Teensy 4.1 Ethernet problem

[Serhii]

Hi everyone!

My Teensy 4.1 is connected to a pcb that has ethernet port. But I can't get connection. It looks that Teensy works fine through a serial port(USB) but when I trying to connect with an ethernet cable no
other devices can see the board(tried with a bunch of computers and router). I blame myself that I fried something while soldering.

Can anyone give me a hint how to check ethernet on Teensy? I have DMM and an oscyloscope. Any information is highly valuable! Thank you for your time!

[ZigmundRat]

You have to include the Ethernet support in your project of course. This varies by the environment used (PlatformIO,CircuitPython,etc). But until you do this you won’t have a MAC address, much less an IP address. What have you done to enable Ethernet on the software side?