How to Download Firmware from Boox

[Stefan1985]

I'm stuck downloading the Boox Firmware upx files. How do I create a download link?

it looks like I can get informations like finger etc with simple adb commands.

adb shell getprop ro.product.model
adb shell getprop ro.product.device
adb shell getprop ro.build.fingerprint
adb shell getprop ro.build.display.id
adb shell getprop ro.build.version.incremental

I found this for the Go 7 Color:
http://data.onyx-international.cn/api/firmware/update?where={%22buildNumber%22:0,%22buildType%22: %22user%22,%22deviceMAC%22:%22%22,%22lang%22:%22en _US%22,%22model%22:%22GoColor7%22,%22submodel%22:% 22%22,%22fingerprint%22:%20%22Onyx/GoColor7/GoColor%22}

But I have a Boox Tab Ultra C and I didn't get it to work yet.

[Renate]

Model:  TabUltraC (English)
Finger: Onyx/TabUltraC/TabUltraC:11/2026-06-08_14-35_4.2-rel_0605_cf5a910290/51392:user/release-keys
Link:   http://firmware-us.boox.com/06ea6268409b640577cf551f9625f3a5/update.upx
Size:   1,863,704,908
MD5:    06ea6268409b640577cf551f9625f3a5