WIZ850io UDP stops working after 60-90 minutes

Question

Hello and thanks for making such great products! I’m using STM32F103C8T7 processor connected to WIZ850io module. I am running a test program that sends a short UDP message every second. After approximately an hour, the socket stops sending. Once failed, the Interrupt (IR) register contains 0x0. When successful the IR register contains 0x10. Retrying the send fails, and I cannot send again until after I reset the 850io module. I have tested the program on an Adruino Uno with Ethernet Shield (W5500) and it runs fine. Any assistance appreciated. If there is a way to restart sending without reset that would be great too. Thanks again, WG

lawrence · Answer

hi, indridkold there are two interrupt registers, common IR and socket Sn_IR. Do you mean common IR register ? If it is common IR, 0x10 bit is magic packet bit. It means you turned on WOL mode and WIZ550io received magic packet. And if it is socket Sn_IR, the interrupt bits should be 0x00. (if there is no timeout and recv) so… only with Interrupt, it is hard to find the reason. Could you check getSn_CR(sn) after setSn_CR(sn,Sn_CR_SEND) in sendto() ?

indridkold · Answer

Additional… For testing I setup an old Arduino Uno with an Ethernet Shield 2. UDP transmit on the UNO and Shield has run for over 24 hrs with no failure. Could there be a firmware issue? Both the WIZ850io and the Shield 2 use the W5500 chip, but multiple WIZ850io units fail within minutes. Is there firmware on the W5500 that can be updated? Thanks again for any assistance, WG

indridkold · Answer

Hello, we’re still having problems with reliability. Regarding socket 0 register values you asked about previously, After the send is successful… SnCR = 0x0 SnIR = 0x10 After the send fails… SnCR = 0x0 SnIR = 0x0 Are there any other registers we can check? The socket will not even respond to ping request after failing to send. Any assistance appreciated, Thanks, IK