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bcmxcp_usb - Man Page

Experimental driver for UPSes supporting the BCM/XCP protocol over USB


bcmxcp_usb -h

bcmxcp_usb -a UPS_NAME [OPTIONS]


This man page only documents the hardware-specific features of the bcmxcp_usb driver. For information about the core driver, see nutupsdrv(8).


This driver is a variant of the serial driver bcmxcp(8) and uses the same core code.

Supported Hardware

This driver should recognize all BCM/XCP-compatible UPSes that are connected via USB. It has been developed and tested on Powerware PW3501 hardware. It also has been tested on PW5110 hardware.

Extra Arguments

This driver supports the following optional settings in the ups.conf(5).

shutdown_delay = delay

The number of seconds that the UPS should wait between receiving the shutdown command and actually shutting off.


This driver does not currently support USB-matching settings common to other drivers, such as vendor, vendorid, product, productid, serial, device or bus.

Default Values for the Extra Arguments

shutdown_delay =120

Instant Commands

This driver supports the following Instant Commands:


Turn off the load and return when power is back.


Turn off the load and remain off.


Start a battery test.

Todo List

Report UPS alarm status

BCM/XCP supports reporting a wide range of UPS alarm conditions.

Report UPS statistics information

BCM/XCP supports reporting of UPS statistics data.

Experimental Driver

This driver has been tagged experimental, even if it has been reported to be stable. Thus it is not suitable for production systems and it is not built by default. This is mainly due to the fact that it is a new driver.


This driver is not built by default. You can build it by using "configure --with-usb=yes". Note that it will also install other USB drivers.

You also need to install manually the hotplug files (libhidups and libhid.usermap), generally in etc/hotplug/usb/, to address the permission settings problem. Lastly note that the libhidups file must have execution flag set (ie using chmod +x ...).


bcmxcp_usb only supports 1 UPS at this time. You can put the "auto" value for port in ups.conf, i.e.:

        driver = bcmxcp_usb
        port = auto

Known Issues and Bugs

Got EPERM: Operation not permitted upon driver startup“”

You have forgotten to install the hotplug files, as explained in the Installation section above. Don’t forget to restart hotplug so that it applies these changes.


See Also

The core driver


Internet resources

The NUT (Network UPS Tools) home page: https://www.networkupstools.org/

Referenced By

bcmxcp(8), nutupsdrv(8), upsd(8).

04/02/2024 Network UPS Tools 2.8.2 NUT Manual