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title: Events and Services
description: |
  How to get data from the onboard sensors including the accelerometer, compass,
  and microphone.
guide_group: events-and-services
menu: false
permalink: /guides/events-and-services/
generate_toc: false
hide_comments: true
---

All Pebble watches contain a collection of sensors than can be used as input
devices for apps. Available sensors include four buttons, an accelerometer, and
a magnetometer (accessible via the ``CompassService`` API). In addition, the
Basalt and Chalk platforms also include a microphone (accessible via the
``Dictation`` API) and access to Pebble Health data sets. Read 
{% guide_link tools-and-resources/hardware-information %} for more information
on sensor availability per platform.

While providing more interactivity, excessive regular use of these sensors will
stop the watch's CPU from sleeping and result in faster battery drain, so use
them sparingly. An alternative to constantly reading accelerometer data is to
obtain data in batches, allowing sleeping periods in between. Read 
{% guide_link best-practices/conserving-battery-life %} for more information.


## Contents

{% include guides/contents-group.md group=page.group_data %}