* Works with many different ultrasonic sensor models: HC-SR04, SRF05,
SRF06, DYP-ME007, JSN-SR04T & Parallax PING)))™.
* Built-in digital filter method ping_median() for easy error correction
(use SONAR_ITERATIONS build flag to configure).
* Allows setting of a maximum distance where pings beyond that distance
are read as no ping or clear (use SONAR_MAX_DISTANCE build flag).
- Integrated Geiger Counter
- Adapted sensor.ino to read and publish values.
- Modified html to add local dose rate into web page.
- Tested with influxDB.
- Tested with MQTT.