I want to try some networking projects with Raspberry Pis, and I need to just send packets between a pair of pis. I would be happy as a first step just being able to ping between to Raspberry Pis in ad-hoc mode. I have not successfully done this despite looking at several tutorials and examples online.

I have 2x Raspberry Pis with the Debian Wheezy OS installed. I am using the following USB adapter which I installed firmware for on both pis and tested that they work by connected them in managed mode to a router: Bus 001 Device 004: ID 050d:945a Belkin Components F7D1101 v1 Basic Wireless Adapter [Realtek RTL8188SU]

Here are is some printouts about the networking information:

/etc/network/interfaces at each pi:


pi1@raspberrypi ~ $ cat /etc/network/interfaces 
auto lo
iface lo inet loopback
iface eth0 inet dhcp
auto wlan0
iface wlan0 inet manual
    address 192.168.2.1
    netmask 255.255.255.0
    wireless-channel 4
    wireless-essid pi-ad-hoc
    wireless-mode ad-hoc
pi2@raspberrypi ~ $ cat /etc/network/interfaces 
auto lo
iface lo inet loopback
iface eth0 inet dhcp
auto wlan0
iface wlan0 inet manual
    address 192.168.2.2
    netmask 255.255.255.0
    wireless-channel 4
    wireless-essid pi-ad-hoc
    wireless-mode ad-hoc

ifconfig at each pi:


pi1@raspberrypi ~ $ ifconfig wlan0
wlan0     Link encap:Ethernet  HWaddr ec:1a:59:46:8e:5a  
          inet addr:192.168.2.1  Bcast:192.168.2.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:26 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
pi2@raspberrypi ~ $ ifconfig wlan0
wlan0     Link encap:Ethernet  HWaddr ec:1a:59:46:59:0a  
          inet addr:192.168.2.2  Bcast:192.168.2.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  M
linux network-programming wireless raspberry-pi adhoc
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