Gernerate random circuits to measure with multimeter
Use analog switches driven from the MCU -- e.g. CD4066 - https://www.ti.com/lit/ds/symlink/cd4066b.pdf?ts=1594252952793&amp;ref_url=https%253A%252F%252Fwww.google.com%252F
Each package has 4 switches, so you'll need a few packages. The switch resistance will be low enough for the continuity tester to think is a short.