ghost's profile - activity

hi there... My plan is want to use the colour sensor that programmed in arduino...then send the message to ROS.Then i can use it on turtlebot teleop, and the way is it will change the speed automatically by detecting the colour. I want do like traffic light, when the sensor detect green colour it will go fast, and when it detect yellow it will go slow..and when the sensor detect the red colour it will stop the telop. 1) is that possible? 2) What is the way that I can make this work done? 3) Is there any changing at node? topic?

regards

Hi there, My company producing hardware robotic device. Can somebody evaluate me about ROS? because i want to using ROS for my robot. How should i know whether i should use ROS for my company or not? What are critical evaluation of ROS that i need to take care about? The important thing is what issues i might face and what might i need to take into account?

regards

Hi there, Almost everyday of my life, im working with ROS, but sometimes i was thinking what is actually the advantages and disadvantages using ROS. Can anybody give me some explanation and theory about this? It is fine if u want explain it on education area, industry area or any area. thank you

regards

Hi there, I have learn all tutorial about ros like rqt graph, rosnode list making package and the others. I also have learnt all tutorial about turtlebot like gmapping,rvis, teleop, and other things. I just want to know other than that, what else ROS can do, or what else are interesting about ROS that can impress other people?

regards

nice explanation..thank you

Im running the gmapping while drive it around

Hi there. I m making mapping with my turtlebot by using ros gmapping. I notice that the slower the speed of turtlebot movement, the better map result that i got in rvis map. But i dont know why, and what theory that can support me to say this.please help me by giving the best reason.

regards

Hi there. Im running the rqt graph code.as you know there is lot of line, and when you move the mouse at the line, there will be colour on the line like red, green, orange,blue and others. So what are the meaning for each colour on the rqt graph? regards.

the slope is really big....hmmm... is there any information and change in node, rqt graph or other else..because i need to give good reason for this problem

Hi there Im doing the gmapping with turtlebot. now i want explain my place condition.There are two side and just next to each other.one is flat ground and one is slope ground. when im doing gmapping at flat ground it working fine, after that i move my turtlebot to the slope ground. when the robot going down, it working fine and show the right position in rvis.But when the turtlebot moving up. the turtlebot in rvis going crazy. it show the turtlebot position jump to the flat ground. can somebody explain to me why this happen. thank you

regards

Hi there. I following the ros tutorial but when i do tutorial no 3 and no 4, at some point the ubuntu show me this error (The specified source space "/home/ros/catkin_ws/my_src" does not exist). can somebody help me with this error

thanks

Hi there. I would like to make maze program for my turtlebot. The method is i will put white tape on the floor and the turtlebot will detect the colour by colur sensor that programmed by arduino. Is it possible to do that? how about with the package and nodes? what else i need to consider?