I had these same problems and got this reply from the manufacturer. The part in step 3 wasn't made clear in the instructions in the excel spreadsheet. They show it in the video but the explanation is in Chinese, so I didn't quite understand. Without this step their updater couldn't detect my keyboard. Once I followed these steps it worked 🙂 Hope this helps.
Here’s Step-by-Step Firmware Update Process：
1、Enable Bluetooth on Your Tablet:
Go to Settings > Bluetooth and make sure it’s turned on.
2、Launch the Firmware Update Tool:
Open the update software downloaded from our product page. (link is shared earlier in this thread.)
3、Press and Hold the A/T Key:
Locate the A/T key on your keyboard and keep it held down throughout the next steps.
Close and Reopen the Magnetic Cover (While Holding A/T):
Gently close the magnetic cover over the keyboard, then immediately open it again—do not release the A/T key during this action.
4、Check for the Red Indicator Light:
After reopening the cover, look for the red light on the keyboard. It should turn on if the steps are done correctly.
5、Scan and Update When Ready:
Once the red light is on, click "Scan for Devices" in the update tool and follow the prompts to complete the firmware installation.
Why This Step Is Critical
The magnetic cover triggers a hardware reset that prepares the keyboard for firmware installation. Without this, the update tool can’t establish a stable connection, leading to failed updates.
What to Expect
If done correctly, the red light will remain on throughout the update.
After this I had to unpair and re-pair the keyboard, but now I can close the cover and not have to re-pair it again each time, like I had to before the update.
