Iím currently working on a project for integrating GMC Geiger devices and with Samsung SmartThings.
We can be able to create automations based on measured radiation levels, for example if the equivalent dose is above 0,50 uSv/h, blink the lights or get and audio notification for warnings.
The Smartapp will perform a web request every 1 or 5 minutes and then update the DHT accordingly.
The code (SmartApp & Custom DHT) will be available online within the upcoming days via github. (No ETA yet)
Devices Supported: Any device that can store data to Geiger Counter Wold Map service (Typically every device with built-in WiFi)
Here is a screenshot of GMC500+ data presenting on the SmartThings App (iOS)