initialization of checksum fixed!

groundStation/src/backend/backend.c

@@ -626,7 +626,7 @@ static void client_recv(int fd) {
 				if (tracker == NULL) {
 					char * dummy = TD_MAGIC " 1.0 2.0 3.0 4.0 5.0 6.0\n";
 					write(fd, dummy, strlen(dummy));
-				}else if (ucart_vrpn_tracker_getData(tracker, &td)) {
+				} else if (ucart_vrpn_tracker_getData(tracker, &td)) {
 					write(fd, TD_MAGIC " ERROR\n", strlen(TD_MAGIC " ERROR\n"));
 				} else { 
 					/* more than sufficient buffer */
@@ -651,17 +651,19 @@ static void client_recv(int fd) {
 				}
 			}
 		} else {
-			if(clientAddPendResponses(fd, packet) == -1) {
-				warnx("Ran out of room! Consider increasing CLIENT_MAX_PENDING_RESPONSES!\n");
-			} else {	
-				int datalen = (packet[6] << 8) | (packet[5]);
-				printf("sending %lf '", getFloat(packet, 7));
-				for(int i = 0; i < datalen + 8; ++i) {
-					printf(" 0x%x", (signed) packet[i]);
+			if (packet[1] == 0x02) {
+				if (clientAddPendResponses(fd, packet) == -1) {
+					warnx("Ran out of room! Consider increasing CLIENT_MAX_PENDING_RESPONSES!\n");
 				}
-				printf("'\n");
-				writeQuad((char *) packet, datalen +8);
 			}
+
+			int datalen = (packet[6] << 8) | (packet[5]);
+			printf("sending %lf '", getFloat(packet, 7));
+			for(int i = 0; i < datalen + 8; ++i) {
+				printf(" 0x%.2x", (signed) packet[i]);
+			}
+			printf("'\n");
+			writeQuad((char *) packet, datalen +8);
 		}
 		
 		char * rest = &buffer[newline] + 1;