JeffRichards

• Interests: SysAdmin and Networking

Required Tools

• Small (00) Phillips Screwdriver
• Knife
• Razor blade/boxcutter blade
• USB to 4-pin Serial cable
• Laptop with ethernet, USB, and minicom (or software of choice) installed, and firmware image.
• POE injector

Initial Laptop Setup

1. Plug in serial cable
2. Launch terminal, check which device the serial cable is (try ls /dev/tty.* or ls /dev/ttyUSB* to see. Likely /dev/ttyUSB0 )
   1. Cable may need to be connected to show up
3. launch minicom config ( minicom -s)
4. Scroll down, select "Serial port setup" (3rd option)
5. Press "A" to edit Serial Device, enter device you identified in step 1 (e.g. /dev/ttyUSB0)
6. Doublecheck other settings (Bps/Par/Bits should be 115200 8N1)
7. Escape to return to main menu, then "Save setup as dfl" to make settings persistent,
8. exit settings to return to minicom (or launch minicom)
9. Launch a second terminal window, navigate to directory with firmware image (or use terminal tabs, but side-by-side windows is useful)
10. Copy filename of firmware image to clipboard for easy pasting.
11. Plug Ethernet into LAN port on POE (>>NOT THE POE SIDE<<)
12. Configure ethernet to 192.168.1.X/24, recommend 192.168.1.2 (sudo ifconfig [ethconnection] 192.168.1.2)

On the Access Point

1. Lift the sticker to expose small screw
2. Remove and secure screw
3. Pop end cap to reveal the port housing
4. Use knife to gently lift the port housing away from the shell (two small plastic pins will release)
5. Gently tug (may require fairly firm yank if shell is tight) circuit board out of the shell
6. Ensure shell pieces stay together (place end cap inside shell body), place shell to one side

On the Board

1. Attach Serial cable to pins on top left of board (ports are "down"). Pins are a bit smaller than normal so connections may be loose and require careful placement of the serial cable to establish a good connection, especially the Green/SIn
   1. Black Serial to Ground (top right of 8 pins)
   2. White to SOut (next pin down on right)
   3. Green to SIn (3rd pin down on right)
   4. NO RED -- leave unattached
2. Plug POE into Main port, watch for lights

In Terminal

1. Ping AP to confirm connection at default IP (ping 192.168.1.20)

In MiniCom

1. Very shortly after boot/reboot, there will be a prompt to "press any key to stop autoboot" -- you have 1 second to hit any key, or simply reboot the AP until you get to the prompt (should read e.g. ar7240> ). If you are getting weird text, check connection on green wire.
2. At prompt, type 'urescu -f -e' -- AP lights will change and eventually it will say "waiting for connection"

In Terminal

1. tftp to device (tftp 192.168.1.20)
2. At tftp prompt
   1. type 'bin'
   2. type 'tra'
   3. type 'put ' (with the space) then paste the firmware image filename
3. Watch the put run, it should complete without errors in 4.7-5 seconds

In MiniCom

1. Watch the write.
2. Watch the boot process, there will be a short pause after "done loading kernel modules", but will continue, will finish with a line that says something about "upper fs does not support..." at which point press enter to continue.
3. Check welcome banner for "v22.03.5"
4. There will be a welcome message encouraging you to set the root password (passwd, then type low security password twice to confirm)
5. type 'reboot' to reboot device, watch entire startup again.
6. When startup completes, press enter, then check the welcome message -- it should not prompt you to set the root password. If there is a prompt, the partition layout may not be correct, causing it to lose configuration across boots.

In Terminal

1. Ping to confirm the AP is now at the new IP (ping 192.168.1.1)
2. SSH to the AP to confirm connectivity and root password (ssh root@192.168.1.1)
   1. This may require updating known hosts depending on settings since the fingerprint will change for every AP