Pebble.System

System-state commands and subscriptions sourced from Pebble event services.

Poll once in init, then subscribe to live updates for battery and phone link.

import Pebble.System as System

type Msg
    = GotBattery Int
    | BatteryChanged Int
    | GotConnection Bool
    | ConnectionChanged Bool

init _ =
    ( model
    , Cmd.batch
        [ System.batteryLevel GotBattery
        , System.connectionStatus GotConnection
        ]
    )

subscriptions _ =
    Sub.batch
        [ System.onBatteryChange BatteryChanged
        , System.onConnectionChange ConnectionChanged
        ]

For a runnable example, use the watch-demo-system project template in the IDE.