the ethernet port is not supported yet; we have in pipeline this new feature in one of our future updates (that may take time).
For now, we’re working hard to improve all Zerynth ecosystem (release 2.1.0) to give you a better UX and new functionalities.
the eth.py in standard library in an abstraction layer (same as wireless/wifi.py) to make agnostic the ethernet usage from the low-level driver (more info here).
For now, the only low-level ethernet driver available in zerynth is the ESP32 ethernet driver.
Soon it will be available also for the STM32F429ZI.
Stay tuned for updates