[🤔 ROS2?] /hri_face_detect/ready#

Caution

This documentation page has been auto-generated.

It may be missing some details.

/hri_face_detect/ready Quick Facts

Category

👥 Social perception

Message type

std_msgs/msg/Bool

Direction

➡️ you normally subscribe to this topic.

A semaphore topic: True is published when the node is ready.

Quick snippets#

Check the publication rate#
$ ros2 topic hz /hri_face_detect/ready
Display the data published on the topic#
$ ros2 topic echo /hri_face_detect/ready

How to use in your code#

Subscribe to the topic using Python#
 1#!/usr/bin/env python
 2
 3import rclpy
 4from rclpy.node import Node
 5
 6from std_msgs.msg import Bool
 7
 8
 9class ReadySubscriber(Node):
10
11    def __init__(self):
12        super().__init__('hri_face_detect_ready_subscriber')
13        self.subscription = self.create_subscription(
14            Bool,
15            '/hri_face_detect/ready',
16            self.listener_callback,
17            10)
18
19    def listener_callback(self, msg):
20        # see https://docs.ros2.org/latest/api/std_msgs/msg/Bool.html
21        # for the msg structure
22        self.get_logger().info('I heard: "%s"' % msg.data)
23
24
25if __name__ == '__main__':
26    rclpy.init(args=args)
27
28    subscriber = ReadySubscriber()
29
30    rclpy.spin(subscriber)
31
32    rclpy.shutdown()