You have now to transmit commands to the robot using DT packets. These are the commands you should be able to send:
f forward
b backward
l turn a bit left
r turn a bit right
In turn, the robot must send back information to the PC (again as DT packets) when it bumps:
bl left bump
br bump right
On Thursday, you should have your code working both on the PC and on your lego brick. We will try to see whether your code can work with other students' code, so that commands to a lego brick can be relied for some distance.