This free project was designed to measure and control temperature in the range of - 55°C to +125°C with 0.1°C 
accuracy. It is based on the popular PIC16F628A microcontroller of Microchip. The microcontroller uses the 1-Wire protocol ( sometimes known as a MicroLAN ) to communicate with a DS18B20 digital thermometer and a DS2405 addressable switch. The 1-Wire bus requires only one data line (and ground) for communication with a central microprocessor .
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