Update: The ModemManager rule should really only apply to the USB device, not the TTY. I updated the rule below to be a bit more specific. Around the end of July, I ordered a Bus Pirate from Seeed Studio. It took about a week to ship, which is pretty quick, I think. I picked it up from the post office on Tuesday. After opening the package and plugging it in, I was greeted with nice blinky lights, and my computer didn’t start smoking, so that was a good sign.