2022-12-29 New hardware device to play with: Corinex HD200 CableLAN Wall Mount Adapter CXC-HD200-WMEe
My enthusiast stories about getting uart access on the previous cable router devices are causing more hardware to come my way to play with. This time two Corinex HD200 CableLAN Wall Mount Adapter CXC-HD200-WMEe units showed up. They are compact interfaces for ethernet-over-cable according to Corinex standards. The size and the status leds remind me a lot of devolo powerline units which I used years ago to get network in our garden shed. After voiding the warranty by breaking the sticker and unscrewing the two screws the case doesn't want to open yet. Some force is needed, plastic tabs in the corners kept it closed. I notice there is one very compact board with everything including the power supply. There is a clear demarcation on the board between the power supply area and the rest with slits in the board on parts of this line. Two other screws hold the board to the case and after removing those I can take it out. There are wires from the board to the power plug and a coax cable to the F connector for the coax cable. There is probably a main system on a chip (SoC) but it's hiding under a heatsink. Most components are surface mount devices (SMD). On the other side of the board I see a RTL8201EN ethernet chip near the RJ45 network connector. And an EM638165TS-6IG chip which turns out to be 64 Mbit of Synchronous DRAM. And a 25L3206E, 32 Mbit serial flash. For now I have no idea if this device has a UART somewhere. The only row of 4 small soldering pads didn't give me continuity to any part that I thought would be at the electric ground level so no idea whether that is the UART or not. Although there are two units they don't want to talk to each other over a coax cable with F connectors. The manuals I can find state clearly that they want to see a Corinex Ethernet over cable master device. The person that gave them to me has experience with these devices and their implementation of the standards and stated to me Corinex ethernet over cable devices only talk to Corinex ethernet over cable masters.