yes, you can use processing to interact with external hardware devices. processing provides libraries that allow you to communicate with various hardware components such as sensors, motors, and arduino boards.
I tried 3 different routers, I tried to set fixed IP, I tried to run on version 4.0 of ESP-IDF, I tried to use the arduino IDE, I tried to use external power supply and all this without result. I just needed to try another LAN7820, because I don't have another one. Sketch: `...
positively, without doubt, must have more than the 500mA power in that most Arduino style boards provide. Powering it with anything less than that will give exactly the result you're seeing, it just never connects. Sometimes you'll see an obvious brown-out when the board suddenly stops resp...