ETH is only sending some UDP bytes, then less, then nothing.

I wrote a very simple sketch that sends an UDP message ("LOOPING.") in a loop

https://pastebin.com/46H8E4n9

the problem:
It only sends the full message the first time. "LOOPING."
The next is only "ING."
Then "G."
And finally only the dot. "."

All following messages are empty.
https://i.gyazo.com/4122f1db2005297326f05b16c849856d.png

The exact same sketch works flowless on an Arduino Uno + Ethernet Shield.
All my libs are up to date.

It IS working, if I do a begin() and stop() before and after every message.

Udp.begin(localPort);
Udp.beginPacket(miniserver_ip, miniserver_port);
Udp.write("LOOPING.");
Udp.endPacket();
Udp.stop();

Comment

Richard

| 2 1 2

Asked on 11/5/17, 3:55 AM

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1433 Views

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I found what was causing the problem:
SPI frequency must be set to 4MHz (instead of 8MHz) in Ethernet2/src/utility/w5500.cpp

Comment

Richard

| 2 1 2

Answered on 11/5/17, 8:48 PM

vote

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Asked: 11/5/17, 3:55 AM
Seen: 1433 times
Last updated: 11/5/17, 8:48 PM