Sending weewx data to a local serial LCD 4x20

In weewx install csv extension (https://github.com/weewx/weewx/wiki/csv)
In /usr/share/weewx/user modify csv.py with these options:
binding = archive
mode = overwrite
append_datestamp = false

Modify weewx.conf:
[CSV]
    filename = /var/tmp/data.csv
    
Restart weewx

sudo /etc/init.d/weewx stop
sudo /etc/init.d/weewx start