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(hardware) Use of TIG welder near a doorbot reader cable run can fake a doorbell input #67

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zymurgic opened this issue Jul 23, 2019 · 0 comments
Open

(hardware) Use of TIG welder near a doorbot reader cable run can fake a doorbell input #67

zymurgic opened this issue Jul 23, 2019 · 0 comments
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hardware Issue with hardware

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@zymurgic
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Use of a TIG welder (other spark gap transmitters are available) in the vicinity of a doorbot reader cable can induce sufficient negative current in the input to trigger a doorbell notification.
Doorbell / button input is PF_1 on the Launchpad / White/Blue on the CAT5 / pin5, and is normally open, pulled to ground when pushed.

This may affect all microcontroller inputs, and may also be the cause of reported acnode crashes.

Investigate methods of input protection to attempt to prevent this.
@zymurgic zymurgic added the hardware Issue with hardware label Jul 23, 2019
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