关于js和ros进行交互roslibjs

控制台结果输出效果：

话题结构：

html部分


<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />

<script type="text/javascript" src="http://static.robotwebtools.org/EventEmitter2/current/eventemitter2.min.js"></script>
<script type="text/javascript" src="http://static.robotwebtools.org/roslibjs/current/roslib.min.js"></script>

<script type="text/javascript" type="text/javascript">
	//连接ros
  var ros = new ROSLIB.Ros({
    url : 'ws://localhost:9090'
  });

  ros.on('connection', function() {
    console.log('Connected to websocket server.');
  });

  ros.on('error', function(error) {
    console.log('Error connecting to websocket server: ', error);
  });

  ros.on('close', function() {
    console.log('Connection to websocket server closed.');
  });

  // 发布一个话题

  var cmdVel = new ROSLIB.Topic({
    ros : ros,
    name : '/cmd_vel',
    messageType : 'geometry_msgs/Twist'
  });

  var twist = new ROSLIB.Message({
    linear : {
      x : 0.1,
      y : 0.2,
      z : 0.3
    },
    angular : {
      x : -0.1,
      y : -0.2,
      z : -0.3
    }
  });
  cmdVel.publish(twist);

  // 订阅一个话题
 
  var listener = new ROSLIB.Topic({
    ros : ros,
    name : '/listener',
    messageType : 'std_msgs/String'
  });

  listener.subscribe(function(message) {
    console.log('Received message on ' + listener.name + ': ' + message.data);
    listener.unsubscribe();
  });

  // Calling a service


  var addTwoIntsClient = new ROSLIB.Service({
    ros : ros,
    name : '/add_two_ints',
    serviceType : 'rospy_tutorials/AddTwoInts'
  });

  var request = new ROSLIB.ServiceRequest({
    a : 1,
    b : 2
  });

  addTwoIntsClient.callService(request, function(result) {
    console.log('Result for service call on '
      + addTwoIntsClient.name
      + ': '
      + result.sum);
  });

  // 获取和设置一个参数值

  ros.getParams(function(params) {
    console.log(params);
  });

  var maxVelX = new ROSLIB.Param({
    ros : ros,
    name : 'max_vel_y'
  });

  maxVelX.set(0.8);
  maxVelX.get(function(value) {
    console.log('MAX VAL: ' + value);
  });
</script>
</head>

<body>
  <h1>Simple roslib Example</h1>
  <p>Check your Web Console for output.</p>
</body>
</html>

ros部分(前提是安装过ros以及rosbridge_server等；详情见官方文档)


roscore

rostopic pub /listener std_msgs/String "Hello, World"

rostopic echo /cmd_vel

rosrun rospy_tutorials add_two_ints_server

roslaunch rosbridge_server rosbridge_websocket.launch

roslib案例官方文档 http://wiki.ros.org/roslibjs/Tutorials/BasicRosFunctionality#Running_the_Example

posted @ 2019-08-20 16:16 smileyqp 阅读(2138) 评论(0) 收藏举报

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