIME : 0 Seconds ALARMDEL : 30 Seconds BATTV : 27.1 Volts NUMXFERS : 0 TONBATT : 0 Seconds CUMONBATT: 0 Seconds XOFFBATT : N/A STATFLAG : 0x05000008 MANDATE : 2013-03-04 SERIALNO : AS1310110083 NOMBATTV : 24.0 Volts FIRMWARE : UPS 09.3 / ID=18 END APC : 2016-09-19 19:14:18 -0600 After enabling modbus, I'm able to collect much more data: APC : 001,039,0902 DATE : 2016-09-19 19:11:58 -0600 HOSTNAME : NAS VERSION : 3.14.14 (31 May 2016) slackware UPSNAME : APCUPS CABLE : USB Cable DRIVER : MODBUS UPS Driver UPSMODE : Stand Alone STARTTIME: 2016-09-17 20:28:53 -0600 MODEL : Smart-UPS 750 STATUS : ONLINE LINEV : 122.4 Volts LOADPCT : 17.5 Percent LOADAPNT : 14.3 Percent BCHARGE : 100.0 Percent TIMELEFT : 41.0 Minutes MBATTCHG : 30 Percent MINTIMEL : 10 Minutes MAXTIME : 0 Seconds OUTPUTV : 122.4 Volts DWAKE : 0 Seconds DSHUTD : 90 Seconds ITEMP : 28.8 C BATTV : 27.1 Volts LINEFREQ : 60.0 Hz OUTCURNT : 0.88 Amps NUMXFERS : 0 TONBATT : 0 Seconds CUMONBATT: 0 Seconds XOFFBATT : N/A SELFTEST : OK STATFLAG : 0x05000008 MANDATE : 2013-03-04 SERIALNO : AS1310110083 BATTDATE : 2013-03-04 NOMOUTV : 120 Volts NOMPOWER : 500 Watts NOMAPNT : 750 VA FIRMWARE : UPS 09.3 / 00.4 END APC : 2016-09-19 19:12:00 -0600 The main factor for me was that I wanted to see realtime load in watts and percent utilization. The good news is it looks like your RS 900G gives quite a bit of data over the standard USB protocol. More than my SMT750 did.
September 20, 20169 yr Thank you for your reply. As far as I can tell from your results, it looks like I was getting better results with normal USB anyway. As you can see, mine already showing the power consumption and also the remaining time on battery. I'm looking forward to find a way to stop a particular docker container if the UPS runs on battery. That's why I asked if you get new settings if you use modbus instead. Thank you again.
February 27, 20179 yr Author FYI, modbus is now supported as of unRAID 6.3.1. They also bumped the build to the latest 3.14.14. Thanks, Lime-Tech!
February 8, 20206 yr On 9/19/2016 at 5:55 AM, highspeed said: UPDATE: I got this figured out. I found that apcupsd needs to be built with the './configure --modbus-usb' flag in order to enable this functionality. It doesn't appear that the binary in unRAID was built like this. For anyone wanting modbus over USB, I used a full slackware dev system to build a package with the correct flags. I'd be happy to share it. I've got it sitting in /boot/extra for now and it works great. Hi, I have the same Issue as you did. Ups is APC750I and trying to use with HASSIO and apcupsd plugin. Could you please explain how I can build apcupsd - do I need to fork apcupsd and do something with it, then install modified version?
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