diff --git a/sms_main.c b/sms_main.c
index 5945f02..168b424 100644
--- a/sms_main.c
+++ b/sms_main.c
@@ -193,7 +193,13 @@ int main(int argc, char* argv[])
 			usage();
 		if(strlen(argv[2]) > 160)
 			fprintf(stderr,"sms message too long: '%s'\n", argv[2]);
-	}else if (!strcmp("delete",argv[0]))
+	}
+	else if (!strcmp("send_raw_pdu", argv[0]))
+	{
+		if(argc < 2)
+			usage();
+	}
+	else if (!strcmp("delete",argv[0]))
 	{
 		if(argc < 2)
 			usage();
@@ -285,6 +291,50 @@ int main(int argc, char* argv[])
 		fprintf(stderr,"reading port\n");
 	}
 
+	if (!strcmp("send_raw_pdu", argv[0]))
+	{
+		int pdu_len = strlen(argv[1]);
+		//append ctrl-z to pdustr
+		char* pdu_str;
+		pdu_str = malloc(pdu_len + 4);
+		memcpy(pdu_str, argv[1], pdu_len);
+		sprintf(pdu_str + pdu_len, "%c\r\n", 0x1A);
+		const int pdu_len_except_smsc = 18;
+		snprintf(cmdstr, sizeof(cmdstr), "AT+CMGS=%d\r\n", pdu_len_except_smsc);
+		fputs("AT+CMGF=0\r\n", pf);
+		while(fgets(buf, sizeof(buf), pfi)) {
+			if(starts_with("OK", buf))
+				break;
+		}
+		fputs(cmdstr, pf);
+		printf("cmdstr: %s\n", cmdstr);
+		sleep(1);
+		fputs(pdu_str, pf);
+		printf("pdu_str: %s\n", pdu_str);
+		free(pdu_str);
+		alarm(5);
+		errno = 0;
+
+		while(fgets(buf, sizeof(buf), pfi))
+		{
+			if(starts_with("+CMGS:", buf))
+			{
+				printf("sms sent sucessfully: %s", buf + 7);
+				return 0;
+			} else if(starts_with("+CMS ERROR:", buf))
+			{
+				fprintf(stderr,"sms not sent, code: %s\n", buf + 11);
+			} else if(starts_with("ERROR", buf))
+			{
+				fprintf(stderr,"sms not sent, command error\n");
+			} else if(starts_with("OK", buf))
+			{
+				return 0;
+			}
+		}
+		fprintf(stderr,"reading port\n");
+	}
+
 	if (!strcmp("recv", argv[0]))
 	{
 		alarm(10);