Configuration

Location

You can find the configuration file to /etc/MqttOwfs.conf.

To specify another folder or configuration file see daemon settings on How to install.

Sample of configuration file

[owfs]
server=127.0.0.1
port=4304
devicesinterval=5
valuesinterval=4
temperaturescale=C
pressurescale=Mbar
uncachedread=false

[mqtt]
server=tcp://127.0.0.1:1883
keepalive=300
topic=owfs

[log]
level=1
destination=cerr

[0589454659845/temperature9]
displayname = TemperatureSalon
round = 1

[0100A5DA59845/ispresent]
displayname = door
refreshinterval = 1
uncachedread = true

owfs section

• server to define owfs server ip address (default 127.0.0.1).
• port to define owfs server port TCP (default 4304).
• devicesinterval specify interval to refresh devices list, in second (default 90)
• valuesinterval specify interval to refresh devices value, in second (default 10)
• temperaturescale (default C)
• pressurescale (default Mbar)
• uncachedread (default false)

mqtt section

• server to define mqtt server url (default tcp://127.0.0.1:1883)
• topic specify the topic (default owfs)
• keepalive specify keepalive, in second (default 300)

More options in wiki of mqtt daemon library here.

log section

• level to define log level, 1 to 7 (default 1)
• destination to specifie log destination cout, cerr, clog or a file (default cerr)

More options in wiki of mqtt daemon library here.

Comments

To comment a line don't use character # but character ;

Others sections

Other sections allow you to manually define devices. The name of the section must be the folder to read the owfs device value.

• displayname to modify the device name in the mqtt topic
• round to round the value (1 to round to one decimal place)
• refreshinterval to specify a specific refresh value interval (by default valueinterval in owfs section)
• uncachedread set to true to read uncached value (by default value of uncachedread in owfs section)

Example of section to have a mqtt message for a DS2438, VDD value :

[26000026D90000/VDD]
displayname = MyDS2438voltage
round = 1

There is specific folder to know if a device is online on the one wire bus : /ispresent. It's not use present folder of owfs because it's deprecated. This feature rescan one wire.

Example of section to have a mqtt message to know if a DS2401 is online :

[0100A5DA59845/ispresent]
displayname = door
refreshinterval = 2
uncachedread = true