# 1-wire thermal sensor

<abstract>
The DS18B20 digital thermometer provides 9-bit to 12-bit Celsius temperature measurements. 
It communicates over a 1-Wire bus that by definition requires only one data line (and ground) 
for communication with a central microprocessor. It has an operating temperature range of 
-55&deg;C to +125&deg;C and is accurate to &plusmn;0.5&deg;C over the range of -10&deg;C to 
+85&deg;C. 
</abstract>

* [DS18B20 - Programmable Resolution 1-Wire Digital Thermometer](http://www.maxim-ic.com/quick_view2.cfm?qv_pk=2812)
* [How to read this sensor](/1wire)

<img src="ariag25_DS18B20_wiring.jpg">  

Lines used as 1-wire bus:

| Aria pins | Signals |
|-----------|-------------|
| S1  | 3V3 |
| S2  | 1-wire data |
| S24 | GND |