Stumbled over couple issues. Not sure if first one is due to different compiler. Second one I believe is a misprint in original code as there is no other mentioning of hours or minutes elsewhere:
in radon_eye.h line 65 had to change "std::string" to "String", otherwise got conversion error. With edit appearedt o work just fine.
in simple.ino lines 28-31: changed to below, otherwise cannot find variables.
"
Serial.printf("now %.2f day %.2f month %.2f\n",
radon_sensor.radon_now(),
radon_sensor.radon_day(),
radon_sensor.radon_month());
"
Tried to compile for ESP32-C3 on Arduino 1.18.19
Stumbled over couple issues. Not sure if first one is due to different compiler. Second one I believe is a misprint in original code as there is no other mentioning of hours or minutes elsewhere: