I initially started with one RS4D, which I installed with no problems, worked right away.
I received from a friend and old Johnson-Matheson Model 6480, so I then purchased a RJam board (R3EA1) which I installed on a Raspberry Pie 3 model B+. That also worked right away, but it never connected to the server (station offline). When I used SWARM, I could see one or the other, but could not see them both at the same time. I then tried to get both of those Raspberry Pies to have static addresses, using the web interface of the Shake. That was probably a mistake, since after that nothing worked anymore. I could still access the Raspberry Shakes using SSH, but they would not connect to the server (neither of them) and could not access them through SWARM either. I then went into the /etc/dhcpcd.conf file and fixed the routing table manually. Now, I am back to square one, where they both work, but only R9E10 can connect to the server, not R3EA1; but now I can’t access to neither of them with SWARM. Also, even though R9E10 is connected to the server, it still shows that it is “offline”, so I can’t access its data with the phone app. By the way, I can ping the Raspberry Shake server with both units.
I will admit I am very new at this Raspberry thing, but I have worked with computers (Windows, Unix, Linux) for several decades.