OH2 Modbus Binding: How to connect to a Modbus Master

[peaeater (Gerstl)]

is solved see

HowTo: Connect a Modbus Master to OpenHAB via RestAPI (Example tested with an TA CMI Device)

I started with the question: How to connect my gas heating system, which is driven by a Controller from Technische Alternative, to my OpenHAB server. I tried to understand the former TA_CMI Binding. But it looks like that there is no development any more. That binding used CoE (CanOverEthernet) as an protocol. During the time I was searching for a solution, my CMI got an update and was suddenly capable to speak modbus. So I started immediately with my first connection tries an I learned ve…