[Nut-upsuser] Cyberpower Value1200E might not need 0.667 battery scaling

[Matthew Stapleton]

I just got a Cyberpower SOHO Value 1200 ELCD UPS and even with nut 
2.7.2, it appears to report battery voltage too low due to the battery 
scaling function (In drivers/cps-hid.c).  Even though the ups has usb 
id: 0764:0501, UPS.PowerSummary.Voltage reports 26.6 for the 24V 
batteries so when the 0.667 battery scale is applied that goes down to 
17.7V.

upsc output:
battery.charge: 100
battery.charge.low: 10
battery.charge.warning: 20
battery.mfr.date: CPS
battery.runtime: 3012
battery.runtime.low: 300
battery.type: PbAcid
battery.voltage: 17.7
battery.voltage.nominal: 24
device.mfr: CPS
device.model: Value1200E
device.type: ups
driver.name: usbhid-ups
driver.parameter.offdelay: 20
driver.parameter.ondelay: 1
driver.parameter.pollfreq: 30
driver.parameter.pollinterval: 2
driver.parameter.port: auto
driver.version: 2.7.2
driver.version.data: CyberPower HID 0.3
driver.version.internal: 0.38
input.transfer.high: 0
input.transfer.low: 0
input.voltage: 235.0
input.voltage.nominal: 230
output.voltage: 239.0
ups.beeper.status: enabled
ups.delay.shutdown: 20
ups.delay.start: 1
ups.load: 11
ups.mfr: CPS
ups.model: Value1200E
ups.productid: 0501
ups.realpower.nominal: 720
ups.status: OL
ups.test.result: No test initiated
ups.timer.shutdown: -60
ups.timer.start: -60
ups.vendorid: 0764

Full usb descriptor from lsusb:
Bus 002 Device 016: ID 0764:0501 Cyber Power System, Inc. CP1500 AVR UPS
Device Descriptor:
   bLength                18
   bDescriptorType         1
   bcdUSB               1.10
   bDeviceClass            0 (Defined at Interface level)
   bDeviceSubClass         0
   bDeviceProtocol         0
   bMaxPacketSize0         8
   idVendor           0x0764 Cyber Power System, Inc.
   idProduct          0x0501 CP1500 AVR UPS
   bcdDevice            0.01
   iManufacturer           3 CPS
   iProduct                1 Value1200E
   iSerial                 0
   bNumConfigurations      1
   Configuration Descriptor:
     bLength                 9
     bDescriptorType         2
     wTotalLength           34
     bNumInterfaces          1
     bConfigurationValue     1
     iConfiguration          0
     bmAttributes         0x80
       (Bus Powered)
     MaxPower               50mA
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        0
       bAlternateSetting       0
       bNumEndpoints           1
       bInterfaceClass         3 Human Interface Device
       bInterfaceSubClass      0 No Subclass
       bInterfaceProtocol      0 None
       iInterface              0
         HID Device Descriptor:
           bLength                 9
           bDescriptorType        33
           bcdHID               1.10
           bCountryCode           33 US
           bNumDescriptors         1
           bDescriptorType        34 Report
           wDescriptorLength     518
          Report Descriptors:
            ** UNAVAILABLE **
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x81  EP 1 IN
         bmAttributes            3
           Transfer Type            Interrupt
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0008  1x 8 bytes
         bInterval              10
Device Status:     0x0000
   (Bus Powered)

-- 
Matthew Stapleton
Email: matthew4196 at gmail.com