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A comment on There's an ARM Cortex-M4 with Bluetooth inside a Covid test kit. Parent comment

Re:There's an ARM Cortex-M4 with Bluetooth inside a Covid te... by LeoPanthera on Monday December 27, 2021 @01:34AM (#29700047)
The use case is valid but the solution is completely overkill.

You could do this with an analogue circuit and two LEDs.

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