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Re:Flipper Zero Geiger Counter by defrost on Friday September 19, 2025 @12:01AM (#45297815)
You might be interested in RadiaCode (full gamma spectrum) and RadiaCode Python Library - https://www.radiacode.com/ and https://github.com/cdump/radiacode

For Radon detection options are

* direct alpha detection via wet film + process (slow, and day turnover physical processing) OR optical scintillation of filtered air, or

* stochastic gamma detection via a full spectrum and a formula to identify and divide out main peaks and daughter peaks of overlapping common radiometric decay (Uranium, Potassium, Thorium) to guesstimate the radon

Re:Flipper Zero Geiger Counter by peddling-brink on Wednesday September 24, 2025 @11:06PM (#45368859)
I did this with radiacode and that library. I had chatgpt put together a quick little server that pushes from cdump/radiacode into MQTT for home assistant. I'd be happy to release it if there's interest.