Fitbit Schedule

Fitbit Schedule allows you to schedule persistent recurring and non-recurring events on Fitbit OS. This module is useful for reminders, timers, and other events that need to survive changes in the app life cycle. It also provides a method for handling missed events (e.g. if the event comes due when the device is off or another app is running).

Usage

This module assumes you're using the Fitbit CLI in your workflow, which allows you to manage packages using npm.

Installation

npm i fitbit-schedule

Fitbit Schedule has a uniform API that works on both the app and the companion. The only difference is the module name in the import statement, which is fitbit-schedule/app for the app and fitbit-schedule/companion for the companion.

Examples

A non-recurring event can be scheduled by supplying the due parameter with a UNIX timestamp (in milliseconds).

import schedule from "fitbit-schedule/app"

schedule.add({
  data: "See you in an hour...",
  due: Date.now() + 3600000
})

schedule.ondue = event => {
  console.log(event.data) // See you in an hour...
}

A recurring event can be scheduled by supplying the due parameter with an object that describes the recurrence pattern. Currently, only weekly patterns are supported.

import schedule from "fitbit-schedule/app"

schedule.add({
  data: "Lunch time!",
  due: {
    times: ["12:00"],
    days: [0, 1, 2, 3, 4, 5, 6]
  }
})

schedule.ondue = event => {
  console.log(event.data) // Lunch time!
}

API

schedule.add(event)

Add a new event. Returns the event ID.

event Object

The event to be created.

event.data Any

The data contained within the event.

event.due Number or Object

The time at which the event should be triggered. For a non-recurring event, due should be a UNIX timestamp in milliseconds. For a recurring event, due should be an object with the following properties:

• times An array of 24-hour time strings in the format HH:MM. The default is 12:00.
• dates An array of days of the week, where 0 = Sunday, 1 = Monday, etc. The default is [0, 1, 2, 3, 4, 5, 6].

event.tolerance Number

The amount of acceptable delay in milliseconds. It may not always be possible to trigger the event at the exact time specified by the due parameter (e.g. if the device is turned off or another app is running). If an event is past due when the app repoens, the ondue handler will be called only if the time elapsed since due is less than tolerance. Otherwise, the onmissed handler will be called. The default tolerance is 900000 (15 minutes).

schedule.remove(id)

Remove an event. If id is omitted, all events are removed.

id Number

The ID of the event to be deleted.

schedule.ondue = event => { ... }

Called when an event comes due.

schedule.onmissed = event => { ... }

Called when an event is missed.

Important: when multiple recurring events are missed, the onmissed handler will only fire for the first missed occurrence.