Hello
Could someone help me out about the reason of the roslaunch error :
MoveInSquare.srv:
---
bool complete
My python file for the service server :
#! /usr/bin/env python
import rospy
from turtlebot3_move.srv import MoveInSquare, MoveInSquareResponse
from geometry_msgs.msg import Twist
from sensor_msgs.msg import LaserScan
rate = rospy.Rate(2)
def my_callback(request):
print("callback called")
i=0
while i<4:
print("callback called")
print("moving forward")
cmd.linear.x = (0.15)/5
cmd.angular.z = 0
pub.publish(cmd)
rospy.sleep(5)
print("Rotate")
cmd.linear.x = 0
cmd.angular.z = 0.33
pub.publish(cmd)
rospy.sleep(5)
if ls.ranges[360] < 0.2:
print("stop")
cmd.linear.x = 0
cmd.angular.z = 0
pub.publish(cmd)
pub2.publish(ls)
rate.sleep()
print("There is an Obstacle in font...")
i+=1
print("stop")
cmd.linear.x = 0
cmd.angular.z = 0
pub.publish(cmd)
rospy.sleep(5)
response = MoveInSquare()
response.complete= True
return response # the service Response class, in this case EmptyResponse
rospy.init_node('move_in_square_server')
my_service = rospy.Service('/move_in_square', MoveInSquare, my_callback)
#response = MoveInSquareMessageResponse()
pub = rospy.Publisher('/cmd_vel', Twist, queue_size=1)
pub2 = rospy.Publisher('/scan', LaserScan, queue_size=1)
while pub.get_num_connections() < 1:
pass
cmd = Twist()
ls = LaserScan()
rospy.spin()
launch file for the service server
<launch>
<!-- Start Service Server for move_in_square service -->
<node pkg="turtlebot3_move" type="Service_server.py" name="move_in_square_server" output="screen">
</node>
</launch>
This is part of the error
rospy.exceptions.ROSInitException: time is not initialized. Have you called init_node()?
[move_in_square_server-1] process has died [pid 26524, exit code 1, cmd /home/user/catkin_ws/src/turtlebot3_move/src/Service_server.py __name:=move_in_square_server __log:=/home/user/.ros/log/175ccd66-8cd8-11ec-980e-0242c0a8d007/move_in_square_server-1.log].
log file: /home/user/.ros/log/175ccd66-8cd8-11ec-980e-0242c0a8d007/move_in_square_server-1*.log
