David Sidrane 6eff7deb7e Extend the delay ensure post reset pulse delayed.
Given the original poster's comment that "It happens very consistently for us." I suspect the motor spin observed in https://github.com/PX4/Firmware/issues/7457 is not caused by the original issue of slow decay on the PWM pins at reset, but the post reset pulse of 3.1 Ms arriving in a window that the ESC considers it valid.

The results from testing, indicated that the if the PWM pins were clamped low for > 300 Ms, prior to reset the motors did not spin. This would delay the the post reset pulse of 3.1 Ms out by > 300 Ms. 

This change delays the reset and therefore the pulse by at least 400 Ms.
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PX4 Pro Drone Autopilot

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Gitter

This repository holds the PX4 Pro flight control solution for drones, with the main applications located in the src/modules directory. It also contains the PX4 Drone Middleware Platform, which provides drivers and middleware to run drones.

Please refer to the user documentation and user forum for flying drones with the PX4 flight stack.

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The PX4 Dev Team syncs up on a weekly dev call.

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Supported Hardware

This repository contains code supporting these boards:

Project Milestones

The PX4 software and Pixhawk hardware (which has been designed for it) has been created in 2011 by Lorenz Meier.

Description
a mirror of official PX4-Autopilot
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