How to send serial data using WIZ750SR-110?

Question

I have configured WIZ750SR-110 as my server in DHCP mode. (Noted its IP address and Port Number). WIZ750SR-110 is connected to a Desktop using Serial Interface and the other end (Ethernet) is connected to RJ45 cable. The Desktop is running Putty to display incoming data on Desktop Screen and is configured correctly. (Baud Rate, data size, start and stop bits and Flow control match that of WIZ750SR-110). On the transmitting end is a Laptop that runs SSH terminal window using Putty. and the terminal is configured to connect to my server (WIZ750SR-110) using the IP address and Port number that was earlier recorded. THE PROBLEM: Now, when I start Putty on the transmitting (Laptop/client) side with SSH terminal, the receiving end Putty (Desktop/serial port) displays a message “SSH-2.0PuTTY_Release_0.71” and the configuration terminal of WIZ750SR-110 shows CONNECT as its status. When I try typing any data into SSH Terminal Putty, nothing gets displayed on the Serial Port Putty. Can someone help or tell where I am going wrong? Thank you in advance. Note: I have enabled character display under PuTTY settings so there is no issue on PuTTY side.

jameskim · Answer

Hello, Can you share the screenshot of your configuration tool? It would be helpful for me to figure out the reason. Thank you. BR, James.

jameskim · Answer

Hello, Isn’t there any terminal character like ‘0x0d’, ‘0x0a’ to send data from SSH terminal Putty to Serial Putty? The greeting message has that so that it was transferred but following message seems not to have it. Can you check it again? BR, James

neo · Answer

I changed the SSH Program. There was some problem with PuTTY, basically it was outdated. So switched to Hercules, as seen on other Wiznet forum posts and it worked just fine. Still Wondering what has changed on TCP/IP from the days of PuTTY that its SSH Terminal is not working. Maybe there is something with the settings that needs to be changed. I will check it later when I am free. Thanks once again James!

neo · Answer

Hi @Keshav_Shah, I am assuming you are running Hercules on PC and using it as a receiver to check data bytes. First you need to check if the WIZ750-SR-TTL eval board and Hercules are both on same network i.e. connected on same LAN. Second, you need to config the settings of WIZ750-SR-TTL as server using wizconfig utility and use Hercules in TCP client mode to connect to WIZ750-SR-TTL. You will need the IP address of WIZ750-SR-TTL and also its communication (COM) port number to be able to communicate with Hercules. On Hercules, with the IP address and COM Port details of WIZ750-SR-TTL you can initiate connection. If Hercules states that your connection was successful then verify the connection status of WIZ750-SR-TTL using wizconfig. Wizconfig should say server Status as Connected. Once these steps are done then you may start sending UART data from Arduino. If you still cannot see any data on Hercules, verify your Baudrate between Arduino and WIZ750-SR-TTL. Alternatively, you may check if Arduino is communicating using Hercules in Serial COM mode. Hope this helps.

Keshav Shah · Answer

Hi @neo, I have got the WIZ750SR-TTL0 board but do not have the evaluation board, so can you suggest me some other alternative to view the data sent from the Arduino on the PC via WIZ750SR-TTLL? As I tried Python socket programming but it showed an error in connection despite the connection being established when I typed “ping IP address” on the command prompt. On Hercules, I was shown connected but I didn’t have WIZ750SR-EVB. Thank you, Best Regards Keshav