Battery status monitor

This is a small program that monitors battery status through UPower's DBus interface and outputs status updates as JSON.

I use it to serve battery information for the battery widget on my status bar.

Reported information

• battery percentage
• wattage information
• status (charging, discharging, fully_charged, not_charging, unknown)
• time to full
• time to empty

Features

• Notification-based: The program is notified of changes, not polling for them.
  • Optionally, you can specify a force polling interval (--min-poll-interval) if you want.
• Alert: Run a custom alert command on low battery.
• Repeated alert: Run the alert command every X seconds if the battery remains low.
• Lightweight: The program is carefully crafted and uses negligible resources.

Usage

$ batry --help
Usage: batry [OPTIONS]

Options:
  -i, --min-poll-interval <MIN_POLL_INTERVAL>
          Minimal polling interval in seconds. If not set, the monitor will only poll when the power source or battery status changes.
  -t, --alert-threshold <ALERT_THRESHOLD>
          Alert threshold in percent. If the battery percentage is below this threshold, the alert command will be executed [default: 10].
  -c, --alert-command <ALERT_COMMAND>
          Command to execute when the battery percentage is below the alert threshold. The command will be executed with `sh -c`.
  -r, --alert-refire-interval <ALERT_REFIRE_INTERVAL>
          Refire interval in seconds. The alert command will only be executed once every `alert_refire_interval` seconds as long as the battery percentage is below the alert threshold.
  -h, --help
          Print help.
  -V, --version
          Print version.

The output in each line is in JSON format.

Build

You can run cargo build --release to build the program.