ISM43362 WIFI Module on B-L475E-IOT01A

[Erenburg.Evgeny]

I connect with the module to an Access Point and get IP. Now I have some devices connected to the same Access Point. I want to receive UDP packets from the devices.

What should I do? I can connect only with TCP

if (WIFI_StartServer(SOCKET, WIFI_TCP_PROTOCOL , 1, "", PORT) == WIFI_STATUS_OK)
        USART_SendString(SYS_USART, "Start server - SUCCESS\r");
    else
        USART_SendString(SYS_USART, "Start server - ERROR\r");

WIFI_UDP_PROTOCOL connection fails. How can I get UDP packets?

[Erenburg.Evgeny]

OK. I connect to AP and set UDP server

ES_WIFI_Status_t ES_WIFI_StartUdpServer(ES_WIFIObject_t *Obj, uint16_t port)
{
     ES_WIFI_Status_t ret = ES_WIFI_STATUS_ERROR;
     
     //Select UDP Protocol
     sprintf((char*)Obj->CmdData, "P1=1\r");
     ret = AT_ExecuteCommand(Obj, Obj->CmdData, Obj->CmdData);
     
     if( ret == ES_WIFI_STATUS_OK)
     {
         //Set Port
         sprintf((char*)Obj->CmdData,"P2=%d\r", port);
         ret = AT_ExecuteCommand(Obj, Obj->CmdData, Obj->CmdData);
         
         if( ret == ES_WIFI_STATUS_OK)
         {
             //Start UDP Comm Server
             sprintf((char*)Obj->CmdData, "P5=1\r");
             ret = AT_ExecuteCommand(Obj, Obj->CmdData, Obj->CmdData);
         }
     }
     
    return ret;
}

I get

WIFI INIT OK

MAC ADDRESS C4:7F:51:7:B5:A5

Connected: Got IP Address 172.16.1.120

UDP server - SUCCESS

Now I receive a data

ES_WIFI_Status_t ES_WIFI_AltReceiveData(ES_WIFIObject_t *Obj, uint8_t Socket, uint8_t *pdata, uint16_t Reqlen, uint16_t *Receivedlen, uint32_t Timeout)
{
  uint32_t wkgTimeOut;
 
  ES_WIFI_Status_t ret = ES_WIFI_STATUS_ERROR;
 
  if (Timeout == 0)
  {
    wkgTimeOut = NET_DEFAULT_NOBLOCKING_READ_TIMEOUT;
  }
  else
  {
    wkgTimeOut = Timeout;
  }
 
  LOCK_WIFI();
 
  if(Reqlen <= ES_WIFI_PAYLOAD_SIZE )
  {
      sprintf((char*)Obj->CmdData,"R1=%d\r", Reqlen);
      ret = AT_ExecuteCommand(Obj, Obj->CmdData, Obj->CmdData);
      if(ret == ES_WIFI_STATUS_OK)
      {
        sprintf((char*)Obj->CmdData,"R2=%lu\r", wkgTimeOut);
        ret = AT_ExecuteCommand(Obj, Obj->CmdData, Obj->CmdData);
        if(ret == ES_WIFI_STATUS_OK)
        {
          sprintf((char*)Obj->CmdData,"R0\r");
          ret = AT_RequestReceiveData(Obj, Obj->CmdData, (char *)pdata, Reqlen, Receivedlen);
          if (ret != ES_WIFI_STATUS_OK)
          {
            DEBUG("AT_RequestReceiveData  failed\n");
          }
        }
        else
        {
         DEBUG("setting timeout failed\n");
        }
      }
      else
      {
        DEBUG("setting requested len failed\n");
        *Receivedlen = 0;
      }
  }
  UNLOCK_WIFI();
  return ret;
}

On

sprintf((char*)Obj->CmdData,"R0\r");

 ret = AT_RequestReceiveData(Obj, Obj->CmdData, (char *)pdata, Reqlen, Receivedlen);

I get - ret = ES_WIFI_STATUS_UNEXPECTED_CLOSED_SOCKET

What's wrong?