GardenaValveControl

A simple control unit that allows to switch Gardena 9V Valves

This project builds a controler (which serves as a substitute for e.g. the Gardena C14e) to interface up to two 9V-valves. It can be connected to a Raspberry Pi and integrated with OpenHAB or other home automation solutions via a REST based interface.

Setup

For python2

sudo apt-get install python-dev python-rpi.gpio
python -m pip install -r requirements.txt

For python3

sudo apt-get install python3-dev python3-rpi.gpio
python3 -m pip install -r requirements.txt

Autostart @ RasperryPi

For autostart add the following line to /etc/rc.local:

/bin/sleep 15 && screen -dmS Gardena bash -c "python3 /home/pi/GardenaValveCtrl/gardena_rest.py" &

OpenHAB Item

In /etc/openhab2/items/default.items the watering service can be accessed by, e.g. adding the following line (which has to be adapted your specific configuration):

Switch Gardena "Gardena Bewässerung" (gOutside) [ "Switchable" ] { http=">[ON:GET:http://gardena.local/open] >[OFF:GET:http://kitchen.local:4999/close]" }
String Gardena_Status           "Gardena Status [%s]"           <flow>          (gOutside)                              { http="<[http://gardena.local/status:10000:JSONPATH($[0].status)]" }

With the upgrade to OpenHab3, the http1-Binding is deprecated. The HTTP Bindung V2 is used instead. The following has to be added to a things file:

Thing http:url:gardena "Gardena" [ baseURL="http://192.168.0.4:4999/", commandMethod="GET", refresh="2" ] {
        Channels:
                Type switch : switch [ commandExtension="%2$s",  onValue="open", offValue="close" ]
                Type string : status [ stateExtension="status", stateTransformation="JSONPATH:$[0].status" ]
}

The following has to be added to an items file:

Switch Gardena                  "Gardena Bewässerung"           <faucet>        (gOutside)      [ "Switchable" ]        { channel="http:url:gardena:switch" }
String Gardena_Status           "Gardena Status [%s]"           <flow>          (gOutside)                              { channel="http:url:gardena:status" }

By using OpenHab together with the Hue Binding, also Amazon Alexa can be used to control the watering service.

Watering WebService Status Page

The status page either shows closed and allows to switch on

Gardena Valve Status

Valve 1 is currently closed (turn on)

or shows opened and allows to switch off

Gardena Valve Status

Valve 1 is currently opened (turn off)

Circuit Configuration/Layout

You can find further information on the project @Fritzing.