fixed UDP conventions for working with both real and sim Tellos

tello_land.m

+%% final script for tello landing
+% open udp socket for communication with Tello drone (sim AND real)
+u_lb = udp('127.0.0.1',    8889);
+u_dr = udp('192.168.10.1', 8889);
+fopen(u_lb);
+fopen(u_dr);
+% send command to get tello ready to receive commands
+fwrite(u_lb,'command');
+fwrite(u_dr,'command');
+% send command to takeoff
+fwrite(u_lb,'land');
+fwrite(u_dr,'land');
+% close socket so that simulink or other software can use it
+clear u_lb;
+clear u_dr;

tello_takeoff.m

 %% initialization script for tello takeoff
-% open udp socket for communication with Tello drone (sim or real)
-u = udp('127.0.0.1', 8889);
-fopen(u);
+% open udp socket for communication with Tello drone (sim AND real)
+u_lb = udp('127.0.0.1',    8889);
+u_dr = udp('192.168.10.1', 8889);
+fopen(u_lb);
+fopen(u_dr);
 % send command to get tello ready to receive commands
-fprintf(u,'command\n');
+fwrite(u_lb,'command');
+fwrite(u_dr,'command');
 % send command to takeoff
-fprintf(u,'takeoff\n');
+fwrite(u_lb,'takeoff');
+fwrite(u_dr,'takeoff');
 % send command to request video stream
-fprintf(u,'streamon\n');
+fwrite(u_lb,'streamon');
+fwrite(u_dr,'streamon');
 % close socket so that simulink or other software can use it
-clear u;
+clear u_lb;
+clear u_dr;