A-GM Manager
Web application for long-term monitoring of radioactivity levels
...It includes an open-source Web application (A-GM Manager) running on a SOHO server (e.g. NAS from QNAP for Small Office Home Office servers) connected to a Geiger-Muller radioactivity counter device such as C-GM Counters (https://sourceforge.net/p/c-gm-counter) or compatible counters from GQ Electronics LLC. Other compatible or DIY Geiger-Muller counters could also be used.