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?