MQTT issue

[yoch]

I ran this command :

$ modpoll -f cta4.csv --serial /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_B001A5XE-if00-port0 --serial-baud 115200 --serial-parity none -r 2.5 --loglevel ERROR --mqtt-host localhost --mqtt-port 1883

And immediatly got this error :

Modpoll v1.6.0 - A New Command-line Tool for Modbus and MQTT

2026-06-08 15:33:09,702 | E | modpoll.main | Error setting up MQTT input: Client.connect() got an unexpected keyword argument 'clean_session', exiting...

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Here is my pip list (Python 3.11.2) :

$ pip list
Package            Version
------------------ ---------
certifi            2026.5.20
charset-normalizer 3.4.7
idna               3.18
modpoll            1.6.0
paho-mqtt          2.1.0
pip                26.1.2
prettytable        3.17.0
pymodbus           3.9.2
pyserial           3.5
requests           2.34.2
setuptools         82.0.1
urllib3            2.7.0
wcwidth            0.8.1