I have a Phicomm Ke2P router that I was using for 3-4 years. It is pretty old but it was never bottlenecking for my needs. Until now. I found a bug in its stock firmware so every time I set up port forwarding. My router cuts of the internet if I'm using custom DNS (more discussed here) .I don't want to buy a new souter, since I like the design and functionality of the current one. It has a slim aluminium body and only one RGB LED that can be turned off.
So I bought TTL to USB converter, soldered pins TX RD and GRD to its serial connector, connected it annnd I've got nothing at the output. I thought that I made a bad job soldering the pins, but that was not the case. The only thing I can do to get any output at all is to connect TX to RX and vice versa. And even then it is just unreadable junk of random characters.
I thought that maybe my TTL converter is broken so I decided to test it. I have connected it to a USB I left its pins unplugged. Tried to type into the console and nothing happened, as I was expecting. After that, I shorted the RX and TX pins and tried again, now with the output what was pretty good evidence that it is indeed working. It has to be something with a router, or connection, but I was able to find almost 0 documentation about this problem so that's why I'm here. It is my last hope before buying a new router.. Can someone guess why is this behaving like that?
Sorry if there are any grammar errors, I am not a native speaker.