Project Gizmo NodeMCU/ESP8266-based Geiger counter used to detect background beta/gamma radiation at home. Built & programmed by Christopher David Elison.
Monitor for radioactive radiation based on STS-6 (CTC-6) Geiger tube. Sensitive to gamma and hard beta. Transmission every 60 seconds. Dose rate is estimated from pulse rate with fixed factor. Normal level is just below 0.1 µS/h.