Devices on RS 232
GC-100-06
The GC-100-06 network adapter combines three IR ports and one RS-232 port in a single Ethernet-connected box. It is the entry point of the GC-100 range that Home Assistant's itach and gc100 integrations are written against, and it is still the unit found in a great many existing AV racks.
GC-100-12
The GC-100-12 network adapter carries six IR ports, two RS-232 ports, and three relays in one Ethernet box. It is the Global Caché unit Home Assistant's gc100 integration is documented against, and the one that covers a whole rack of IR gear plus dry-contact loads from a single IP address.
iTach Flex FLEX-IP
The iTach Flex FLEX-IP is a single wired gateway whose function is set by the cable you plug into it: IR, RS-232, RS-485, or relay and sensor. It speaks the same TCP API as the iTach and GC-100, so with an IR cable fitted Home Assistant drives it through the itach remote platform.
iTach Flex FLEX-WF
The iTach Flex FLEX-WF is the Wi-Fi version of the Flex gateway, a gum-pack-sized endpoint whose role is set by the Flex Link cable fitted to it. With an IR cable it answers Home Assistant's itach remote platform; with the relay and sensor cable it answers the gc100 platforms.
iTach IP2SL
The iTach IP2SL puts a single RS-232 device on a wired network, exposing its serial port as a raw TCP socket on port 4999. Home Assistant has no Global Caché serial integration, so it reaches the port through whichever integration already speaks that device's protocol over a socket.
iTach WF2SL
The iTach WF2SL is the Wi-Fi version of the IP2SL RS-232 gateway, bridging one serial device onto the network without a cable run. It carries the same DB9 port and the same TCP socket on port 4999, and the same Home Assistant caveat: there is no Global Caché serial integration.