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In recommend, some version of a raspberry pi. It is based on a Linux interface, and this allows you to program in any language you please


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write a distance function with the maximum value being the circumference, use rospy's Time function to update distance and whenever the current_distance exceeds the circumference, publish a zero velocity msg to stop the turtle.


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There are quite a few ways to go, and opinions vary both by person and by application. Check out these links to see some examples of this: https://stackoverflow.com/questions/2137153/does-it-matter-which-microcontroller-to-use-for-1st-time-embed-system-programmer https://electronics.stackexchange.com/questions/1199/what-are-good-microcontrollers-available-...


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$ rosmsg show turtlesim/Pose Get the pose. How are you wanting to know if it did a complete revolution? You could check that the path length is equal to the circumference, or that the rotation angle is back to the start angle, or the horizontal x/y position is the same as the starting position.


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Try with the old Raspberry Pi 2, ARM A7 900MHz first. If it is too slow, then you can check ARM R or M microprocessor. If you want to deploy your Python code you need an OS for it. Using Ubuntu on ARM M will be difficult.


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Some "robots" can be implemented without any micro-controller at all. When I was a child, I created "robots" by just gluing empty cigarette packs together. There are other robots which are so complex, that a single micro-controller is not enough at all. So the choice depends highly on the product you want to develop. For any project, when ...


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How is the (P) controller not standing up to its task ? Well, just like you said - how is it not standing up to its task? What is it doing that makes you think it's not working? You said, I tried multiple values of Kp but could not succeed Nobody here knows what that means. "Could not succeed" could be a lot of problems. My guess is that you're ...


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When working with odometry, you need to consider that the resulting calculation may not be valid when comparing frames. Therefore I’d suggest you add try and except statements.


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