ArduPilot

How to Fix: PreArm: Hardware safety switch

Solved: 'PreArm: Hardware safety switch' in ArduPilot and Mission Planner. Step-by-step fix and parameter settings.

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Error

PreArm: Hardware safety switch

Solution

Press and hold the physical safety button on GPS module until solid red.

Need the latest Mission Planner?

Many PreArm bugs are fixed in the latest version.

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