Moving Lego NXT's motor
I've been playing with ROS+Lego NXT and after successfully playing with the sensors I got stuck trying to move one motor.
The only parameter I found on nxt_msgs related to that is JointCommand, but JointCommand only has "effort".
So I tried:
rostopic pub /joint_command nxt_msgs/JointCommand '{name: 'motor', effort: 10}'
And confirmed that this value changed with:
rostopic echo joint_command
name: motor effort: 10.0
But no movement. I also tried the nxt_teleop demo, but no matter the arrow key I press, none of the motor move.
I also tried the steps described in this post, but had no success ( http://answers.ros.org /question/486/trouble-following-lego-nxt-tutorials)
Any ideas? thanks