Publisher is not publishing what can I do?

edit

Hi guys im trying to publish in the setpoint topic. When I do the rostopic echo /setpoint I get nothing not eaven the first value i tried everything yo yo know what can i do?

Note: motor.h has all the libraries that I need

#include "motor.h"

#define TIMER 0.1
#define ACCELERATION 75.0

MotorCluster motors(ACCELERATION, TIMER);

void ControlEffortCallback(const std_msgs::Float64& control_effort_input)
{
  control_effort=control_effort_input.data;
}
void motorPWM_callback(const geometry_msgs::Vector3::ConstPtr& msg)
{
  motors.moveRobot(msg->x, msg->y, msg->z);
}

int main (int argc, char** argv)
{
  ros::init(argc, argv, "motorPWM_node");
  ros::NodeHandle motorPWM_node;
  motors.initGPIO(m_camera, 1, 0);
  motors.initGPIO(m_left, 2, 3);
  motors.initGPIO(m_right, 4, 5);

  ros::Timer tmrMotor = motorPWM_node.createTimer(ros::Duration(TIMER), &MotorCluster::reportStat, &motors);
  ros::Subscriber motorPWM_sub = motorPWM_node.subscribe("moveRobot", 10, motorPWM_callback);
//For the PID
  ros::Subscriber conteff_sub=motorPWM_node.subscribe("control_effort",1, ControlEffortCallback);
  std_msgs::Float64 setpoint;
  setpoint.data=0.5;
  std_msgs::Float64 state;
  std_msgs::Float64 pid_enable;
  ros::Publisher setpoint_pub= motorPWM_node.advertise<std_msgs::Float64>("setpoint", 1);
  ros::Publisher state_pub= motorPWM_node.advertise<std_msgs::Float64>("state", 1);
  ros::Publisher pid_enable_pub= motorPWM_node.advertise<std_msgs::Float64>("pid_enable", 1);
  sleep (5);
 ROS_LOG(ros::console::levels::Info, ROSCONSOLE_DEFAULT_NAME, "[MOT] Node initialized");

ros::Rate loop_rate(0.5);

 while (ros::ok())
 {
  ros::spinOnce();
  setpoint_pub.publish(setpoint);
  setpoint.data=3.0;
  setpoint_pub.publish(setpoint);

  state_pub.publish(state);
  pid_enable_pub.publish(pid_enable);
  loop_rate.sleep();
 }
  return 0;

}