Temperature Sensors
DS1820 IC is used to sense the temperature, they can communicate with the microcontroller through 1 wire. You can connect as many DS1820 on the single wire since each sensors can be accessed by the unique address on it. The DS1820 has the following features.Unique 1-Wire Interface Requires
- Only One Port Pin for Communication
- Each Device has a Unique 64-Bit Serial Code Stored in an On-Board ROM
- Requires No External Components
- Can Be Powered From Data Line. Power Supply Range is 3.0V to 5.5V
- Measures Temperatures from -55°C to +125°C (-67°F to +257°F)
- ±0.5°C Accuracy from -10°C to +85°C
- 9-Bit Thermometer Resolution
- Converts Temperature in 750ms (max)
Bluehome has 2 sensors, in which one sense the indoor temperature and other sense the outdoor temperature.