I’m trying to complete quiz 3.7 on topic 3 Ros2 Humble (python). I am attempting to apply the code used in Exercise 3.1. I am able to get the robot to move to where there is a gap but then I am stuck inside of an If statement reading the laser distance to be infinity. Below is the if statement i believe I’m stuck in.
def laser_callback(self, msg):
# Save the frontal laser scan info at 90° directly to left
self.laser_forward = msg.ranges
def motion(self): # print the data self.get_logger().info('I receive: "%s"' % str(self.laser_forward)) # Logic of move if self.laser_forward == 'inf': self.cmd.linear.x = 0.0 self.cmd.angular.z = 0.0 elif self.laser_forward < 4 and self.laser_forward >= 3: self.cmd.linear.x = 0.5 self.cmd.angular.z = 0.0 else: self.cmd.linear.x = 0.0 self.cmd.angular.z = 0.0 # Publishing the cmd_vel values to a Topic self.publisher_.publish(self.cmd)