In order to accomplish this, [Bas] is using a light-dependent resistor and a pull-up resistor to create a resistance bridge, which is then connected to an analog input pin on a Raspberry Pi Pico.

Yes, in less than 1/4 of one second an Arduino can open any of the millions of these locks in service. The exploit in Onity programmable keycard locks was revealed by [Cody Brocious] at the ...