>echo(0);
=undefined
>trace()
#1[r2,l1] Object {
  #2[r1,l2] Name String [1 blocks] "˙"    #3[r1,l2] Object {
      #6[r1,l2] Name String [1 blocks] "net"        #4[r1,l2] String [2 blocks] "\x04\x00\x00\x00\x00˙˙˙"
      #9[r1,l2] Name String [2 blocks] "timers"        #11[r2,l1] Array(0) [ ]
      #12[r1,l2] Name String [2 blocks] "watches"        #14[r2,l1] Array(0) [ ]
      #15[r1,l2] Name String [2 blocks] "history"        #19[r1,l1] Array(52) [
          #485[r1,l2] Name Integer 46            #484[r1,l1] String [5 blocks] "/** UNSUBSCRIBE control packet */"
          #414[r1,l2] Name Integer 47            #48[r1,l1] String [32 blocks] "MQTT.prototype.mqttUnsubscribe = function(topic) {\n  var cmd = TYPE.UNSUBSCRIBE << 4 | 2;\n  var pid = String.fromCharCode(C.PACKET_ID<<8, C.PACKET_ID&255);\n  return this.mqttPacket(cmd,\n           pid/*Packet id*/,\n           this.mqttStr(topic));\n};"
          #391[r1,l2] Name Integer 48            #392[r1,l1] String [7 blocks] "/* Exports *************************************/"
          #767[r1,l2] Name Integer 49            #766[r1,l1] String [13 blocks] "/** This is 'exported' so it can be used with `require('MQTT.js').create(server, options)` */"
          #497[r1,l2] Name Integer 50            #361[r1,l1] String [11 blocks] "exports.create = function (server, options) {\n  return new MQTT(server, options);\n};"
          #498[r1,l2] Name Integer 51            #499[r1,l1] String [2 blocks] "echo(1);"
        ]
      #32[r1,l2] Name String [2 blocks] "modules"        #34[r1,l1] Object { }
    }
  #22[r1,l2] Name String [2 blocks] "Modules"    #23[r1,l1] NativeFunction 0x40222d98 (1) { }
  #38[r1,l2] Name String [2 blocks] "exports"    #42[r1,l1] Object {
      #360[r1,l2] Name String [2 blocks] "create"        #409[r1,l1] Function {
          #415[r1,l2] Name Param "server"             undefined
          #400[r1,l2] Name Param "options"             undefined
          #496[r1,l2] Name String [1 blocks] "˙cod"            #350[r1,l1] String [6 blocks] "{\n  return new MQTT(server, options);\n}"
        }
    }
  #79[r1,l2] Name String [1 blocks] "C"    #78[r1,l1] Object {
      #77[r1,l2] Name String [2 blocks] "PACKET_ID"= int 1
      #75[r1,l2] Name String [3 blocks] "PROTOCOL_LEVEL"= int 4
    }
  #130[r1,l2] Name String [1 blocks] "TYPE"    #129[r1,l1] Object {
      #128[r1,l2] Name String [2 blocks] "CONNECT"= int 1
      #126[r1,l2] Name String [2 blocks] "CONNACK"= int 2
      #124[r1,l2] Name String [2 blocks] "PUBLISH"= int 3
      #122[r1,l2] Name String [2 blocks] "PUBACK"= int 4
      #120[r1,l2] Name String [2 blocks] "PUBREC"= int 5
      #118[r1,l2] Name String [2 blocks] "PUBREL"= int 6
      #116[r1,l2] Name String [2 blocks] "PUBCOMP"= int 7
      #114[r1,l2] Name String [2 blocks] "SUBSCRIBE"= int 8
      #112[r1,l2] Name String [2 blocks] "SUBACK"= int 9
      #110[r1,l2] Name String [2 blocks] "UNSUBSCRIBE"= int 10
      #108[r1,l2] Name String [2 blocks] "UNSUBACK"= int 11
      #106[r1,l2] Name String [2 blocks] "PINGREQ"= int 12
      #104[r1,l2] Name String [2 blocks] "PINGRESP"= int 13
      #102[r1,l2] Name String [2 blocks] "DISCONNECT"= int 14
    }
  #254[r1,l2] Name String [1 blocks] "MQTT"    #253[r2,l1] Function {
      #252[r1,l2] Name Param "server"         undefined
      #250[r1,l2] Name Param "options"         undefined
      #346[r1,l2] Name String [1 blocks] "˙cod"        #248[r1,l1] String [84 blocks] "{\n  this.server = server;\n  var options = options || {};\n  this.port = options.port || this.C.DEF_PORT;\n  this.client_id = options.client_id || this.mqttUid();\n  this.keep_alive = options.keep_alive || this.C.DEF_KEEP_ALIVE;\n  this.clean_session = options.clean_session || true;\n  this.username = options.username;\n  this.password = options.password;\n  this.client = false;\n  this.connected = false;\n  this.ping_interval =\n    this.keep_alive < this.C.PING_INTERVAL ? (this.keep_alive - 5) : this.C.PING_INTERVAL;\n  this.protocol_name = options.protocol_name || \"MQTT\";\n  this.protocol_level = this.createEscapedHex( options.protocol_level || C.PROTOCOL_LEVEL );\n}"
      #386[r1,l2] Name String [2 blocks] "prototype"        #389[r1,l1] Object {
          #388[r1,l2] Name String [2 blocks] "constructor"            #253[r2,l2] ...
