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Installing MQTT-Broker "mosquitto" and WeatherFlow UDP-listener on RaspberryPi running "dietpi"


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I had a few problems to get it right and maybe this post helps others to

NOT make so many mistakes than I did :-( 


I am running the currently latest Dietpi Version 7.3.x

Installing MQTT Broker: "Mosquitto"

log on to your dietpi via ssh.
pyhon3 -V
result : Python 3.7.x
Should be somewhere @ 3.7.x or higher


Install software via "dietpi-software" - search for:
"pip"        - should find package n#130
"influx"    - should find package n#74 = InfluxDB
"mosquitto"    - should find package n#123



I also installed "paho-mqtt" via:
sudo pip3 install paho-mqtt

# if you forget this step - like I did first - the listener will not publish to the MQTT Broker but still works!! WITHOUT any ERROR message
# You will only notice that the when you run listen.py from the command prompt that the line: 

# "publishing to" will be missing 

# It took me a while to figure this out


Next I changed the "mosquitto.conf" file located in

I installed Midnight Commander via dietpi-software and started "mc" from here
Then opened "mosquitto.conf" for editing via "Edit F4"
and added a line:
allow_anonymous true
# obviously to allow connection without user & password
and changed the listener line to:
listener 1833 
#otherwise mosquitto starts in "local ONLY"mode


I then restarted the mosquitto server:
systemctrl restart mosquitt.service
and checked
systemctrl status mosquitto service


I then changed directory to:
cd /usr/local/bin/

Create a new text file via:
touch listen.py    - or by any other means

Then go to:

Please login or register to see this link.

click on "listen.py" and then on "raw" 
"ctrl-a" > ctrl-c" - copy


I then started "mc" and opened "listen.py" for editing and pasted the content from the above
via "shift-ctrl-v" then quit via F10 and save the file.


Then I started:
python3 /usr/local/bin/listen.py -b -m -d
This should produce some output like:
rapid_wind     =>  ts  = 1624942363 mps = 2.07 dir = 131
publishing to mqtt://


I then edited the dietpi "custom.sh" file @ 

and added the line
nohup python3 /usr/local/bin/listen.py -b -m


I then run dietpi-config and changed Autostart options to n#14: Custom        
This should start the listener.py automatically after a reboot.    


NI then checked that the MQTT Broker "mosquitto" is running and reachable!
I use "MQTT Explorer" which is free and available for all major plattforms:
Can be found here:

Please login or register to see this link.


Install on any machine on your network.

When you are connected to your MQTT server you should find the topi "wf"
and now all should be good to go and run the QuickApp :-)


You might also want to publish to InfluxDB for later use with grafana or so

by adding the options to the listen.py command line.
for options look at:

Please login or register to see this link.


....and last but not least again thanks to:

vinceskahan for the brilliant "listener"  -- THANKS

afendikov for providing the QuickApp  -- THANKS 


Bodyart @ for providing an alternate way of reading out the WeatherFlow data

..and of course anybody else I might have forgotten to mention here.


THANK you very much 




PS: Please report if you spot anything wrong here! 

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