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Kobo Clara 2E (kobo-clara2e)

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Kobo Clara 2E
CHANGE_ME
CHANGE_ME
Manufacturer Kobo
Name Clara 2E
Codename kobo-clara2e
Released 2022
Type ebook reader
Hardware
Chipset Freescale i.MX6SLL
CPU 1x 1 GHz Cortex-A9
GPU PXP + EPDC
Display 1448x1072 6 inch eink/epaper
Storage Internal 16GB uSD card
Memory 512 MB
Architecture armv7
Software
Original software Kobo firmware
FOSS bootloader yes
postmarketOS
Category testing
Pre-built images
Whether pre-built images are available here.
no
Mainline
Instead of a Linux kernel fork, it is possible to run (Close to) Mainline.
yes
pmOS kernel
The kernel version that runs on the device's port.
6.9.0
Features
Flashing
It is possible to flash the device with pmbootstrap flasher.
Untested
USB Networking
After connecting the device with USB to your PC, you can connect to it via telnet (initramfs) or SSH (booted system).
Works
Internal storage
eMMC, SD cards, UFS, ...
Untested
SD card
Also includes other external storage cards
Works
Battery
Charging and battery level reporting works
Partial
Screen
Display works. Ideally with sleep mode and brightness control.
Broken
Touchscreen
Works
Stylus
Untested
Connectivity
WiFi
Partial
Bluetooth
Partial
GPS
Untested
Miscellaneous
FDE
Full disk encryption and unlocking with unl0kr.
Untested
USB OTG
USB On-The-Go or USB-C Role switching
Untested
Sensors
Accelerometer
Auto screen rotation works in desktops e.g. Phosh or Plasma Mobile
Broken
Ambient Light
Untested
Proximity
Untested
Hall Effect
Also known as flip cover sensor
Untested
Power Sensor
Sensor to monitor current, voltage and power. Not fuel gauge!
Untested


Contributors

  • Andi

Users owning this device

  • Andi (Notes: Rev B)


How to enter flash mode

Installation

An original Kobo Clara 2E SD card or a copy (e.g. via dd) is recommended. The unpartitioned space at the beginning of the SD card contains the E-ink panel waveform information. This information is device batch specific and is copied to /lib/firmware/imx/epdc/epdc.fw on boot.

Replacing internal µSD Internal µSD card can be replaced by something bigger.

A recommended practice to install software is to clone the SD card and keep the old one as backup or have at least the hidden waveform partition in place. before doing pmbootstrap install

So basically pull out µSD and connect to your PC and do:

 dd if=/dev/sdX of=clara2e-backup.img

replace with something bigger (in reality only the waveform is needed but for simplicity) and do:

 dd if=clara2e-backup.img of=/dev/sdX

and then use that sdcard with pmbootstrap install --sdcard

Variants A/B

There are two variants of the device differencing in the PMIC used for the display. A has SY7636 and B has JD9930. The latter does not store the Vcom voltage needed contrary to the chips in the other ebook readers which all store the volatge non-volatile. The voltage differs a bit per device batch.

Bluetooth/WLAN

Bluetooth depends on the resources being enabled by the WLAN driver.

See also