 
          #384[r1,l2] Name String [1 blocks] "C"            #383[r1,l1] Object {
              #382[r1,l2] Name String [2 blocks] "DEF_QOS"= int 0
              #380[r1,l2] Name String [2 blocks] "DEF_PORT"                #378[r1,l1] Integer 1883
              #377[r1,l2] Name String [3 blocks] "DEF_KEEP_ALIVE"= int 60
              #374[r1,l2] Name String [3 blocks] "CONNECT_TIMEOUT"                #371[r1,l1] Integer 5000
              #370[r1,l2] Name String [3 blocks] "PING_INTERVAL"= int 40
            }
          #440[r1,l2] Name String [2 blocks] "mqttStr"            #438[r1,l1] Function {
              #437[r1,l2] Name Param "s"                 undefined
              #455[r1,l2] Name String [1 blocks] "˙cod"                #436[r1,l1] String [9 blocks] "{\n  return String.fromCharCode(s.length>>8, s.length&255)+s;\n}"
            }
          #482[r1,l2] Name String [2 blocks] "mqttPacket"            #480[r1,l1] Function {
              #479[r1,l2] Name Param "cmd"                 undefined
              #478[r1,l2] Name Param "variable"                 undefined
              #476[r1,l2] Name Param "payload"                 undefined
              #504[r1,l2] Name String [1 blocks] "˙cod"                #474[r1,l1] String [12 blocks] "{\n  return String.fromCharCode(cmd, variable.length+payload.length)+variable+payload;\n}"
            }
          #580[r1,l2] Name String [2 blocks] "parsePublish"            #578[r1,l1] Function {
              #577[r1,l2] Name Param "data"                 undefined
              #647[r1,l2] Name String [1 blocks] "˙cod"                #576[r1,l1] String [61 blocks] "{\n  if (data.length > 5 && typeof data !== undefined) {\n    var cmd = data.charCodeAt(0);\n    var rem_len = data.charCodeAt(1);\n    var var_len = data.charCodeAt(2) << 8 | data.charCodeAt(3);\n    return { topic: data.substr(4, var_len),\n             message: data.substr(4+var_len, rem_len-var_len),\n             dup: (cmd & 0b00001000) >> 3,\n             qos: (cmd & 0b00000110) >> 1,\n             retain: cmd & 0b00000001\n           };\n  }\n  else {\n    return undefined;\n  }\n}"
            }
          #682[r1,l2] Name String [2 blocks] "mqttUid"            #736[r1,l1] Function {
              #742[r1,l2] Name String [1 blocks] "˙cod"                #737[r1,l1] String [5 blocks] "{\n    return s4() + s4() + s4();\n  }"
              #743[r1,l2] Name String [1 blocks] "˙sco"                #713[r2,l1] Function {
                  #714[r1,l2] Name String [2 blocks] "return"                    undefined
                  #716[r1,l2] Name String [1 blocks] "s4"                    #717[r1,l1] Function {
                      #734[r1,l2] Name String [1 blocks] "˙cod"                        #718[r1,l1] String [16 blocks] "{\n    return Math.floor((1 + Math.random()) * 0x10000)\n               .toString(16)\n               .substring(1);\n  }"
                      #735[r1,l2] Name String [1 blocks] "˙sco"                        #713[r2,l2] ...
