onewire-to-mqtt.py

onewire-to-mqtt.py connects to owserver (from owfs) and reads values from 1-Wire sensors. The values aquired from owserver are published using an MQTT broker.

A running owserver and an MQTT broker (e.g: mosquitto) are required to use this daemon.

Usage

A configuration file is the only parameter which has to be passed to the program:

usage: onewire-to-mqtt.py [-h] <config_file>

Reads sensors from owserver and publishes the values to an MQTT broker

positional arguments:
  <config_file>  file with configuration

optional arguments:
  -h, --help     show this help message and exit

Example

 ./onewire-to-mqtt.py myconfig.cfg

Configuration file

A self explanatory sample configuration file is included.

# sample configuration 
 
# MQTT broker related config
[mqtt]
host = 127.0.0.1
port = 1883

# polling interval for sensors
pollinterval = 30

# topic for status messages
statustopic = onewire-to-mqtt/status

# Onewire related config 
[onewire]
host= 127.0.0.1
port = 4304      

[log]
verbose = false
logfile = /var/log/onewire-to-mqtt.log

# list of sensors to be polled and according mqtt topics 
[sensors]
26.C51B8C000000/B1-R1-A/pressure = hhv7/jordkallare/pressure
26.C51B8C000000/humidity = hhv7/jordkallare/humidity
10.F19884010800/temperature = hhv7/jordkallare/temperature

Libraries required

The following libraries are required by onewire-to-mqtt.py

• paho-mqtt (tested with version: 1.3.1)
• owpython (tested with version: 2.9p8)
• setproctitle (tested with version: 1.1.10)

If on a Debian(/Ubuntu/etc) system, install with

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

References

• https://mosquitto.org
• http://owfs.org
• http://owfs.org/index.php?page=owserver