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SMT1500 firmware update | Smart-UPS & Symmetra LX / RM

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SMT1500 firmware update

Discussion in Smart-UPS & Symmetra LX / RM started by Alex , 2/11/2019 2:41 PM
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SMT1500 firmware update

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  • modem7

    Hey guys,

    Just double checking I'm not being a muppet, and if I am, how to alieviate that!

    I've just got a second hand SMT1500 UPS, and I'm looking to upgrade to the latest firmware (especially if I can get modbus).

    UPS model: Smart-UPS 1500

    UPS Part number: SMT1500I

    UPS Serial Number: AS1119123502

    UPS Firmware 1: UPS 07.1

    UPS Firmware 2: MCU 05.0

    UPS Firmware 3: UBL 7.20

    UPS Firmware 4: MBL 05.0

    I'm just curious, is this already at the latest firmware, or am I able to upgrade to v9.4?

    Only reason I'm looking to upgrade the firmware, is that I don't seem to be getting certain stats via USB like line voltage, frequency etc:

    APC      : 001,027,0670
    DATE     : 2019-02-11 14:39:56 +0000
    HOSTNAME : localhost.localdomain
    VERSION  : 3.14.14 (31 May 2016) redhat
    CABLE    : USB Cable
    DRIVER   : USB UPS Driver
    UPSMODE  : Stand Alone
    STARTTIME: 2019-02-11 13:13:11 +0000
    MODEL    : Smart-UPS 1500
    BCHARGE  : 100.0 Percent
    TIMELEFT : 65.0 Minutes
    MBATTCHG : 5 Percent
    MINTIMEL : 3 Minutes
    MAXTIME  : 0 Seconds
    ALARMDEL : 30 Seconds
    BATTV    : 27.4 Volts
    NUMXFERS : 0
    TONBATT  : 0 Seconds
    CUMONBATT: 0 Seconds
    STATFLAG : 0x05000008
    MANDATE  : 2011-05-08
    SERIALNO : AS1119123502
    NOMBATTV : 24.0 Volts
    FIRMWARE : UPS 07.1 / ID=17
    END APC  : 2019-02-11 14:40:02 +0000

    Thanks in advance!

  • liamg

    Hi Alex - 

    That's a pretty early unit (2011) and unfortunately UPS 7.1 was the latest version that was supported. You would require a unit with 8.0 or later to upgrade to the most recent rev (9.4). Those units include Modbus support.

    You can find firmware upgrade information here:




  • modem7

    Ahhah! Gotcha!

    If that's the case, is it normal that via USB, the UPS isn't reporting info such as in/out voltage and load on Linux?


  • liamg

    That's a good question. We have never formally supported USB on Linux and communication was definitely enhanced on later SMT1500's (after ModBus support was rolled out). Perhaps one of my more communications savvy counterparts will chime in with some specifics...

    If you haven't already, definitely check out this app note:



  • UnexpectedBill

    Unfortunately, it's normal to get less information from the early Microlink UPSes like the model you have, when using the generic USB HID UPS protocol and third party monitoring software. As was mentioned, you've already got the latest firmware for your particular UPS.

    Microlink is (unfortunately) a closed protocol and I'm not aware of any reverse engineering efforts. On a later revision UPS with newer firmware, you could enable the Modbus protocol and be able to see far more comprehensive information.

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