 
                    }
                }
            }
          #674[r1,l2] Name String [3 blocks] "createEscapedHex"            #671[r1,l1] Function {
              #670[r1,l2] Name Param "number"                 undefined
              #757[r1,l2] Name String [1 blocks] "˙cod"                #668[r1,l1] String [10 blocks] "{\n  return String.fromCharCode(parseInt( number.toString(16) , 16));\n}"
            }
          #1019[r1,l2] Name String [2 blocks] "connect"            #1017[r1,l1] Function {
              #1016[r1,l2] Name Param "client"                 undefined
              #349[r1,l2] Name String [1 blocks] "˙cod"                #1014[r1,l1] String [239 blocks] "{\n  var mqo = this;\n  var onConnect = function() {\n    console.log('Client connected');\n    client.write(mqo.mqttConnect(mqo.client_id));\n\n    // Disconnect if no CONNACK is received\n    mqo.ctimo = setTimeout(function() {\n      mqo.disconnect();\n    }, mqo.C.CONNECT_TIMEOUT);\n\n    // Set up regular keep_alive ping\n    mqo.pintr = setInterval(function() {\n      // console.log(\"Pinging MQTT server\");\n      mqo.ping();\n    }, mqo.ping_interval*1000);\n\n    // Incoming data\n    client.on('data', function(data) {\n      var type = data.charCodeAt(0) >> 4;\n\n      if(type === TYPE.PUBLISH) {\n        mqo.emit('publish', mqo.parsePublish(data));\n      }\n      else if(type === TYPE.PUBACK) {\n        // implement puback\n      }\n      else if(type === TYPE.SUBACK) {\n        // implement suback\n      }\n      else if(type === TYPE.UNSUBACK) {\n        // implement unsuback\n      }\n      else if(type === TYPE.PINGREQ) {\n        // silently reply to pings\n        client.write(TYPE.PINGRESP+\"\\x00\"); // reply to PINGREQ\n      }\n      else if(type === TYPE.PINGRESP) {\n        mqo.emit('ping_reply');\n      }\n      else if(type === TYPE.CONNACK) {\n        clearTimeout(mqo.ctimo);\n        if(data.charCodeAt(3) === 0) {\n          mqo.connected = true;\n          console.log(\"MQTT connection accepted\");\n          mqo.emit('connected');\n        }\n        else {\n          console.log(\"MQTT connection error\");\n        }\n      }\n      else {\n        console.log(\"MQTT unsupported packet type: \"+type);\n        console.log(\"[MQTT]\"+data.split(\"\").map(function(c) { return c.charCodeAt(0); }));\n      }\n    });\n\n    client.on('end', function() {\n      console.log('MQTT client disconnected');\n      clearInterval(mqo.pintr);\n      mqo.emit('disconnected');\n    });\n\n    mqo.client = client;\n  };\n  if (client) onConnect();\n  else client = require(\"net\").connect({host : mqo.server, port: mqo.port}, onConnect);\n}"
            }
          #464[r1,l2] Name String [2 blocks] "disconnect"            #466[r1,l1] Function {
              #467[r1,l2] Name Param "topic"                 undefined
              #461[r1,l2] Name Param "message"                 undefined
              #519[r1,l2] Name String [1 blocks] "˙cod"                #443[r1,l1] String [19 blocks] "{\n  this.client.write(String.fromCharCode(TYPE.DISCONNECT<<4)+\"\\x00\");\n  this.client.end();\n  this.client = false;\n  this.connected = false;\n}"
            }
          #626[r1,l2] Name String [2 blocks] "publish"            #628[r1,l1] Function {
              #629[r1,l2] Name Param "topic"                 undefined
              #631[r1,l2] Name Param "message"                 undefined
              #633[r1,l2] Name Param "qos"                 undefined
              #603[r1,l2] Name String [1 blocks] "˙cod"                #634[r1,l1] String [13 blocks] "{\n  var _qos = qos || this.C.DEF_QOS;\n  this.client.write(this.mqttPublish(topic, message, _qos));\n}"
            }
          #654[r1,l2] Name String [2 blocks] "subscribe"            #652[r1,l1] Function {
              #651[r1,l2] Name Param "topic"                 undefined
              #583[r1,l2] Name Param "qos"                 undefined
              #695[r1,l2] Name String [1 blocks] "˙cod"                #584[r1,l1] String [13 blocks] "{\n  var _qos = qos || this.C.DEF_QOS;\n  this.client.write(this.mqttSubscribe(topic, _qos));\n}"
