Ive decided to make a robot for my thesis and i want to use xbee for rf communication. But there are some points i couldn't figured out.
I want to use two of Arduinos. One for mobile control and the other one for the controlling robot functions. But the things are:
Which communication type should i use when setting up xbees via x-ctu? I mean are there any master/slave topography? Can i use xbees as transreceiver or does the communication types limits that functions?
What type of things i can send with Xbees. For instance: can i send simply W,A,S,D or numbers like 1,2,3 via serial connection for commanding robot?
-If i had two of UNOs or Duemilanoves and if want to use sending commands with hyperterminal, im going to have to remove xbee shield because they are using the same pins. Can i change default serial pins for USB communication of boards with computer?
-Instead of two UNOs if i would use Arduino MEGA i know i can use 6 of serial ports. But still the board would be communicate with computer via same pins with xbee. Question is the same can i change default com port for communicate with computer? I can use other serial port for xbee i know about that i want to use shield for it.
I know i can use xbee explorer usb kind of stuff but i dont want to. For further applications like using a joystick for controlling robot on computer im going to need send datas over RF.
Last question: Are there any way to make my usb port (virtual rs232) make accessible over internet? Ethernet shields doesn't look like that simple. I really want to control it via internet i do some research about similar projects but i couldn't figured out the codes about it. I dont understand coding htmls...