After a number of months of continuous operation the Pi Zero 2 Wh running my Vibration Monitor Software dropped offline.

I expected it to come back after power cycling it - it didn't. I then suspected that the MicroSD card had an issue - it wasn't. Flaky power supply? No. Pi killed by the heat? The Tucson summer can be very warm, but not the problem. Bad luck? Not really...

One of the things I love about occasionally trying small Raspberry Pi Projects is that I'm always learning new things! In this case, lacking hardware/sensor experience, I hadn't considered the impact of moisture on the wiring and the vibration sensor. Everything you see from the sensor is quite dry, but even in the desert the buried plastic box this sensor was in has condensation and moisture.

In the short term I just replaced hardware - but now on the todo list is protecting the sensors and doing different wiring that will hopefully let this system live a longer life...

PS - I replaced the Pi Zero 2 Wh with a Pi 3 A+ - I was absolutely blown away by the size of the Pi Zero 2 Wh when I got it - it is certainly the smallest hardware I have ever run C#/.NET code on!! But over time I found the 2.4GHz only Wifi and lack of a full-sized HDMI port (ie easy connection to the monitors I own) were too much of a downside - for me the Pi 3 A+ remains a sweet spot in the Pi line.