About sensors - AndriiArtemenko/UARTSensorsReader GitHub Wiki

The device can take the values from three sensors:

1. Thermometer DS18B20. Designed for reading the values ​​of ambient temperature.
2. Dry contact. (indicated in the circuit as a button) Designed for counting the number of contact closures. In most cases, it uses with mechanical counters.(Like water meter, electric meter, etc).
3. Phototransistor. (indicated in the circuit as button with the opto-coupler) Is used to count the number of flashes. Most often used in conjunction with the counters, that have LED flashes in time with the meter readings.