WEBVTT

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Challenge 4 Here's what we know.

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We've restored communication with the payload module, but we still can't operate it.

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The challenge?

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Now teams must restore normal operations of the payload module so we can access the imager.

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Here's how they do it.

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Teams discover that the payload module bootloader has been corrupted, which is why the payload module is not operating normally.

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The teams discover a system console to the payload module and the ability to access the payload module system console by controlling an undocumented GPIO and multiplexer on the CNDH board.

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The teams must write a custom flight software application that can control the GPIO and enable access to the payload system console.

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After writing the application, the teams must upload it to the CNDH and execute it.

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Once the teams have access to the system console, they will identify that it has been corrupted.

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The teams will need to research nominal kubos bootloader configuration and repair the payload module's bootloader to resume proper operation of the payload module.