1-Wire® Temperature Monitoring

Background

The Dallas Semiconductor DS18S20 1-Wire Digital Thermometer is a small digital temperature sensor that can be attached to a 1-Wire network. Using a Universal 1-Wire COM Port Adapter, it can be connected to a PC serial port.

Dallas Semiconductor DS18S20

The DS18S20 Digital thermometer provides 9-bit centigrade temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points.

Installing the Software

Brian Lane's Digitemp software was used for this project. To use it you will need to generate a configuration file. The automatically generated one (-a) worked fine for me. Here is an example:

.digitemprc

TTY /dev/ttyS0
READ_TIME 1000
LOG_TYPE 1
LOG_FORMAT "%b %d %H:%M:%S Sensor %s C: %.2C F: %.2F"
CNT_FORMAT "%b %d %H:%M:%S Sensor %s #%n %C"
SENSORS 2
ROM 0 0x10 0x14 0xEB 0x2E 0x00 0x08 0x00 0xC5
ROM 1 0x10 0x3B 0xFA 0x2E 0x00 0x08 0x00 0xE6

Adding Sensors

Weatherproofing

Trend/Graph Output

Here is the current daily (5 minute average) graph of the indoor and outdoor temperature: