aqara g3 doesn't scan qr code

[Guizzan]

I have downgraded the software to version 3.3.4. Reseted the camera and pressed for 10 seconds to activate pairing mode, but for some reason it won't read any QR code (aQRootg3.py generated or original QR code from Aqara home app). When I update the software back to the latest version, it starts reading again. What can I do in this situation?

[sdavides]

strange, not even the original app?

did you copy all the files to downgrade root.fs and others?

[Guizzan]

Yes, I first tried with only root.fs, then with all the files.

[EricCorleone]

Same issue here @niceboygithub @Necroneco I've tried v3.3.2 and v3.3.4, the camera won't read any QR code (aQRootg3.py generated or original QR code from Aqara home app). But the latest version (v4.1.6) can read the QR code from Aqara Home App instantly. Is there any way to solve this? I've spent my whole night on it lol

PS: You may say the QR code may be too small to scan, but I casted the QR code (generated from aQRootg3.py) on my TV, so it's large enough for G3 to scan.

[EricCorleone]

Is it possible that it's because there are blank space in my ssid? But it can't explain why g3 couldn't read the qr code from aqara app...

I tested v3.2.7 tonight, and it doesn't work either.

[Guizzan]

Is it possible that it's because there are blank space in my ssid? But it can't explain why g3 couldn't read the qr code from aqara app...

I tested v3.2.7 tonight, and it doesn't work either.

My ssid or password doesn't contain any blank space or invalid characters. It's most probably some software/hardware lock that prevents to use lower versions.

[EricCorleone]

Is it possible that it's because there are blank space in my ssid? But it can't explain why g3 couldn't read the qr code from aqara app...
I tested v3.2.7 tonight, and it doesn't work either.

My ssid or password doesn't contain any blank space or invalid characters. It's most probably some software/hardware lock that prevents to use lower versions.

I searched for solutions on the Internet, and it seems this method still worked in 2023, but my camera is also produced in 2023, so it doesn't look like a hardware lock.

I also tried to update it to v4.1.6, paired it with Aqara Home app, then downgraded it to v3.3.4 without resetting the camera. As you can see, after that the camera is still connected to the Aqara Home app and the version number is 3.3.4, so the firmware is successfully flashed into the camera, therefore, it doesn't look like a software lock either. But somehow it just cannot read any QR code anymore. So weird!

[Pitti3301]

Same issue here, the camera won't read any QR code. Is there another way to activate telnet on a downgraded g3?

[sdavides]

1. the qrcode image must not be too large, but small ( try zoom in or out )
2. distance camera-display ~15/20 cm | image large ~10/11 cm
3. the wifi sid and password must not have special characters.
4. try modifying the script, I also had problems and tried changing the payload if I remember correctly.

[tomaszbartoszewskitb]

Having the same issue on a G3 shipped with 4.0.2 firmware (EU). When downgrading to 3.3.4, 3.3.2 or 3.2.7 the camera cannot read QR code from both the app and the script at different sizes and distances from the camera. Before downgrading the camera was reset with 10 clicks. I have also tried flashing rootfs.bin alone, and all of the .bin files.

[Pitti3301]

With the conditions from sdavides, the camera is connected to the WLAN for a few seconds. Then the error message "account binding failed" appears. What could be the reason for this?

[sdavides]

Is correct as written in the guide.
"Then the error message "account binding failed" appears." it means that it ran the qr script but did not bind with aqara, now all that remains is to restart the scanning procedure, without restarting device, with official qr , if I'm not mistaken, hold down the button and the voice indicates to scan

[Pitti3301]

That worked great. Thanks for the tip.

[sdavides]

That worked great. Thanks for the tip.

See my repo for Aqara G3 !!

[Pitti3301]

Another question about the update. Version 3.3.4 is currently running. The next step is to install version 3.3.9 manually before installing a custom version. What steps are necessary to update to 3.3.9?

[sdavides]

Download 3.3.9
Unzip
Copy file on sd
Hold down button and start device
Follow guide on my repo AqaraPost