Hello In case anyone is interested and for the sake of updating the documentation from http://networkupstools.org/stable-hcl.html , I would like to report that nut v2.7.4 talks successfully ( at least partially ) with the UPS from $topic, which is part of the product line from http://www.informups.com/guardian_guardian_lcd600va_2000va.html ( Inform is a Turkish manufacturer that was acquired by Legrand a couple of years ago so now all their products are branded as "Inform by Legrand" or even just Legrand ) Some technical data: - the OS is centos 6 fully updated, using my own rpm packages for nut-2.7.4 ( https://wolfy.fedorapeople.org/nut/ ) - other info ( ups.conf setting , USB related messages from /var/log/messages, output from upsc ) is included in the attached file. - during the last 3 days I have tested several drivers that seemed appropriate. The only one that worked properly is nutdrv_qx with protocol q1 ( blazer_usb, usbhid-ups, powercom as well as all other protocols implemented by nutdrv_qx did not work for me ) Leaving aside the rather odd value for the battery voltage ( which should be fully charged as there is nothing at all connected to the UPS and it's been powered for several days already ) , one question: what's the proper approach that a sane person should use to tackle 12.311259 Can't autodetect number of battery packs [-1/27.70] 12.311264 Battery runtime will not be calculated (runtimecal not set) ? I guess I should run with simulated loads, see how long the battery lasts and use runtimecal, right ? wolfy -- Manuel Wolfshant linux registered user #131416 IT manager NoBug Consulting SRL A: Yes. >Q: Are you sure? >>A: Because it reverses the logical flow of conversation. >>>Q: Why is top posting frowned upon? -------------- next part -------------- # lsusb -s 2:7 -v Bus 002 Device 007: ID 0001:0000 Fry's Electronics Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 1.10 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 8 idVendor 0x0001 Fry's Electronics idProduct 0x0000 bcdDevice 1.00 iManufacturer 1 iProduct 2 MEC0003 iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 34 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 (Bus Powered) MaxPower 100mA 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 1.00 bCountryCode 0 Not supported bNumDescriptors 1 bDescriptorType 34 Report wDescriptorLength 624 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 # tail -9 /etc/ups/ups.conf [guardian] driver = nutdrv_qx port = auto desc = "Guardian LCD 1500 AP by Inform" #manufacturer = Inform #modelname = "Guardian LCD 1500 AP" vendorid = 0001 productID = 0000 protocol = q1 excerpt from /var/log/messages: Jan 3 13:50:06 tunis kernel: usb 2-1.2: new low speed USB device number 6 using ehci_hcd Jan 3 13:50:16 tunis kernel: usb 2-1.2: New USB device found, idVendor=0001, idProduct=0000 Jan 3 13:50:16 tunis kernel: usb 2-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 Jan 3 13:50:16 tunis kernel: usb 2-1.2: Product: MEC0003 Jan 3 13:50:16 tunis kernel: usb 2-1.2: configuration #1 chosen from 1 choice Jan 3 13:50:16 tunis kernel: generic-usb 0003:0001:0000.0003: hiddev96,hidraw0: USB HID v1.00 Device [MEC0003] on usb-0000:00:1d.0-1.2/input0 # /usr/bin/upsc guardian at localhost battery.voltage: 27.70 device.type: ups driver.name: nutdrv_qx driver.parameter.pollfreq: 30 driver.parameter.pollinterval: 2 driver.parameter.port: auto driver.parameter.productID: 0000 driver.parameter.synchronous: no driver.parameter.vendorid: 0001 driver.version: 2.7.4 driver.version.data: Q1 0.07 driver.version.internal: 0.28 input.frequency: 50.0 input.voltage: 233.3 input.voltage.fault: 233.3 output.voltage: 233.3 ups.beeper.status: enabled ups.delay.shutdown: 30 ups.delay.start: 180 ups.load: 0 ups.productid: 0000 ups.status: OL ups.type: offline / line interactive ups.vendorid: 0001