[jcarrano]

> This control board uses the same microcontroller GPIO pin to both drive segment A of the LED display and sense the door switch.

Is it necessary to be so skimpy with a safety feature?

[akpa1]

Later sections of the article detail how there are multiple different safety features integrated to guard against various different failures triggering the magnetron with the door open.

[seba_dos1]

The post explains how the microcontroller sensing the door switch is not a safety feature.