onewireToMqtt.py

onewireToMqtt.py is intended to run as a service, it connects to [owserver] and pushes the defined devices to MQTT

A running owserver and a mqtt-broker (e.g: mosquitto) are required to use this deamon.

Usage

• install a broker like mosquitto

apt-get install mosquitto mosquitto-clients

• install software

apt-get install python-ow python-pip python-enum
pip install paho-mqtt

cd /usr/local/src

git clone https://github.com/dawys/onewire-to-mqtt onewireToMqtt

cd onewireToMqtt

cp config.xml.sample config.xml

cp onewire-to-mqtt.service /etc/systemd/system/

systemctl enable onewire-to-mqtt.service

vi config.xml

systemctl start onewire-to-mqtt.service

• edit config to your needs

<mqtt>
  <hostname>localhost</hostname>
  <port>1883</port>
  <username>username</username>
  <password>password</password>
</mqtt>

<onewire>
  <hostname>localhost</hostname>
  <port>4304</port>
</onewire>

• map your onewire devices to topics

<mqtt>
  <topics>
    <topic id="28.53111A000000" property="PIO.0" type="ON_OFF">heating/requestSwitch</topic>
    <topic id="21.00CDA0050000" property="temperature" type="FLOAT">heating/returnTemperature</topic>
    <topic id="15.A10066000000" property="counter.A" type="INTEGER">basement/totalElectricMeterPuls</topic>
  </topics>
</mqtt>

• if you want init some devices with defined values on startup

<onewire>
  <init>
    <device id="simultaneous" property="temperature">1</device>
    <device id="21.46A781000003" property="power">1</device>
  </init>
</onewire>

Example

check if it is working

mosquitto_sub -h localhost -u username -P password -v -t '#'

onewire/get/heating/requestSwitch ON
onewire/get/heating/returnTemperature 23.55
onewire/get/basement/totalElectricMeterPuls 5436

if you want to set values

mosquitto_pub -h localhost -u username -P password -t onewire/set/heating/requestSwitch -m OFF
mosquitto_pub -h localhost -u username -P password -t onewire/set/heating/returnTemperature -m 22.5
mosquitto_pub -h localhost -u username -P password -t onewire/set/basement/totalElectricMeterPuls -m 54355

if you want to init all devices

mosquitto_pub -h localhost -u username -P password -t onewire/set/init -m true

if you are usinf openHAB2 to read and write values

• install binding mqtt and edit services/mqtt.cfg
• define items

Item itemHeatingRequestSwitch {mqtt=">[broker:onewire/set/heating/requestSwitch:*:default], <[broker:onewire/get/heating/requestSwitch:*:default]", autoupdate="true"}
Item itemHeatingReturnTemperature {mqtt="<[broker:onewire/get/heating/requestSwitch:*:default]"}

Configuration file

a self explaining sample configuration file is included copy config.xml.sample to config.xml

Libs required

the following libraries are required by onewireToMqtt.py

• python-ow
• python-pip
• python-enum
• paho-mqtt

install with

apt-get install python-ow python-pip python-enum
pip install paho-mqtt