I’d had some difficulty with WiFi consistently staying connected on each of my Raspberry Pi units.  I’d had a little time to look into it, but no research had offered an answer and the only fixes I’d come up with was a shell script I wrote to force a restart of the NIC, which helped some, but no improvement when I added an antenna, (I considered all the wires, sensors, etc. might be interfering with the signal.) Finally this weekend, started to dig around and noted that although in the user interface, it showed both connections to my home WiFi and…