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Ubiquiti Bullet M2

Not recommended for future use with OpenWrt due to low flash/ram.
Limitations in extensibility and stability of operation are to be expected.
See 432_warning for details.

Supported Versions

Hardware Highlights

ModelVersionSoCCPU MHzFlash MBRAM MBWLAN HardwareWLAN2.4WLAN5.0100M portsGbit portsModemUSB
Bullet MAtheros AR7240400832¿-a/n1---
Bullet M xwAtheros AR9342¿864Atheros AR9342b/g/na/n1---


Install OpenWrt (generic explanation)

Do not flash a device that has AirOS firmware beyond v.5.5.10 or you will brick your device! You must first revert to version 5.5.10 and then flash OpenWrt If you've already bricked your device, you may try to recover it

Note that OpenWrt should work on the Bullet M2 (2GHz), but someone on the ubnt forum says it will not work on the M5 (5GHz).

To flash an already running bullet with original firmware (AirOS) on CLI, you must do this:

ssh root@yourbullet

wget -O /tmp/fwupdate.bin "$url"
/usr/sbin/fwupdate -m

Firmware Install Ubnt Recovery Method

If you prefer TFTP, than you can update via holding down the reset-button for 10 seconds on startup, and send the firmware to
See →generic.flashing or →generic.flashing.tftp for instructions.


This section must be wrong since Bullet M2 should use Uboot.

Probably this is for Bullet2 (not M2).

FIXME If the bullet firmware was changed using Fon Flash using files …atheros-root.squashfs and …atheros-vmlinux.lzma the Redboot will have been changed. The result will be that the ubnt recovery method will no longer work.

To fix connect to your router using a serial cable and change the redboot to the below config.

RedBoot> fconfig -l
Run script at boot: true
Boot script:
.. cache off
.. fis load -d -e kernel
.. go

Boot script timeout (1000ms resolution): 1
Use BOOTP for network configuration: false
Gateway IP address:
Local IP address:
Local IP address mask:
Default server IP address:
Console baud rate: 9600
GDB connection port: 9000
Force console for special debug messages: false
Network debug at boot time: false



toh/ubiquiti/bullet.txt · Last modified: 2019/02/12 18:34 by tmomas