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njh / EtherCard

EtherCard is an IPv4 driver for the ENC28J60 chip, compatible with Arduino IDE
https://www.aelius.com/njh/ethercard/
GNU General Public License v2.0
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UDP listener dont pass more than 19 byte packets #265

Open sziti opened 7 years ago

sziti commented 7 years ago

Hello,

It seems UDP listener only process incoming UDP packets less than 19 bytes.

I use UdpListener example and when I send UDP packet: "123456789012345678" dipslay it: dest_port: 3000 src_port: 36412 src_port: 192.168.1.227 data: 123456789012345678

When I send "1234567890123456789" it displays nothing.

Other UDP listener tools receive longer packets correctly. I use Arduino Mega 2560 board and generic ENC28J60 eth mdule. Thanks, Peter

jcw commented 7 years ago

Is your buffer large enough? (example)

sziti commented 7 years ago

Yes, I tried with default setting (byte Ethernet::buffer[500];) and tried to increse to 1500. Same result...

niclasboy commented 7 years ago

Hey, i have got the same problem! Do you solved it?

sziti commented 7 years ago

Hello, no i haven't :-( I've tried to figure out how incoming UDP packets processed in this library but it is too complicated for me...

My current workaround is using an esp8266 to receive UDP brodacast via wifi and pass them to Arduino Mega board by serial port.

But it would better to use wired ethernet to receive packets too.

Jcw, could you help to solve it?