tbspace.de

In order to log the performance of our solar system at work in a Munin graph, this library was developed for reading SMA Tripower solar inverters. These solar inverters have an Ethernet interface and use an industry standard protocol called "ModBus".

Manawyrm/SMAPHPConnect on GitHub

The existing ModBus implementation for PHP had to be modified a bit for this, because the inverters in TCP query mode start a new TCP packet after the ModBus header and thus bring the original ModBus implementation out of sync. My patched version of the library can also be found on GitHub.