Solved: Hangiing TrekStor eBook Reader 4Ink from Weltbild

Experience with a TrekStor eBook Reader 4Ink from Weltbild.

The device seems to be dead. No advice, found on the internet about reseting the reader, helped to bring it back to life.
The screen remained blank.
But at least the red LED went on, when device was charged.
And if connected to a Windows PC, an USB device was recognized. But not driver was found for it. The hardware IDs for the USB device had been "USB\VID_071B&PID_3228".

The following steps describe, who I got installed the latest firmware on the device and by that got it back to work!

1. in the internet search for: 071b 3228 pyrus
=> one result should refer to URL http://id.readerportal.de/api/TrekStorProduct
2. open the specific URL
=> XML document about the different devices from TrekStor
3. search for your specific device, in this example "eBook Reader 4Ink"
=> you will find a section like the following:
	<TrekStorProduct>
	  <ProductType>eReader</ProductType>
	  <ProductName>eBook Reader 4Ink</ProductName>
	  <ProductID>005C</ProductID>
	  <UUIDPrefix>06</UUIDPrefix>
	  <FirmwareVersion>1.0.54</FirmwareVersion>
	  <ProductImage>http://id.readerportal.de/assets/Uploads/ProductImage4ink.jpg</ProductImage>
	  <FirmwareLink>http://id.readerportal.de/assets/</FirmwareLink>
	  <FirmwareImage>http://ota.readerportal.de/ebookreader/EBR40-WB-1.0.54.img.zip</FirmwareImage>
	  <ManualLink>http://id.readerportal.de/assets/</ManualLink>
	  <FirmwareInfo>Tool=RKDeviceManage;VendorID=1E68;RKUSB_VID=071B;RKUSB_PID=3228;Chipset=RK28 Device;minVersion=2.0.0;</FirmwareInfo>
	</TrekStorProduct>
4. download "FirmwareImage" from specified URL, in this example "http://ota.readerportal.de/ebookreader/EBR40-WB-1.0.54.img.zip"
5. extract *.img file from archive
=> that is your image file!

6. download the driver from URL http://www.haoyuelectronics.com/service/RK3066/tools/windows/RK_DriverAssitant.zip
7. download the AndroidTool from URL httphttp://www.haoyuelectronics.com/service/RK3066/tools/windows/AndroidTool_Release_v2.1.7z
8. open the URL http://www.hotmcu.com/wiki/Flashing_Firmware_Image_Files_Using_The_Rockchip_Tool
9. follow the instructions to install the driver
10. follow the instructions under "Using AndroidTool to flash update.img (Firmware)" to flash the firmware !!! use you image file from step 5 !!!

Note: If the driver was installed correct and the ebook reader was connected in the recovery mode to the PC, the AndroidTool will show the message "Found One LOADER Device", instead of "No Found any Devices".


Recovery Mode
The following page explains that the VOL+ button needs to be pressed to get the device into the recivery mode.
	http://www.hotmcu.com/wiki/How_to_enter_MarsBoard_RK3066_recovery_mode
At the time my ebook reader was "dead", there was no need to press any button. It seems like it got automatiucally into the recovery mode, when connected to the PC.
However, once the ebook reader was working again, I had to press the button on the side (either flip back or flip forward) - instead of VOL+ - to get it into the recovery mode.