DS18B20 Waterproof Digital Temperature sensor with 1m cable 1-wire Dallas Maxim

Regular price £4.00

The DS18B20 waterproof digital thermometer provides 9-bit to 12-bit Celsius temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points.

The DS18B20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. In addition, the DS18B20 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply.

Each DS18B20 has a unique 64-bit serial code, which allows multiple DS18B20s to function on the same 1-Wire bus. Thus, it is simple to use one microprocessor to control many DS18B20s distributed over a large area.

Connect a 4.7k resistor across pins 2 & 3 to pull-up the data line.

DS18B20 usage with Raspberry Pi

DS18B20 usage with Arduino 

Data Sheet