nut

Network UPS Tools: Monitor and manage power devices via network

brewmacoslinux

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Network UPS Tools: Support for various power devices

upscupsdupsmonupscmdnutscannutconf

Query UPS status and get battery charge percentage$ upsc myups@localhost battery.charge

List all variables available from a connected UPS$ upsc myups@localhost

Scan network for available UPS devices$ nutscan -m usb