Some success with Raspberry Pi 3 onboard wifi bridge.

[William Hill]

The wifi in built in to the Raspberry Pi can't be bridged - see here for why: https://wiki.openwrt.org/doc/howto/clientmode#bridged_client_mode_issues

However, there's "pseudo-bridging", and I found this guide: https://wiki.debian.org/BridgeNetworkConnectionsProxyArp

So, I've set up my Pi3 with static IP 192.168.1.140 - Here's my interfaces file:

source-directory /etc/network/interfaces.d

auto lo wlan0

iface lo inet loopback

allow-hotplug eth0

iface eth0 inet dhcp

iface wlan0 inet static

  address 192.168.1.140

  gateway 192.168.1.1

  netmask 255.255.255.0

  wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

And static IPs for the Zeros - Here's the interfaces from "p1":

source-directory /etc/network/interfaces.d

auto lo usb0

iface lo inet loopback

iface usb0 inet static

  address 192.168.1.141

  gateway 192.168.1.1

  netmask 255.255.255.0

Then what I did on the controller to get everything working:

root@controller:~# echo 1 > /proc/sys/net/ipv4/conf/all/proxy_arp

root@controller:~# echo 1 > /proc/sys/net/ipv4/ip_forward

root@controller:~# controllerhat on p1 p2

Turning on P1

Turning on P2

...wait...wait...wait...

root@controller:~# ifconfig ethpi1 up

root@controller:~# ifconfig ethpi2 up

root@controller:~# ip ro add 192.168.1.141/32 dev ethpi1

root@controller:~# ip ro add 192.168.1.142/32 dev ethpi2

(I've only got the 2 PiZero, so far...)

This will need automating, but I can ssh the Zeros over wifi now.

[Alexis Iglauer]

I've not done this with the clusterHAT, but have set up a wireless bridge before using this set of instructions: https://wiki.debian.org/BridgeNetworkConnectionsProxyArp  Key is to use parprouted (and avahi, but that's installed already).  No need to fix the IPs of the zeros (for this purpose).

Best regards

Alexis

[William Hill]

I've updated for the Debian9/Stretch based OS now.

Here's the snippet of my /etc/rc.local

  echo 1 > /proc/sys/net/ipv4/ip_forward

  clusterhat on

  sleep 15

  ifconfig ethpi1 up || true

  ip ro add 192.168.1.141/32 dev ethpi1 || true

  ifconfig ethpi2 up || true

  ip ro add 192.168.1.142/32 dev ethpi2 || true

  ifconfig ethpi3 up || true

  ip ro add 192.168.1.143/32 dev ethpi3 || true

  ifconfig ethpi4 up || true

  ip ro add 192.168.1.144/32 dev ethpi4 || true

  parprouted -d ethpi1 ethpi2 ethpi3 ethpi4 wlan0

I haven't added anything to /etc/network/interfaces and wpa_supplicant.conf is setup for my default SSID.