Our Komfovent balanced ventilation system is pretty bad at accurate timekeeping — the time drifts several minutes over the course of a few months. This is a bit annoying as the operator panel is prominently located on the second floor, and we use it to tell time.

Luckily; the time can be set using the Modbus interface.

We recently got balanced ventilation installed, and discovered that our ventilation unit has Modbus TCP/IP support. I even found a thread on the Home Assistant community talking about interfacing the C6 controller, which our unit has, into Home Assistant 😃

Here is my implementation 👇