Download CPAmesh firmware.

The downloaded file will be saved to your computer. In this example, the file is named "CPAmesh-atheros-ubnt2-squashfs.bin" and is for the Ubiquiti PowerStation 2.

Requirements:

• Direct ethernet cable connection between PC and Ubiquiti Router (the "device")
• Network settings of PC: 192.168.1.254/255.255.255.0
• TFTP client on PC
• CPAmesh firmware file available here

Flash procedure

First of all, power off the device.

1. Power it on and keep on holding reset button for ~10 seconds (do not hold it longer!).
2. Make sure device responds to pinging (ping 192.168.1.20), if it does not, go to step 1.
3. Using TFTP client software, upload "CPAmesh-atheros-ubnt2-squashfs.bin" to 192.168.1.20 in binary mode.
4. Signal LEDs will be blinking during firmware upgrade.
5. Wait for about 7 minutes on Device (to be safe) - do not power off the device during procedure!
6. Device should be alive by now.

Example of steps 4-5:

Here is log of the steps 4-5 from Linux terminal:
----------------------------------------------------------------
ubnt@dev:/tmp> ping -c 3 192.168.1.20
PING 192.168.1.20 (192.168.1.20) 56(84) bytes of data.
64 bytes from 192.168.1.20: icmp_seq=1 ttl=128 time=0.285 ms
64 bytes from 192.168.1.20: icmp_seq=2 ttl=128 time=0.296 ms
64 bytes from 192.168.1.20: icmp_seq=3 ttl=128 time=0.333 ms

--- 192.168.1.20 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1998ms
rtt min/avg/max/mdev = 0.285/0.304/0.333/0.028 ms

ubnt@dev:/tmp> tftp 192.168.1.20
tftp> bin
tftp> put CPAmesh-atheros-ubnt2-squashfs.bin
Sent xxxxx bytes in 28.8 seconds
tftp> exit

Note that Windows Vista also has a tftp feature that can be installed:

1. Open the Control Panel in Windows Vista and select "Programs".
2. You'll find a "Programs and Features" section.  Select "Turn Windows features on or off".
3. Scroll down the list of applications and select the option TFTP Client and click OK.
4. Windows will install the tftp client (this can take some time).
5. You can now use tftp in windows vista.

The syntax is a bit different.  To flash the device, use:

tftp -i 192.168.1.20 PUT CPAmesh-atheros-ubnt2-squashfs.bin