subscriber.md

Subscriber

Learn by doing

Basic

• Subscribe to "hello world" publisher and print it.Pair - helloworld_subscriber.[cpp|py]
• Subscribe to array of integer and print it. - array_subscriber.[cpp|py]

Advanced

• Write two programs with below architecture, whenever first program publishes "Hi", second program should publish "hello" and similarly for "Mission completed" ,"Well done" - pub_and_sub_pg1.[cpp|py], pub_and_sub_pg2.[cpp|py]

• Write two programs with below architecture, one program contains two publishers - two_pub.[cpp|py]

// Pseudo code
// Publish in the below code format
for(...)
{
    // Publishes numbers from 0 to n
    Publisher1(<integer>)

    // Publishes alphabat
    Publisher2(<alphabat>)
}

Another program, contains two subscriber - two_sub.[cpp|py]

subscriber_callback1(...)
{
    // Print the data from topic

    // Sleep for 10 seconds
    ros::Duration(10).sleep()
}

subscriber_callback2()
{
    // Print the data from topic
}

Ask yourself

• Is there any better way to communicate instead of the first program in advanced ?