WIZ750SR: Problem using in serial command mode

Question

Hi there, WIZ750SR (PCB Ver1.2; FW Ver1.3.3) has been working fine and I am able to change configuration like IP, Gateway, Port# etc via “WIZnet S2E Configuration Tool v1.3.0”. In my application, I want to change the configuration parameters through W7500P data port. I have enabled the serial command mode with default trigger code “+++”. I am using Hercules setup utility software in my PC for seeing/sending the data on both ends, ethernet as well as Serial. I can see the data being forwarded to other end is fine. Like, if I transmit any character through serial, I can read it on ethernet side and vice-versa. For switching the device W7500P in command mode, when I send “+++” on serial, the ethernet link breaks immediately and the device is switching to command mode or ATMODE (verified through “WIZnet S2E Configuration Tool v1.3.0”). But after that I am not able to get any response for any command being sent through serial port. e.g. command “MA$0d$0a” returns nothing. I am referring to command manual link: Command Manual-[EN] | WIZnet Document System Thanks in advance for your time. Regards, Harish KS

rena · Answer

Hi, MA & PW is a command that acts as a kind of header when sending commands through Ethernet. They are not used in serial command mode. How about other commands like MC, VR, LI? If you entered ATMODE normally, there should be a response.

Harish Kumar Singh · Answer

anybody? please help. regards, Harish KS

rena · Answer

Hi @Harish_Kumar_Singh, Sorry for the late reply. I checked the problem. When using the WIZ750SR-RS485 module, can enter ATMODE and change settings, but cannot receive the response. Can you connect the debug port? Operation information can be checked through the port. After confirming this issue with the engineer in charge, we will let you know.

irina · Answer

Hi~ As you said, it seems to be a bug that only occurs when using wiz750sr-485. Please download the firmware and upload it through the WIZconfig tool to test it. WIZ750SRv133_#24_issue.zip (27.9 KB) You can see the return message through the RS485