RaspberryPi Temperature Sensor: Difference between revisions
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==== Install missing packages ==== | ==== Install missing packages ==== | ||
If you have already installed them, you can skip that step. | If you have already installed them, you can skip that step. | ||
apt-get bc | apt-get install bc | ||
apt-get install gnuplot | |||
==== Setup kernel modules for GPIO and 1-wire device ==== | ==== Setup kernel modules for GPIO and 1-wire device ==== | ||
Revision as of 21:47, 19 June 2013
Time to build a temperature sensor with my Pi.
Schematics
Configure the Pi
Update the OS
This not necessary, but generally a good idea.
apt-get update apt-get ugrade
Install missing packages
If you have already installed them, you can skip that step.
apt-get install bc apt-get install gnuplot
Setup kernel modules for GPIO and 1-wire device
modprobe w1-gpio modprobe w1-therm
Check setup
Check whether there is now our sensor device:
cd /sys/bus/w1/devices ls -1
10-000802ad5087[1] w1_bus_master1
See it's content (values):
cd 10-000802ad5087[2] cat w1_slave
Result:
39 00 4b 46 ff ff 03 10 9c : crc=9c YES 39 00 4b 46 ff ff 03 10 9c t=28562[3]
Code
This is how I read the device and generate a nice plot using GNUplot: