And I have try to set the matlab as the server, but it does't work, and it cann't receive information form matlab.
In simulink, how can use the UDP receive information from another Linux target.
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I have a Linux c++ code, it can work well with simulink instrumen UDP send toolbox, I can receive the data from the matlab. But when I send my data to the matlab, it can't work, does anyone can help me ?Thank you !
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1086780/image.png)
#include <iostream>
#include <stdint.h>
#include <stdio.h>
#include <errno.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#define BUFFER_SIZE 1024 // buf size
int main(int argc, char *argv[])
{
struct sockaddr_in serv_addr;
double recv_buf[1024]={0};
int ret,sock_fd;
socklen_t addr_len;
// create two-way transmission socket
if ((sock_fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
perror("error");
// initialize address
memset(&serv_addr, 0, sizeof(struct sockaddr_in));
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(5002);
serv_addr.sin_addr.s_addr = inet_addr("192.168.1.101");
// // bind the local port
// if ((bind(sock_fd, (struct sockaddr *)&serv_addr,
// sizeof(struct sockaddr_in))) < 0)
// {
// perror("bind");
// return -1;
// }
double u[3]={1,2,3};
while(1)
{
addr_len = sizeof(struct sockaddr_in);
if((ret=recvfrom(sock_fd, recv_buf, sizeof(recv_buf),0, (struct sockaddr *)&serv_addr, &addr_len))<0)
return -1;
for(int i=0;i<7;i++)
std::cout<<recv_buf[i]<<std::endl;
if((sendto(sock_fd,u,sizeof(u),0, (struct sockaddr *)&serv_addr, sizeof(struct sockaddr_in)))<0)
return -1;
}
return 0;
}
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