Fridge Alert

A few years ago I had issues with an older fridge/freezer – the problem was the freezer door would sometimes pop open when the main fridge door was closed. This would frequently not be noticed, and much later we’d discover a lot of icy food. I put together an alarm using an arduino with some various bits of code I'd hacked together, and it's worked really well. Recently I found our backup 'party' freezer was having a similar issue, so I made another and thought that this time I'd document it!