Upload data from Fronius Solar Inverter with Fronius Smart Meter to PVOutput.org

Added Fronius Smart Meter support to a script originally authored by Terence Eden. https://shkspr.mobi/blog/2014/11/fronius-and-pvoutput/

19/02/2017 Voltage value taken from smart meter when the inverter is not producing power. thus giving voltage graph for 24 hours instead of just when the inverter was producing power.

[root@server ~]# chmod +x /usr/local/sbin/fronius.php

[root@server ~]# vi /etc/crontab

*/5 * * * * root php /usr/local/sbin/fronius.php