Saturday, March 2, 2019

Nook Simple Touch with a External Keyboard

You can plug an external USB keyboard to a Nook simple Touch and type to make your e-ink reader a tool to write documents. I really love e-ink screens as they are easy on your eyes for long writing sessions.

You will need:

  • A rooted Nook Simple Touch.
  • An OTG cable adapter.
  • A cheap external keyboard .
  • ADB Command line tools from:
  • Two binary images: uImage and uRamdisk that you can download from here:
  • USB Mode Utility apk from

How to do it

Install ADB

I am usign Mac here so the file I downloaded is:

Unzip the sdk tools to a folder, lets name it adb but it could be any name.

In the same folder copy the two images files uImage and uRamdisk and the USB Mode apk UsbMode-1.7a.apk

Connect the Nook Simple Touch to the computer and from the adb folder type:

./adb shell
# mount -o rw,remount rootfs /
# mkdir /boot
# mount -t vfat /dev/block/mmcblk0p1 /boot
# exit

./adb shell
./adb push uImage /boot/
./adb push uRamdisk /boot/
./adb install UsbMode-1.7.apk
./adb reboot

By doing the instructions: ./adb push uImage /boot/ and ./adb push uRamdisk /boot/ you just replaced the boot files and with the UsbMode apk you will open the Host mode through the usb port to use the external keyboard.

How to type

  • Unplug the Nook Simple Touch from the computer.
  • Plug the external keyboard.
  • Open the UsbMode Utility application.
  • Click on Host.
  • The green Led lights up.
  • Open a Text Editor, I have installed Jota.
  • Type :D
  • When you are finish typing, click on Peripheral.
  • The green red light is off.
  • Unplug the keyboard.

Watch the whole thing working


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