Yaay! Finally figured out why I couldn't access one particular machine over a bridged wireguard tunnel. I turned out that the machine had a borked routing table, which allowed it to talk to devices on the same switch but not over routed connections. It's a terrible old embedded system, so adding some route commands at the end of rcS seemed the fastest way to patch things up.
Need to probe your Raspberry Pi Compute Module-based motherboard? So did we, so we made a probe for it: https://shop-nl.blinkinlabs.com/products/raspberry-pi-compute-module-4-test-card
Anyone know why the cache browser in Firefox will give you a full hex dump of the files in it, but won't reconstruct the file for you? In this case I'd forgotten to save a screenshot from my oscilloscope before closing the browser tab. Seems odd, like they're trying to make just a small deterrent to snooping on likely sensitive data?
I needed a way to probe the signals on an LCD cable but couldn't find a breakout board for it, so we made one! In case you find yourself in a similar situation: https://shop-nl.blinkinlabs.com/products/flat-flex-cable-ffc-interposer