wiki_wifi_sniffing.md

@@ -5,8 +5,10 @@
 this hard ware we recommend to be used for WiFi sniffing:
 
 *  [CSL USB 2.0 WLAN Adapter 300Mbit (2,4/5GHz)](https://www.amazon.de/gp/product/B00LLIOT34/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1)
-*  ![Bild](uploads/9dade57ecba2a155db45080b1b7aa341/813SDizswWL._AC_SL1500_.jpg)
-*  cost below 20USD/Euro
+  *  ![Bild](uploads/9dade57ecba2a155db45080b1b7aa341/813SDizswWL._AC_SL1500_.jpg)
+  *  cost below 20USD/Euro
+*  optional you can use a AirPcap NX
+*  optional Octoscope Device
 
 This HW based on a Chipsatz: Ralink RT5572 and is Dual Freq. 2.4 and 5 GHz as well as it has RP-SMA Antenna Connectors. The standard Linux Kernel Driver has built in and enabled Monitor Mode which is needed to fetch all WiFi Traffic. By use of another WiFi Stick/Module please need make sure you will have a Driver with enabled Monitor Mode available. 
 
@@ -18,6 +20,17 @@ This HW based on a Chipsatz: Ralink RT5572 and is Dual Freq. 2.4 and 5 GHz as we
 
 To setup and configure the WiFi HW driver, Linux Network Subsystem as well as Wireshark with all needed parameter we provide [here](uploads/9e42a63a7c00ffa051a42f1f82beaedd/ltrx_wifi_sniffer.sh) a Script to setup all automatic.
 
+## generate data traffic
+to generate traffic and test the performance use below commands or adapt them according to you needs:
+
+*  Setup Receive System (Linux PC/Laptop/Server)
+  *  setup with iperf command : `iperf -s -u -i1`
+  *  example : `iperf -s -u -i1`
+
+*  Setup Sender System (Linux PC/Laptop/Server)
+  *  setup with iperf command : `iperf -c<IP of Receiver> -u -b<data rate in Mbit/s>M -i1 -t<how long in s>`
+  *  example : `iperf -c192.168.1.2 -u -b1M -i1 -t900`
+
 ## Notes
 
 *  please use the WiFi interface of the HW you want to use `phy#*`