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試圖通過linux中的串口讀取sms消息，從一張安裝在華爲3g USB調制解調器內的SIM卡讀取。我必須在屏幕上顯示一些短信之前執行腳本。有時它顯示不尋常的字符。我想要做的就是使用AT命令，c和串行端口從SIM卡中讀取短信。以下是我正在使用的代碼。在Linux下使用串口讀取SIM卡上的SMS消息使用C
int main(){
int fd;
struct termios options;
/* open the port */
fd = open("/dev/ttyUSB0", O_RDWR | O_NOCTTY | O_NDELAY);
if (fd == -1)
{ /* Could not open the port */
fprintf(stderr, "open_port: Unable to open /dev/ttyS1 - %s\n",strerror(errno));
}else{
printf("port opened\n");
}
fcntl(fd, F_SETFL, 0);
/* get the current options */
tcgetattr(fd, &options);
/* set raw input, 1 second timeout */
options.c_cflag |= (CLOCAL | CREAD);
options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
options.c_oflag &= ~OPOST;
options.c_cc[VMIN] = 0;
options.c_cc[VTIME] = 10;
/* set the options */
tcsetattr(fd, TCSANOW, &options);
char buffer[400]; /* Input buffer */
char *bufptr; /* Current char in buffer */
int nbytes; /* Number of bytes read */
int tries; /* Number of tries so far */
for (tries = 0; tries < 1; tries ++)
{
/* send an AT command*/
if (write(fd, "AT+CMGL=\"ALL\"\r", strlen("AT+CMGL=\"ALL\"\r")) < 3){
printf("command sent\n");
continue;
}
/* read characters into our string buffer*/
bufptr = buffer;
nbytes = read(fd, bufptr, buffer + sizeof(buffer) - bufptr - 1);
printf("%s\n",bufptr);
char *p;
p = strstr(buffer, "tin");
printf("%s",p);
p = strstr(buffer, "server");
if(p == NULL) printf("not from server\n");
*bufptr = '\0';
}
return 0;
}