solved…

uninstalled python 3.7.2 x86
installed python 3.5.2 x86

work fine, plugin was loaded

conclusion: domoticz (in windows10) is NOT COMPATIBLE with python 3.7.2

thanks for your suggestions

python was installed correctly, with same options as described in domoticz manual i have now modified the properties of desktop domoticz icon (added underlined part) : "C:\Program Files (x86)\Domoticz\domoticz.exe" -www 8080 -sslwww 443 -log D:\domoticz.log -logvevel 0 -verbose 1 startup result in ...

strange behaviour: - starting domoticz directly from c:\program files(x86)\domoticz il work (without new plugin) - with new plugin it works but new hardware is not present - starting domoticz with desktop icon don't work (domoticz offline) - link parameters say: "C:\Program Files (x86)\Domoticz ...

uninstalled python 64 bit
domoticz (without new plugin) work

installed python X86

domoticz (without new plugin) don't work - it say: DOMOTICZ OFFLINE
...

hi i am using domoticz 4.97 installed on windows 10. now i am trying use a plugin (downloaded) named MQTT Discovery. my installation directory is C:\Program Files (x86)\Domoticz\ but folder plugins does not exists. i had make it manually. here i put a new folder "mqtt_discovery" containing file ...