Ethernet.begin(mac) freezes the arduino

i purchased first arduino (arduino leonardo eth) , have made great progress on project ultrasonically reading level of water in rain water collection pit.
i succeeded in reading distance , displaying on tft screen purchased.

the goal of project able read water level through ethernet port.


i'm having trouble running sample programs (eg. dhcpaddressprinter). fails on command ethernet.begin(mac).

the code runs command ethernet.begin, , freezes arduino.

i have tried quite few things, have come point don't know further.

i have found sources of ethernet library , start debugging find @ point freezes

is there way debug ethernet library source code? (such serial.println)

many in advance time!

bram

sounds arduino having trouble reaching dhcp server.  what router have arduino connected to?

Arduino Forum > Using Arduino > Networking, Protocols, and Devices (Moderator: fabioc84) > Ethernet.begin(mac) freezes the arduino

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