Selection of transmitted topics

[btmerz]

As I don't need most sended topics in my home automatisation, it would be helpful to select the sended Topics.
In my example, I only need 1-0:1.8.0/255 and 1-0:16.7.0/255. Would it be possible to activate the topics in the Config.h file anyhow. This would help to reduce unnecessary traffic.

By the way, I added the lines
if (scaler<0) {
scaler -=3; //wandelt Werte von Wh in kWh um
prec=3;
}

at line 103 of MQTTPublisher.h to convert the values from Wh to kWh.

Thanks for your support and this very helpful project.

Bernd