Voice Implementation
Overview
This week, we built a ROS node that subscribes to a new topic, /things_to_say, and uses a text-to-speech service to make the computer speak the messages of type std_msgs/String.
Prerequisite
If you receive an error when you try to run this node, the computer likely does not have pyttsx installed. To install it, simply run pip install pyttsx --user.
If that command fails, the computer likely does not have pip installed. To install it, run sudo apt-get install python-pip and then attempt the pyttsx install again.
Running the node
To run the node, run rosrun cr_ros talk.py
Making it talk
Once the node is launched, publish a String to the /things_to_say topic from any device connected to the same ROS core as the node.
Sample standalone command: rostopic pub /things_to_say std_msgs/String 'Kill all humans'
Sample Python script:
import rospy
from std_msgs import String
pub = rospy.Publisher('/things_to_say', String, queue_size=1)
rospy.init_node('say_something')
pub.publish('Kill all humans')