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Controlling 4WD via Xbee wireless

hello..

i only got this item below..

XBee 1mW Wire Antenna x 2
XBee Explorer Dongle x 1
Roboduino Romeo x 1
Xbee Shield For Arduino x 1

i got a question on how to control my 4WD via Xbee wireless?
is it posible? sorry im newbie about all this :)

thanks :)

Problem with romeo example

hello guys..im new to this world especially arduino :) i just bought 4WD and roboduino romeo.The problem is after uploading the example,it does not move.Here i attach the example i use and my 4WD romeo picture

//Standard PWM DC control
int E1 = 5; //M1 Speed Control
int E2 = 6; //M2 Speed Control
int M1 = 4; //M1 Direction Control
int M2 = 7; //M1 Direction Control