Wed Mar 13, 2013 1:44 pm
More detailed info. needed ...
What is "an ethernet relay board with RJ45 port"? (I can think of at least two interpretations of that phrase - probably both "wrong"

) IE. Make, model no. ...
Does the ethernet port on the Pi work O.K. when connected to a LAN port on your router (if you have one) or to another computer (laptop, netbook)? NB: WiFi not in use at the same time.
Trev.
Still running Raspbian Jessie or Stretch on some older Pi's (an A, B1, 2xB2, B+, P2B, 3xP0, P0W, 2xP3A+, P3B+, P3B, B+, and a A+) but Buster on the P4B's. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm