UAP-AC-M powered off after installing openwrt

[Hacksign]

Hi there,

I've got a unifi ac mesh device recent days, and I want openwrt running on it, so I read and followed instructions (except flash openwrt with serial console) on this page: https://openwrt.org/toh/ubiquiti/unifiac.

I know every steps' meaning, and there is no problem (no error reported) with every steps in all methods.

Here is an example when I do flashing:

UAP-AC-Mesh-BZ.6.7.35# LD_LIBRARY_PATH=${PWD}/lib lib/ld-musl-mips-sf.so.1 sbin/mtd write openwrt-24.10.4-ath79-generic-ubnt_unifiac-mesh-squashfs-sysupgrade.bin kernel0
Could not open mtd device: kernel0
Can't open device for writing!
UAP-AC-Mesh-BZ.6.7.35#
UAP-AC-Mesh-BZ.6.7.35#
UAP-AC-Mesh-BZ.6.7.35# echo "5edfacbf" > /proc/ubnthal/.uf
UAP-AC-Mesh-BZ.6.7.35# LD_LIBRARY_PATH=${PWD}/lib lib/ld-musl-mips-sf.so.1 sbin/mtd write openwrt-24.10.4-ath79-generic-ubnt_unifiac-mesh-squashfs-sysupgrade.bin kernel0
Unlocking kernel0 ...

Writing from openwrt-24.10.4-ath79-generic-ubnt_unifiac-mesh-squashfs-sysupgrade.bin to kernel0 ...
UAP-AC-Mesh-BZ.6.7.35# LD_LIBRARY_PATH=${PWD}/lib lib/ld-musl-mips-sf.so.1 sbin/mtd erase kernel1
Unlocking kernel1 ...
Erasing kernel1 ...
UAP-AC-Mesh-BZ.6.7.35# cat /proc/mtd
dev:    size   erasesize  name
mtd0: 00060000 00010000 "u-boot"
mtd1: 00010000 00010000 "u-boot-env"
mtd2: 00790000 00010000 "kernel0"
mtd3: 00790000 00010000 "kernel1"
mtd4: 00020000 00010000 "bs"
mtd5: 00040000 00010000 "cfg"
mtd6: 00010000 00010000 "EEPROM"
UAP-AC-Mesh-BZ.6.7.35# hexdump -C /dev/mtd4 | head
00000000  00 00 00 00 a3 4d e8 2b  00 00 00 00 00 00 00 00  |.....M.+........|
00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00020000
UAP-AC-Mesh-BZ.6.7.35# sync
UAP-AC-Mesh-BZ.6.7.35# reboot

But after reboot the device, UAP-AC-M powered off after some seconds.

The light of the device status are:

(power on) steady white light --> light off --> light on again with rapid fash (about 4 times per second) --> flash still rapidly but a little slower (about 3 times per second) --> light off (power off)

I'v tried factory firmware:
BZ.qca956x_6.7.35+15586.251030.2141.bin
BZ.qca956x.v3.7.58.6385.170508.0957.bin

I've tried openwrt firmware:
openwrt-24.10.4-ath79-generic-ubnt_unifiac-mesh-squashfs-sysupgrade.bin
openwrt-22.03.1-ath79-generic-ubnt_unifiac-mesh-squashfs-sysupgrade.bin

Everytime the device powered off, I can enter tftp recovery mode by booting the device with reset button.

So what can I do next ?

[frollic]

Get serial console access.

[Hacksign]

Turns out device is successfully boot up.

There is a blue light after boot up, but it can not be seen clealy under sun light

There is a small problem, UAP-AC-M's power is supplied by POE, there is no other RJ45 port, so I need to config my main router a 192.168.1.1/24 network interface then access it (changing UAP-AC-M's br-lan port to DHCP).

After chaning UAP-AC-M's br-lan to DHCP, then reboot, I can connect this device through my main router now

The lights of this device is very missleading, white light turned into a barely noticeable blue one ... can any one add a notice on the installation wiki page ?

[frollic]

@Hacksign

can any one add a notice on the installation wiki page ?

Could add "for best result, flash device in a darkroom" instead ,)