A train has to be in automatic mode, and stopped at the station. Then, you can read the content of the cargo by connecting the train station (red or green) to any entity. I hope it helps
I'm having the same problem, I'm meeting the conditions automatic and stopped at a train station but it's not feeding any signals out I was using some Bob's logistics trains but I switched back to vanilla trains and it still isn't working. Any Ideas?
I had the same issue and solved it, but I need to update it on the server. I don't have internet for now (at home!), so you will have to be patient. Very sorry for that.