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This is a simple case for a matrix keypad connected to a ESP-WROOM-32 (30 pin). Parts held in with M2.5 screws and M3 screws for the bottom plate. I printed in PETG, but PLA would be fine too.

Matrix keypad - https://www.amazon.com/gp/product/B086ZGKDK9
ESP-WROOM-32 - https://www.amazon.com/gp/product/B0B9G74NNM/
M2.5 Screws - https://www.amazon.com/gp/product/B0B3J58MMW
M3 Screws - https://www.amazon.com/gp/product/B0CCPH974T (only if you want the bottom plate in the v2 model)

If you want to make your own modifications to this I've included the OpenSCAD files.

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