Question

我正在尝试将tcp数据包发送到服务器，但无法使用mbed OS，stm32核板和Adafruit fona 3g进行发送。我正在使用以下链接中找到的.cpp文件和.h文件：

https://os.mbed.com/users/Nels885/code/Adafruit_FONA_3G/file/b18cfba4283a/

我已经分别测试了客户端和服务器。通过客户端，我能够与回显服务器建立连接。对于服务器，我使用计算机通过套接字将数据发送到EC2实例，并且这两种方法都可以成功通信。但是，我无法使两者一起工作，并且我认为问题出在收发器上，因为我无法确认收发器是否正在发送数据。

客户代码：

#include "mbed.h"
#include "Adafruit_FONA.h"

#define FONA_RST D4
#define FONA_TX D1
#define FONA_RX D0
#define FONA_RI D7 //not used

char replybuffer[255];


Adafruit_FONA_3G fona(FONA_TX, FONA_RX, FONA_RST, FONA_RI);
Serial pc(USBTX, USBRX);


int main() 
{
     while(1){

    fona.TCPinitialize();
    pc.printf ("initialize \n");


    char Timeout[21];
    fona.getTCPtimeout(Timeout);
    pc.printf ("timeout \n");


    char Server[] = "18.216.194.185"; 
    uint16_t Port = 10001;
    fona.TCPconnect(Server,Port);
    pc.printf ("connect \n");


    char Packet[] = "Pick Up %";
    fona.TCPsend(Packet);
    pc.printf ("send \n");

    fona.sslTCPsend(Packet);
    pc.printf ("ssl send \n");

    fona.TCPclose();
    pc.printf ("close \n");


    }
    }

服务器代码：

// Server side C/C++ program to demonstrate Socket programming 
#include <unistd.h> 
#include <stdio.h> 
#include <sys/socket.h> 
#include <stdlib.h> 
#include <netinet/in.h> 
#include <iostream>
#include <string.h> 
#define PORT 10001 
int main(int argc, char const *argv[]) 
{ 
    int server_fd, new_socket, valread; 
    struct sockaddr_in address; 
    int opt = 1; 
    int addrlen = sizeof(address); 
    char buffer[1024] = {0}; 
    char *hello = (char*)"Henlo from server";
    std::string message;

    // Creating socket file descriptor 
    if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) 
    { 
        perror("socket failed"); 
        exit(EXIT_FAILURE); 
    } 

    // Forcefully attaching socket to the port 8083 
    if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, 

&opt, sizeof(opt))) 
    { 
        perror("setsockopt"); 
        exit(EXIT_FAILURE); 
    } 
    address.sin_family = AF_INET; 
    address.sin_addr.s_addr = INADDR_ANY; 
    address.sin_port = htons( PORT ); 

    // Forcefully attaching socket to the port 8080 
    if (bind(server_fd, (struct sockaddr *)&address, 

sizeof(address))<0) 
    { 
        perror("bind failed"); 
        exit(EXIT_FAILURE); 
    }

    //check connection
    int error_code;
    socklen_t error_code_size = sizeof(error_code);
    int connectionState = getsockopt(server_fd, SOL_SOCKET, SO_ERROR, 
&error_code, &error_code_size);

    if (error_code != 0)
    {
         fprintf(stderr, "socket error: %s\n", strerror(error_code)); 
    }
    else std::cout << "connection established with port 10001\n";

    if (listen(server_fd, 3) < 0) 
    { 
        perror("listen"); 
        exit(EXIT_FAILURE); 
    } 
    if ((new_socket = accept(server_fd, (struct sockaddr *)&address, 
                    (socklen_t*)&addrlen))<0) 
    { 
        perror("accept"); 
         exit(EXIT_FAILURE); 
    } 
    valread = read( new_socket , buffer, 1024); 
    printf("%s\n",buffer ); 
    message = buffer;
    std::cout << "the message I recieved says " << message << '\n';
    send(new_socket , hello , strlen(hello) , 0 ); 
     printf("Hello message sent\n"); 
    return 0; 
}

使用Adafruit Fona 3g将tcp数据包发送到服务器

0 个答案: