rpi-temperature
About
This repository contains the scripts required to:
- Measure air temperature using a Raspberry Pi
- Store the measurements taken in a Round-Robin Database
- Create a graphical representation of the data stored
- Create an ultra simple webpage to display the graphs
Specifications
Raspberry Pi model: B+
Sensor model: DS18B20 (waterproof)
Kernel release: 4.1.19+ (Raspbian)
RRDtool version: 1.4.7
The graphs will be of PNG file format
Installation
Install RRDtool and a web server (i.e. Apache):
apt-get install rrdtool apache2
Download and save temp-sensor.sh and temp-graph.sh
in /root/bin/ for example.
Edit the following line found in function read_raw_data
(temp-sensor.sh)
RAW_DATA=$(cat /sys/bus/w1/devices/28-04146dd116ff/w1_slave)
replacing 28-04146dd116ff with the number corresponding
to your device. Then add the two shell scripts as cron jobs
by executing:
crontab -e
and adding the following two lines:
@reboot /root/bin/temp-sensor.sh
* * * * * /root/bin/temp-graph.sh > /dev/null 2>&1
Save and exit!
Images
Webpage
Sample graph (2 Hour Temperature Log)
Sample graph (4 Hour Temperature Log)
Sample graph (12 Hour Temperature Log)
