Stefan Staub

It seems the init of the ring buffer struct is wrong. buffer end must initialized with 1 instead of zero. tx_buffer.end = 1; rx_buffer.end = 1;

Most parts are based on the Ethernet2 library were most licenses are missing because there are no infos about most parts of it. This makes library not illegal.

Can try the code from the main branch?

No, I mean the whole library itself, you can download it directly from the main branch and then install the library manually. There was a change in handling DHCP memory,...

Can you test please?

Thank you

In general, multicast should possible. For UDP there should a :::beginMulticast(IPAddress ip, uint16_t port) class member like on the Ethernet and Ethernet3 library.

How to do this? I can't upload anything, without or with st-link.

get this message: ``` For bug reports, read http://openocd.org/doc/doxygen/bugs.html Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD srst_only separate srst_nogate...

doesn't work: ``` For bug reports, read http://openocd.org/doc/doxygen/bugs.html Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD srst_only separate srst_nogate srst_open_drain...