Engineering Clinic

Flow monitor in ns3 third.cc  See the video for full instruction and hands on Step 1:  Include the header #include "ns3/flow-monitor.h" #include "ns3/flow-monitor-helper.h" Step 2:  include the follwing above the Simulator::Run() // Flow monitor  Ptr<FlowMonitor> flowMonitor; FlowMonitorHelper flowHelper; flowMonitor = flowHelper.InstallAll(); Include the following line after the Simulator::Run() flowMonitor->SerializeToXmlFile("flowthird.xml", true, true); $] ./waf --run scratch/third thirdflow.xml $] ./waf --run "scratch/third --nCsma=10 --nWifi=10" We have done Step2: compilation Step 3: How to process .xml file in ns3, there is a python file to rpocess the flowmonitor xml files. copy the /home/pradeepkumar/ns-allinone-3.27/ns-3.27/src/flow-monitor/examples/flowmon-parse-results.py Copy the file to ns-3.27/ or to the scratch/ folder. To run this file $] python scratch/flowmon-parse-results.py flowthird.xml $] python scratch/flowmon-pa...

Native Temperature, Humidity and Pressure Sensor in Contiki NG  Implementation of Three sensors namely temperature, humidity and pressure sensor in contiki NG OS. We need four files namely Step 1: Create a Folder called temperature/ in the folder contiki-ng/examples/ and then copy paste the following four files to the above folder. // mytemp.h #ifndef MYTEMP_H #define MYTEMP_H struct Sensor {  char name[15];  float value; }; struct Sensor read_temperature(); struct Sensor read_humidity(); struct Sensor read_pressure(); #endif // mytemp.c #include "mytemp.h" #include <string.h> #include <stdlib.h> float random_value(float min, float max) {  float scale = rand() / (float) RAND_MAX;  return min + scale * (max - min); } struct Sensor read_temperature() {  struct Sensor temp;  strncpy(temp.name, "Temperature", 15);  temp.value = random_value(0, 35);  return temp; } struct Sensor read_humidity() {  struct Sensor humdidty;  str...

Counter Design in Contiki NG OS $] make TARGET=native Step 1 - Files needed  myowncounter.h, myowncounter.c and ngcounter.c Makefile. Inside the folder contiki-ng/examples/myowncounter Step 2:  //myowncounter.h #ifndef MYOWNCOUNTER_H #define MYOWNCOUNTER_H int next_round(int temp); #endif Step 3:  //myowncounter.c #include "myowncounter.h" int next_round(int temp) { if(temp>59) temp=1; else  temp++; return temp; } Step 4:  //ngcounter.c #include "contiki.h" #include "sys/etimer.h" #include "mycounter.h" #include <stdio.h> PROCESS(mycounter_process, "My Counter Process"); AUTOSTART_PROCESSES(&mycounter_process); static struct etimer et; static int count=0; PROCESS_THREAD(mycounter_process,ev,data) { PROCESS_BEGIN(); while(1) { etimer_set(&et, CLOCK_SECOND*2); PROCESS_WAIT_EVENT_UNTIL(etimer_Expired(&et)); count=next_round(count); printf("Count Value : %d\n",count); } PROCESS_END(); } Step 5: Mak...