ArduPilot/ardupilot

AP_Notify: Create automatic audible lost/crashed vehicle alarm

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#13,194 opened on Jan 7, 2020

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AllVehiclesLibrarySafetygood first issue

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Description

Feature request

Is your feature request related to a problem? Please describe. When a vehicle crashes or is otherwise lost, it can be difficult to find it if you cannot see it. If you do not have and RC connection, you cannot activate the lost vehicle alarm. The lost vehicle alarm can only be activated by stick gesture or aux switch. If you do not have a GCS connection and GPS, you cannot see its coordinates.

Describe the solution you'd like

  • Lost vehicle alarm sound activate and stay activated when the RC and GCS are lost
  • Lost vehicle alarm sound activate and stay activated on crash detection
  • Change the lost vehicle alarm sound to something more unique, such as the sound of an ELT
  • Change RGB lights to flash as bright white as possible and remain flashing after crash detection

Describe alternatives you've considered Pop smoke and launch flares. But probably not practical at this time :)

Platform [X] All [ ] AntennaTracker [ ] Copter [ ] Plane [ ] Rover [ ] Submarine

Contributor guide

Research direction
Examine AP Notify files (e.g., AP Notify.cpp/h) to understand the lost vehicle alarm implementation. Identify where RC loss and GCS loss are detected. Add conditions to activate alarm on both losses and after crash detection. Modify the alarm sound and RGB LED behavior accordingly.
Tech stack
c
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C++ArduPilot build system
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60