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Questions tagged [subscribers]

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Subscriber node doesn't work

I have followed a ROS2 tutorial and generated a subscriber for Turtlesim. With colcon build it was successfully finished but if I try to execute it, it doesn`t work....
Samy's user avatar
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i wanna blink a led with pwm and a potentiometer attached to a ADS1115 modulle using ros2 pubsub package

i had a while ago with some help from this forum sending potentiometer values from a publisher node to a subscriber node to blink a led in pwm but the led doesnt seem to receive values the talker node ...
Jonathan Dawsa's user avatar
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Decreased Hz Rate and Lag in Image Transfer with Multiple Subscriptions in ROS2 Communication

I'm encountering a problem in my ROS2 (Robot Operating System 2) communication setup where I've noticed a significant decrease in the frequency of data updates (measured in Hz) and increased lag in ...
Teja's user avatar
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Subscribing custom topic in ros-mobile

I am using px4-sitl and mavros for UAV simulation in ros noetic and try to teleopt the drone using ros-mobile. what I noted mavros has its own message type defined like ...
Mubashir's user avatar
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When will subscriber status callbacks be available in ROS2?

What are the plans for implementing rclcpp subscriber status callbacks (connect/disconnect) in ROS2? I found this ROS1 feature quite handy. Note that this question has been asked before but since that ...
Bernd Pfrommer's user avatar
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What is node_base_interface used for in ROS 2?

I am writing plugins using pluginlib and one of the initialization arguments are a node, like so: ...
Kaushal Sorte's user avatar
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1 answer
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Turtlesim: Stop after one turn. Subscriber way faster than the Publisher

I am interested in drawing one circle with the turtlesim. However the subscriber is retrieving the pose way faster than the publishers moves the turtle. This is the code that I came up with: ...
p10's user avatar
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Creating node with multiple subscribers working on shared data

I'm working with ROS2. Suppose I have a state estimator taking in multiple data forms at different rates, ex IMU and GPS or something similar. My state estimator will be a single node and this node ...
FourierFlux's user avatar