guardianproject/haven

Implement a low power mode

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#36 opened on Aug 14, 2017

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enhancementhelp wantedhigh-priority

Description

Implement a "low power mode"uses camera and other high power sensor more efficiently, by triggering them from low power sensors

sound + light sensor -> trigger camera activate and/or video recording

light, motion -> trigger one minute of active camera motion detection -> trigger one minute video recording

Contributor guide

Tech stack
androidjava
Domain
mobileperformance
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
over 1 week
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
needs investigation
Prerequisites
Android developmentSensor frameworkPower management
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
25
Research direction
Study the existing sensor usage in the Haven app, particularly how the camera and motion sensors are currently triggered. Review Android's SensorManager and PowerManager APIs to understand low power sensor batching and wake up triggers. Look for any existing power saving patterns in the codebase, such as Doze mode handling. Then design a proposal that uses sound and light sensors as low power triggers for the camera, ensuring minimal battery drain. There are no comments or linked PRs, so the approach is open for discussion.