Archer C7 v5.6 + OpenWrt 19.07.7 Can't Install

I tried downloading openwrt-19.07.7-ath79-generic-tplink_archer-c7-v5-squashfs-factory.bin then renaming it to ArcherC7v5_tp_recovery.bin then used a tftp server (I just found this one which is way less annoying to use than the system tftp server https://github.com/crossbowerbt/tftpserver), when doing the song and dance with setting my IP to 192.168.0.66, holding the reset button in and powering on, it says:

192.168.0.86.2365: request received: get 'ArcherC7v5_tp_recovery.bin' octet
192.168.0.86.2365: transfer completed

The device spends a few moments, reboots, but, once rebooted, the device boots back into the stock firmware.

I've also verified by wireshark that it received the file correctly.

Any idea what could be different on the v5.6 instead of the v5?

There's no way of telling for sure, unless you connect a serial cable.

Does this help?

U-Boot 1.1.4-gcdf6499e-dirty (May 11 2019 - 14:47:06)

ap152 - Dragonfly 1.0

DRAM:  128 MB
Top of RAM usable for U-Boot at: 88000000
Reserving 408k for U-Boot at: 87f98000
Reserving 16448k for malloc() at: 86f88000
Reserving 44 Bytes for Board Info at: 86f87fd4
Reserving 36 Bytes for Global Data at: 86f87fb0
Reserving 128k for boot params() at: 86f67fb0
Stack Pointer at: 86f67f98
Now running in RAM - U-Boot at: 87f98000
Flash Manuf Id 0xef, DeviceId0 0x40, DeviceId1 0x18
flash size 16MB, sector count = 256
Flash: 16 MB
Using default environment

In:    serial
Out:   serial
Err:   serial
Net:   ath_gmac_enet_initialize...
No valid address in Flash. Using fixed address
ath_gmac_enet_initialize: reset mask:c02200 
athr_mgmt_init ::done
Dragonfly  ----> S17 PHY *
athrs17_reg_init: complete
SGMII in forced mode
athr_gmac_sgmii_setup SGMII done
: cfg1 0x80000000 cfg2 0x7114
eth0: 00:03:7f:09:0b:ad
eth0 up
eth0
Setting 0x181162c0 to 0x40802100
run command setenv serverip 192.168.0.66;setenv ipaddr 192.168.0.86
run command tftp 0x80060000 ArcherC7v5_tp_recovery.bin
Trying eth0
dup 1 speed 1000
Using eth0 device
TFTP from server 192.168.0.66; our IP address is 192.168.0.86
Download Filename 'ArcherC7v5_tp_recovery.bin'.
Download to address: 0x80060000
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done
Bytes transferred = 4491822 (448a2e hex)
Firmware downloaded... filesize = 0x448a2e fileaddr = 0x80060000.
Firmware Recovery file length : 4491822

Firmware process common.

Image verify OK!

Firmware file Verify ok!

[NM_Error](nm_checkUpgradeMode) 00870: Up file partition-table base address changed up(0x00040000) flash(0x00fc0000)!


[NM_Error](nm_checkUpdateContent) 01198: upgrade boot mode check fail.

[NM_Error](nm_buildUpgradeStruct) 01314: checkUpdateContent failed.

recovery failed.
now restart...�

U-Boot 1.1.4-gcdf6499e-dirty (May 11 2019 - 14:47:06)

ap152 - Dragonfly 1.0

DRAM:  128 MB

For reference, here is a regular successful boot log.