At first i am new to the whole thing i just started last Sunday. Now i have two Raspberries running as Master Slave with a bunch of sensors. We are currently building a house so i will basically build the house around it. One year to go to implement my home assistant setup.
I struggled with setting up the slave, because i had issues with the python dependencies. I thought why on earth is there no command line switch to start as slave. I would suggest --remote IP,PW. This would also close an issue reported with the configuration.yaml link when running in slave configuration.