WIZ107SR Occasional Lost Data (Serial -> TCP)

JLCJoe · 2014-02-25T02:39:06+09:00

Hello, We have been using the WIZ107SR (and WIZ108SR) for quite some time and are have been quite happy with it. We are using it in a control panel with switches, encoders, LEDs and LCDs for a bidirectional data link to a host computer. Unfortunately, we have received a report from a customer that is experiencing occasional lost bytes. Here is a sample of the data exchange between the serial side and the ethernet side of the WIZ107SR. Each line is a separate TCP Packet: Serial → Ethernet 80 00 0d f7 Ethernet → Serial f0 15 31 04 01 0d f7 Ethernet → Serial f0 15 31 02 02 b4 00 ef 1f 00 01 f7 Ethernet → Serial f0 15 31 02 03 b5 01 ee 1e 01 00 f7 Ethernet → Serial f0 15 31 01 02 b7 08 01 00 31 20 30 30 30 31 f7 Ethernet → Serial f0 15 31 02 02 b4 20 ef 3f 00 01 f7 Ethernet → Serial f0 15 31 02 03 b5 21 ee 3e 01 00 f7 Ethernet → Serial f0 15 31 01 02 b7 28 01 00 31 20 30 30 30 31 f7 Ethernet → Serial f0 15 31 02 02 b4 40 ef 5f 00 01 f7 Ethernet → Serial f0 15 31 02 03 b5 41 ee 5e 01 00 f7 Ethernet → Serial f0 15 31 01 02 b7 48 01 00 31 20 30 30 30 31 f7 Ethernet → Serial f0 15 31 02 02 b4 60 ef 7f 00 01 f7 Ethernet → Serial f0 15 31 02 03 b5 61 ee 7e 01 00 f7 Ethernet → Serial f0 15 31 01 02 b7 68 01 00 31 20 30 30 30 31 f7 Serial → Ethernet 80 0c f7 Serial → Ethernet 80 00 0b f7 Serial → Ethernet 80 00 0a f7 Looking on the serial side, the data coming into the serial side of the WIZ107SR is: Serial → Ethernet 80 [color=#FF0000]00[/color] 0c f7 Serial → Ethernet 80 00 0b f7 Serial → Ethernet 80 00 0a f7 The byte 00 highlighted in red is missing from the TCP packet. This does nor occur if I do not send Ethernet → Serial data. This issue occurs on multiple WIZ107SR modules. I am using: WIZ107SR Rev 1.1 Firmware 2.20 TCP Server Mode Debug Message Output disabled Baud Rate = 115200 Data bits = 8 Parity = odd Stop bits = 1 Flow Control = none Timer = 10 Size = 0 Character = F7 (this is the end of our command, we use this to trigger new TCP packet) Inactivity Timer = 0 Is there anything we can do to prevent this behavior from occurring? Thanks in advance.

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