            }
          #758[r1,l2] Name String [2 blocks] "unsubscribe"            #660[r1,l1] Function {
              #661[r1,l2] Name Param "topic"                 undefined
              #677[r1,l2] Name String [1 blocks] "˙cod"                #663[r1,l1] String [8 blocks] "{\n  this.client.write(this.mqttUnsubscribe(topic));\n}"
            }
          #1020[r1,l2] Name String [1 blocks] "ping"            #348[r1,l1] Function {
              #771[r1,l2] Name String [1 blocks] "˙cod"                #775[r1,l1] String [10 blocks] "{\n  this.client.write(String.fromCharCode(TYPE.PINGREQ<<4)+\"\\x00\");\n}"
            }
          #271[r1,l2] Name String [4 blocks] "createFlagsForConnection"            #267[r1,l1] Function {
              #266[r1,l2] Name Param "options"                 undefined
              #306[r1,l2] Name String [1 blocks] "˙cod"                #264[r1,l1] String [27 blocks] "{\n  var flags = 0;\n  flags |= ( this.username )? 0x80 : 0;\n  flags |= ( this.username && this.password )? 0x40 : 0;\n  flags |= ( options.clean_session )? 0x02 : 0;\n  return this.createEscapedHex( flags );\n}"
            }
          #68[r1,l2] Name String [2 blocks] "mqttConnect"            #66[r1,l1] Function {
              #72[r1,l2] Name Param "clean"                 undefined
              #609[r1,l2] Name String [1 blocks] "˙cod"                #93[r1,l1] String [78 blocks] "{\n  var cmd = TYPE.CONNECT << 4;\n  var flags = this.createFlagsForConnection({\n    clean_session: clean\n  });\n\n  var keep_alive = String.fromCharCode(this.keep_alive>>8, this.keep_alive&255);\n\n  /* payload */\n  var payload = this.mqttStr(this.client_id);\n  if( this.username ){\n    payload += this.mqttStr( this.username );\n    if( this.password ){\n      payload += this.mqttStr( this.password );\n    }\n  }\n\n  return this.mqttPacket(cmd,\n           this.mqttStr( this.protocol_name )/*protocol name*/+\n           this.protocol_level /*protocol level*/+\n           flags+\n           keep_alive,\n           payload);\n}"
            }
          #744[r1,l2] Name String [2 blocks] "mqttPublish"            #676[r1,l1] Function {
              #688[r1,l2] Name Param "topic"                 undefined
              #686[r1,l2] Name Param "message"                 undefined
              #689[r1,l2] Name Param "qos"                 undefined
              #307[r1,l2] Name String [1 blocks] "˙cod"                #690[r1,l1] String [37 blocks] "{\n  var cmd = TYPE.PUBLISH << 4 | (qos << 1);\n  var pid = String.fromCharCode(C.PACKET_ID<<8, C.PACKET_ID&255);\n  // Packet id must be included for QOS > 0\n  var variable = (qos === 0) ? this.mqttStr(topic) : this.mqttStr(topic)+pid;\n  return this.mqttPacket(cmd, variable, message);\n}"
            }
          #339[r1,l2] Name String [3 blocks] "mqttSubscribe"            #342[r1,l1] Function {
              #255[r1,l2] Name Param "topic"                 undefined
              #71[r1,l2] Name Param "qos"                 undefined
              #490[r1,l2] Name String [1 blocks] "˙cod"                #70[r1,l1] String [31 blocks] "{\n  var cmd = TYPE.SUBSCRIBE << 4 | 2;\n  var pid = String.fromCharCode(C.PACKET_ID<<8, C.PACKET_ID&255);\n  return this.mqttPacket(cmd,\n           pid/*Packet id*/,\n           this.mqttStr(topic)+\n           String.fromCharCode(qos)/*QOS*/);\n}"
            }
          #49[r1,l2] Name String [3 blocks] "mqttUnsubscribe"            #52[r1,l1] Function {
              #53[r1,l2] Name Param "topic"                 undefined
              #413[r1,l2] Name String [1 blocks] "˙cod"                #55[r1,l1] String [26 blocks] "{\n  var cmd = TYPE.UNSUBSCRIBE << 4 | 2;\n  var pid = String.fromCharCode(C.PACKET_ID<<8, C.PACKET_ID&255);\n  return this.mqttPacket(cmd,\n           pid/*Packet id*/,\n           this.mqttStr(topic));\n}"
            }
        }
    }
}
=undefined
>process.memory()
={ "free": 95, "usage": 928, "total": 1023, "history": 80 }
>