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A* ALGORITHM BASICS FOR PATH FINDING & HEURISTICS METHODS : ARTIFICIAL INTELLIGENCE

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 A* ALGORITHM BASICS FOR PATH FINDING A* , widely used  known form of best-first search & path planning algorithm nowadays in mobile robots,games. this is the function for A*,                                     f(n) = g(n) + h(n) g ( n ) is the cost of the path from the start node to n , and h ( n ) is a heuristic function that estimates the cost of the cheapest path from n to the goal This will find cheapest f(n) value in neighbor nodes to archive goal node. check below image  A to B path finding with g(n),h(n),f(n) value In the final level check below image Now we will check the Algorithm // A* Search Algorithm 1. Initialize the open list 2. Initialize the closed list put the starting node on the open list (you can leave its f at zero) 3. while the open list is not empty a) find the node with the least f on the open list, call it "q" b) pop q off the open list c) generate q's 8 successors
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Setting up Arduino lib in ROS & Arduino IDE

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 Hi guys let see how to setup arduino with ros(robot operating system)

Before this step u need to install arduino & ros in ubuntu
Then after u need to copy & paste this code in ur terminal and press ENTER

       sudo apt-get install ros-indigo-rosserial-arduino
      sudo apt-get install ros-indigo-rosserial

 press enter .

then u need to find out arduino lib folder in ur HOME & open ther terminal on it

then u need to copy & paste this code in that terminal
        rosrun rosserial_arduino make_libraries.py
 and press enter .

then open the arduino IDE and upload a sample code in ur board
 Now let see how to do in ros . check whether ur ros arduino lib is install or not.
start the ros master using "roscore"

connect the arduino with ros
          roslaunch rosserial_python arduino_one.launch
 
in arduino publisher node name is chatter ..  we can check its work or not
 using "rostopic list"

we can display the chatter node using "rostopic echo node_name"
u need to change the char length in arduino code

before upload ur code to arduino please disconnect ur ros connection


now node is publishing the data from arduino board to ros

thats it guys

watch this steps in






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A* ALGORITHM BASICS FOR PATH FINDING & HEURISTICS METHODS : ARTIFICIAL INTELLIGENCE

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