boiler-steuerung

Energy costs in the night may be lower than in the day. With this software the boiler heats only during the night to save energy costs. The savings sum up to more than 100€ per year (in our household).

Hardware requirements

• Temperature sensor (e. g. adafruit TMP006)
• RaspberryPi
• min. 3CH Power Relay

Getting started

Copy required configurations and system services

cp -r etc/* /etc
cp -r usr/* /usr
mkdir -p /var/log/temperature

Build the control software

cd BoilerSteuerung
mvn clean package
cp target/boiler-1.jar /home/pi/boiler.jar

Optional: Webserver

mkdir -r /srv/web
cp -r webserver/* /srv/web
cd /srv/web
npm install

Start services

service sensor-ir start
service boiler start
service webserver start

Architecture overview

Measuring the temperature

The TMP006 uses the I2C connectors of the RaspberryPi. /usr/bin/sensor-ir measures the current temperature and stores it in /var/log/temperature/

Control software

The control software reads the current temperatures and heats the water via GPIO pins on RaspberryPi. Those GPIO pins are defined in BoilerControllerGPIOImpl.java

Webserver

The Webserver provides overview about the current water temperature and the heating costs, as well as configuration options. ! ATTENTION ! This webserver is not supposed to be publicly reachable.

Additional energy savings

Disable HDMI on RaspberryPI Add /usr/bin/tvservice -o to /etc/rc.local

Licensing

Apache License 2.0